diff --git a/algorithms-genetic/pom.xml b/algorithms-genetic/pom.xml
index 00c9b88dfe..c53ae0f776 100644
--- a/algorithms-genetic/pom.xml
+++ b/algorithms-genetic/pom.xml
@@ -35,18 +35,11 @@
             <artifactId>jenetics</artifactId>
             <version>${io.jenetics.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${org.assertj.core.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <properties>
         <commons-math3.version>3.6.1</commons-math3.version>
         <io.jenetics.version>3.7.0</io.jenetics.version>
-        <org.assertj.core.version>3.9.0</org.assertj.core.version>
         <commons-codec.version>1.11</commons-codec.version>
     </properties>
 
diff --git a/algorithms-miscellaneous-1/pom.xml b/algorithms-miscellaneous-1/pom.xml
index dd3742d4b0..3b55d979fe 100644
--- a/algorithms-miscellaneous-1/pom.xml
+++ b/algorithms-miscellaneous-1/pom.xml
@@ -35,12 +35,6 @@
             <version>${lombok.version}</version>
             <scope>provided</scope>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${org.assertj.core.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>com.github.dpaukov</groupId>
             <artifactId>combinatoricslib3</artifactId>
@@ -70,7 +64,6 @@
 
     <properties>
         <commons-math3.version>3.6.1</commons-math3.version>
-        <org.assertj.core.version>3.9.0</org.assertj.core.version>
         <commons-codec.version>1.11</commons-codec.version>
         <guava.version>27.0.1-jre</guava.version>
         <combinatoricslib3.version>3.3.0</combinatoricslib3.version>
diff --git a/algorithms-miscellaneous-2/pom.xml b/algorithms-miscellaneous-2/pom.xml
index fcefc3ccba..a411cfdb71 100644
--- a/algorithms-miscellaneous-2/pom.xml
+++ b/algorithms-miscellaneous-2/pom.xml
@@ -45,12 +45,6 @@
             <artifactId>tradukisto</artifactId>
             <version>${tradukisto.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${org.assertj.core.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <reporting>
@@ -78,7 +72,6 @@
         <tradukisto.version>1.0.1</tradukisto.version>
         <org.jgrapht.core.version>1.0.1</org.jgrapht.core.version>
         <org.jgrapht.ext.version>1.0.1</org.jgrapht.ext.version>
-        <org.assertj.core.version>3.9.0</org.assertj.core.version>
         <commons-codec.version>1.11</commons-codec.version>
         <cobertura-maven-plugin.version>2.7</cobertura-maven-plugin.version>
     </properties>
diff --git a/algorithms-miscellaneous-3/pom.xml b/algorithms-miscellaneous-3/pom.xml
index 19eca8eca7..525a2556de 100644
--- a/algorithms-miscellaneous-3/pom.xml
+++ b/algorithms-miscellaneous-3/pom.xml
@@ -14,12 +14,6 @@
     </parent>
 
     <dependencies>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${org.assertj.core.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-collections4</artifactId>
@@ -69,7 +63,6 @@
     </dependencies>
 
     <properties>
-        <org.assertj.core.version>3.9.0</org.assertj.core.version>
         <commons-collections4.version>4.3</commons-collections4.version>
         <guava.version>28.0-jre</guava.version>
         <retrofit.version>2.6.0</retrofit.version>
diff --git a/algorithms-miscellaneous-4/pom.xml b/algorithms-miscellaneous-4/pom.xml
index 1eae038bc0..8417c121bf 100644
--- a/algorithms-miscellaneous-4/pom.xml
+++ b/algorithms-miscellaneous-4/pom.xml
@@ -25,16 +25,9 @@
             <version>${lombok.version}</version>
             <scope>provided</scope>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${org.assertj.core.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <properties>
-        <org.assertj.core.version>3.9.0</org.assertj.core.version>
         <guava.version>27.0.1-jre</guava.version>
     </properties>
 
diff --git a/algorithms-miscellaneous-5/pom.xml b/algorithms-miscellaneous-5/pom.xml
index c68ac96c38..4a0abc5cba 100644
--- a/algorithms-miscellaneous-5/pom.xml
+++ b/algorithms-miscellaneous-5/pom.xml
@@ -34,17 +34,10 @@
             <artifactId>guava</artifactId>
             <version>${guava.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${org.assertj.core.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <properties>
         <tradukisto.version>1.0.1</tradukisto.version>
-        <org.assertj.core.version>3.9.0</org.assertj.core.version>
         <commons-codec.version>1.11</commons-codec.version>
         <commons-math3.version>3.6.1</commons-math3.version>
         <guava.version>28.1-jre</guava.version>
diff --git a/algorithms-miscellaneous-6/pom.xml b/algorithms-miscellaneous-6/pom.xml
index a9eb75cf1e..1984139069 100644
--- a/algorithms-miscellaneous-6/pom.xml
+++ b/algorithms-miscellaneous-6/pom.xml
@@ -19,12 +19,6 @@
             <artifactId>guava</artifactId>
             <version>${guava.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${org.assertj.core.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.projectlombok</groupId>
             <artifactId>lombok</artifactId>
@@ -40,7 +34,6 @@
 
     <properties>
         <guava.version>28.1-jre</guava.version>
-        <org.assertj.core.version>3.9.0</org.assertj.core.version>
         <commons-math3.version>3.6.1</commons-math3.version>
     </properties>
 
diff --git a/algorithms-searching/pom.xml b/algorithms-searching/pom.xml
index a67c062403..edb8a0c423 100644
--- a/algorithms-searching/pom.xml
+++ b/algorithms-searching/pom.xml
@@ -13,15 +13,6 @@
         <version>1.0.0-SNAPSHOT</version>
     </parent>
 
-    <dependencies>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${org.assertj.core.version}</version>
-            <scope>test</scope>
-        </dependency>
-    </dependencies>
-
     <build>
         <finalName>algorithms-searching</finalName>
         <resources>
@@ -32,8 +23,4 @@
         </resources>
     </build>
 
-    <properties>
-        <org.assertj.core.version>3.9.0</org.assertj.core.version>
-    </properties>
-
 </project>
\ No newline at end of file
diff --git a/algorithms-sorting-2/pom.xml b/algorithms-sorting-2/pom.xml
index c9bec354f3..a8477bf624 100644
--- a/algorithms-sorting-2/pom.xml
+++ b/algorithms-sorting-2/pom.xml
@@ -29,17 +29,10 @@
             <version>${lombok.version}</version>
             <scope>provided</scope>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${org.assertj.core.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <properties>
         <commons-math3.version>3.6.1</commons-math3.version>
-        <org.assertj.core.version>3.9.0</org.assertj.core.version>
         <commons-codec.version>1.11</commons-codec.version>
     </properties>
 
diff --git a/algorithms-sorting/pom.xml b/algorithms-sorting/pom.xml
index e916d0aae5..383014d528 100644
--- a/algorithms-sorting/pom.xml
+++ b/algorithms-sorting/pom.xml
@@ -30,17 +30,10 @@
             <version>${lombok.version}</version>
             <scope>provided</scope>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${org.assertj.core.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <properties>
         <commons-math3.version>3.6.1</commons-math3.version>
-        <org.assertj.core.version>3.9.0</org.assertj.core.version>
         <commons-codec.version>1.11</commons-codec.version>
     </properties>
 
diff --git a/apache-kafka/pom.xml b/apache-kafka/pom.xml
index 8003743f95..9ff894bc55 100644
--- a/apache-kafka/pom.xml
+++ b/apache-kafka/pom.xml
@@ -98,12 +98,6 @@
             <artifactId>jackson-databind</artifactId>
             <version>${jackson.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.testcontainers</groupId>
             <artifactId>kafka</artifactId>
@@ -170,7 +164,6 @@
     </dependencies>
 
     <properties>
-        <assertj.version>3.6.2</assertj.version>
         <kafka.version>2.8.0</kafka.version>
         <testcontainers-kafka.version>1.15.3</testcontainers-kafka.version>
         <testcontainers-jupiter.version>1.15.3</testcontainers-jupiter.version>
diff --git a/apache-libraries/pom.xml b/apache-libraries/pom.xml
index b4cf11b07d..3d78869865 100644
--- a/apache-libraries/pom.xml
+++ b/apache-libraries/pom.xml
@@ -156,13 +156,6 @@
             <artifactId>solr-solrj</artifactId>
             <version>${solr.solr-solrj.version}</version>
         </dependency>
-        <!-- common -->
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <build>
@@ -202,7 +195,6 @@
         <maven.compiler.target>1.8</maven.compiler.target>
         <avro.version>1.8.2</avro.version>
         <beam.version>2.19.0</beam.version>
-        <assertj.version>3.9.0</assertj.version>
         <bval.version>1.1.2</bval.version>
         <javax.validation.validation-api.version>1.1.0.Final</javax.validation.validation-api.version>
         <meecrowave-junit.version>1.2.0</meecrowave-junit.version>
diff --git a/aws/pom.xml b/aws/pom.xml
index 1663266612..7c363eb400 100644
--- a/aws/pom.xml
+++ b/aws/pom.xml
@@ -26,12 +26,6 @@
             <version>${mockito-core.version}</version>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>com.amazonaws</groupId>
             <artifactId>aws-lambda-java-core</artifactId>
@@ -118,7 +112,6 @@
         <gson.version>2.8.0</gson.version>
         <aws-java-sdk.version>1.11.290</aws-java-sdk.version>
         <mockito-core.version>2.21.0</mockito-core.version>
-        <assertj-core.version>3.8.0</assertj-core.version>
         <dynamodblocal.version>1.11.86</dynamodblocal.version>
         <dynamodblocal.repository.url>https://s3-us-west-2.amazonaws.com/dynamodb-local/release</dynamodblocal.repository.url>
         <commons-codec-version>1.10.L001</commons-codec-version>
diff --git a/blade/pom.xml b/blade/pom.xml
index 8fc517e966..9c8638f0bc 100644
--- a/blade/pom.xml
+++ b/blade/pom.xml
@@ -36,12 +36,6 @@
             <scope>provided</scope>
         </dependency>
         <!-- TEST -->
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.apache.httpcomponents</groupId>
             <artifactId>httpclient</artifactId>
@@ -119,7 +113,6 @@
         <httpclient.version>4.5.6</httpclient.version>
         <httpmime.version>4.5.6</httpmime.version>
         <httpcore.version>4.4.10</httpcore.version>
-        <assertj-core.version>3.11.1</assertj-core.version>
         <maven-failsafe-plugin.version>3.0.0-M3</maven-failsafe-plugin.version>
         <process-exec-maven-plugin.version>0.7</process-exec-maven-plugin.version>
         <assembly.plugin.version>3.1.0</assembly.plugin.version>
diff --git a/cdi/pom.xml b/cdi/pom.xml
index 5eb566dcfb..ee23e082c7 100644
--- a/cdi/pom.xml
+++ b/cdi/pom.xml
@@ -25,12 +25,6 @@
             <artifactId>weld-se-core</artifactId>
             <version>${weld-se-core.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.aspectj</groupId>
             <artifactId>aspectjweaver</artifactId>
@@ -53,7 +47,6 @@
         <cdi-api.version>2.0.SP1</cdi-api.version>
         <weld-se-core.version>3.0.5.Final</weld-se-core.version>
         <aspectjweaver.version>1.9.2</aspectjweaver.version>
-        <assertj-core.version>3.10.0</assertj-core.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-11-2/pom.xml b/core-java-modules/core-java-11-2/pom.xml
index 2b7b042c61..332b24ff2e 100644
--- a/core-java-modules/core-java-11-2/pom.xml
+++ b/core-java-modules/core-java-11-2/pom.xml
@@ -20,12 +20,6 @@
             <artifactId>guava</artifactId>
             <version>${guava.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.mock-server</groupId>
             <artifactId>mockserver-junit-jupiter</artifactId>
@@ -87,7 +81,6 @@
         <maven.compiler.source.version>11</maven.compiler.source.version>
         <maven.compiler.target.version>11</maven.compiler.target.version>
         <guava.version>29.0-jre</guava.version>
-        <assertj.version>3.17.2</assertj.version>
         <mockserver.version>5.11.1</mockserver.version>
         <jakarta.ws-api.version>3.0.0</jakarta.ws-api.version>
         <jaxws-rt.version>3.0.0</jaxws-rt.version>
diff --git a/core-java-modules/core-java-11/pom.xml b/core-java-modules/core-java-11/pom.xml
index d3ffb0a8f0..fc61e373ec 100644
--- a/core-java-modules/core-java-11/pom.xml
+++ b/core-java-modules/core-java-11/pom.xml
@@ -21,12 +21,6 @@
             <artifactId>guava</artifactId>
             <version>${guava.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.openjdk.jmh</groupId>
             <artifactId>jmh-core</artifactId>
@@ -103,7 +97,6 @@
         <maven.compiler.source.version>11</maven.compiler.source.version>
         <maven.compiler.target.version>11</maven.compiler.target.version>
         <guava.version>27.1-jre</guava.version>
-        <assertj.version>3.11.1</assertj.version>
         <uberjar.name>benchmarks</uberjar.name>
         <eclipse.collections.version>10.0.0</eclipse.collections.version>
         <shade.plugin.version>3.2.4</shade.plugin.version>
diff --git a/core-java-modules/core-java-12/pom.xml b/core-java-modules/core-java-12/pom.xml
index 516f28fc3a..9f95b1bc3f 100644
--- a/core-java-modules/core-java-12/pom.xml
+++ b/core-java-modules/core-java-12/pom.xml
@@ -16,12 +16,6 @@
     </parent>
 
     <dependencies>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>commons-io</groupId>
             <artifactId>commons-io</artifactId>
@@ -53,7 +47,6 @@
     <properties>
         <maven.compiler.source.version>12</maven.compiler.source.version>
         <maven.compiler.target.version>12</maven.compiler.target.version>
-        <assertj.version>3.6.1</assertj.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-13/pom.xml b/core-java-modules/core-java-13/pom.xml
index d28618a21a..9e42838971 100644
--- a/core-java-modules/core-java-13/pom.xml
+++ b/core-java-modules/core-java-13/pom.xml
@@ -16,15 +16,6 @@
         <version>1.0.0-SNAPSHOT</version>
     </parent>
 
-    <dependencies>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
-    </dependencies>
-
     <build>
         <plugins>
             <plugin>
@@ -52,7 +43,6 @@
     <properties>
         <maven.compiler.source.version>13</maven.compiler.source.version>
         <maven.compiler.target.version>13</maven.compiler.target.version>
-        <assertj.version>3.6.1</assertj.version>
         <surefire.plugin.version>3.0.0-M3</surefire.plugin.version>
     </properties>
 
diff --git a/core-java-modules/core-java-14/pom.xml b/core-java-modules/core-java-14/pom.xml
index 3967ce3455..35ea0bd2d0 100644
--- a/core-java-modules/core-java-14/pom.xml
+++ b/core-java-modules/core-java-14/pom.xml
@@ -14,15 +14,6 @@
         <version>1.0.0-SNAPSHOT</version>
     </parent>
 
-    <dependencies>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
-    </dependencies>
-
     <build>
         <plugins>
             <plugin>
@@ -49,7 +40,6 @@
 
     <properties>
         <maven.compiler.release>14</maven.compiler.release>
-        <assertj.version>3.6.1</assertj.version>
         <maven-compiler-plugin.version>3.8.1</maven-compiler-plugin.version>
         <surefire.plugin.version>3.0.0-M3</surefire.plugin.version>
     </properties>
diff --git a/core-java-modules/core-java-15/pom.xml b/core-java-modules/core-java-15/pom.xml
index a71987c23a..8cb6c2410d 100644
--- a/core-java-modules/core-java-15/pom.xml
+++ b/core-java-modules/core-java-15/pom.xml
@@ -21,12 +21,6 @@
             <artifactId>commons-lang3</artifactId>
             <version>${commons-lang3.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <build>
@@ -55,7 +49,6 @@
 
     <properties>
         <maven.compiler.release>15</maven.compiler.release>
-        <assertj.version>3.17.2</assertj.version>
         <maven-compiler-plugin.version>3.8.1</maven-compiler-plugin.version>
         <surefire.plugin.version>3.0.0-M3</surefire.plugin.version>
     </properties>
diff --git a/core-java-modules/core-java-16/pom.xml b/core-java-modules/core-java-16/pom.xml
index 99952a73d9..4adc3ee6d1 100644
--- a/core-java-modules/core-java-16/pom.xml
+++ b/core-java-modules/core-java-16/pom.xml
@@ -17,12 +17,6 @@
     </parent>
 
     <dependencies>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-lang3</artifactId>
@@ -67,7 +61,6 @@
         <maven.compiler.target.version>16</maven.compiler.target.version>
         <maven.compiler.release>16</maven.compiler.release>
         <surefire.plugin.version>3.0.0-M5</surefire.plugin.version>
-        <assertj.version>3.17.2</assertj.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-17/pom.xml b/core-java-modules/core-java-17/pom.xml
index 677454a64b..2fe16cad57 100644
--- a/core-java-modules/core-java-17/pom.xml
+++ b/core-java-modules/core-java-17/pom.xml
@@ -16,15 +16,6 @@
         <relativePath>../../</relativePath>
     </parent>
 
-    <dependencies>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
-    </dependencies>
-
     <build>
         <plugins>
             <plugin>
@@ -63,7 +54,6 @@
         <maven.compiler.target.version>17</maven.compiler.target.version>
         <maven.compiler.release>17</maven.compiler.release>
         <surefire.plugin.version>3.0.0-M5</surefire.plugin.version>
-        <assertj.version>3.17.2</assertj.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-8-2/pom.xml b/core-java-modules/core-java-8-2/pom.xml
index af26289db8..7db1e1ed4e 100644
--- a/core-java-modules/core-java-8-2/pom.xml
+++ b/core-java-modules/core-java-8-2/pom.xml
@@ -20,17 +20,10 @@
             <artifactId>icu4j</artifactId>
             <version>${icu.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <properties>
         <icu.version>64.2</icu.version>
-        <assertj.version>3.12.2</assertj.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-8-datetime-2/pom.xml b/core-java-modules/core-java-8-datetime-2/pom.xml
index e662ba400c..9e54b0ee12 100644
--- a/core-java-modules/core-java-8-datetime-2/pom.xml
+++ b/core-java-modules/core-java-8-datetime-2/pom.xml
@@ -25,12 +25,6 @@
             <artifactId>joda-time</artifactId>
             <version>${joda-time.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>log4j</groupId>
             <artifactId>log4j</artifactId>
@@ -63,8 +57,6 @@
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>
         <joda-time.version>2.10</joda-time.version>
-        <!-- testing -->
-        <assertj.version>3.6.1</assertj.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-8-datetime/pom.xml b/core-java-modules/core-java-8-datetime/pom.xml
index f58557df7f..01ec6c0b76 100644
--- a/core-java-modules/core-java-8-datetime/pom.xml
+++ b/core-java-modules/core-java-8-datetime/pom.xml
@@ -25,12 +25,6 @@
             <artifactId>joda-time</artifactId>
             <version>${joda-time.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>log4j</groupId>
             <artifactId>log4j</artifactId>
@@ -64,8 +58,6 @@
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>
         <joda-time.version>2.10</joda-time.version>
-        <!-- testing -->
-        <assertj.version>3.6.1</assertj.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-8/pom.xml b/core-java-modules/core-java-8/pom.xml
index 987ba2e568..85e289280b 100644
--- a/core-java-modules/core-java-8/pom.xml
+++ b/core-java-modules/core-java-8/pom.xml
@@ -31,13 +31,6 @@
             <version>${lombok.version}</version>
             <scope>provided</scope>
         </dependency>
-        <!-- test scoped -->
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <build>
@@ -53,8 +46,6 @@
     <properties>
         <!-- util -->
         <commons-collections4.version>4.1</commons-collections4.version>
-        <!-- testing -->
-        <assertj.version>3.6.1</assertj.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-9-improvements/pom.xml b/core-java-modules/core-java-9-improvements/pom.xml
index 6abdd7dab8..e6c596937b 100644
--- a/core-java-modules/core-java-9-improvements/pom.xml
+++ b/core-java-modules/core-java-9-improvements/pom.xml
@@ -21,12 +21,6 @@
             <version>${awaitility.version}</version>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>com.google.guava</groupId>
             <artifactId>guava</artifactId>
@@ -68,8 +62,6 @@
     </pluginRepositories>
 
     <properties>
-        <!-- testing -->
-        <assertj.version>3.10.0</assertj.version>
         <awaitility.version>1.7.0</awaitility.version>
         <maven.compiler.source>1.9</maven.compiler.source>
         <maven.compiler.target>1.9</maven.compiler.target>
diff --git a/core-java-modules/core-java-9-new-features/pom.xml b/core-java-modules/core-java-9-new-features/pom.xml
index 7dca8d5f88..ce90a0f04a 100644
--- a/core-java-modules/core-java-9-new-features/pom.xml
+++ b/core-java-modules/core-java-9-new-features/pom.xml
@@ -20,12 +20,6 @@
             <artifactId>rxjava</artifactId>
             <version>${rxjava.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.junit.platform</groupId>
             <artifactId>junit-platform-runner</artifactId>
@@ -156,8 +150,6 @@
 
     <properties>
         <rxjava.version>3.0.0</rxjava.version>
-        <!-- testing -->
-        <assertj.version>3.10.0</assertj.version>
         <awaitility.version>4.0.2</awaitility.version>
         <maven.compiler.source>1.9</maven.compiler.source>
         <maven.compiler.target>1.9</maven.compiler.target>
diff --git a/core-java-modules/core-java-9/pom.xml b/core-java-modules/core-java-9/pom.xml
index d4d58085c8..03a097e7a9 100644
--- a/core-java-modules/core-java-9/pom.xml
+++ b/core-java-modules/core-java-9/pom.xml
@@ -21,12 +21,6 @@
             <version>${awaitility.version}</version>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>com.google.guava</groupId>
             <artifactId>guava</artifactId>
@@ -78,8 +72,6 @@
     </pluginRepositories>
 
     <properties>
-        <!-- testing -->
-        <assertj.version>3.10.0</assertj.version>
         <awaitility.version>1.7.0</awaitility.version>
         <maven.compiler.source>1.9</maven.compiler.source>
         <maven.compiler.target>1.9</maven.compiler.target>
diff --git a/core-java-modules/core-java-annotations/pom.xml b/core-java-modules/core-java-annotations/pom.xml
index 7e87678159..a1f84ab563 100644
--- a/core-java-modules/core-java-annotations/pom.xml
+++ b/core-java-modules/core-java-annotations/pom.xml
@@ -14,15 +14,6 @@
         <version>0.0.1-SNAPSHOT</version>
     </parent>
 
-    <dependencies>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
-    </dependencies>
-
     <build>
         <finalName>core-java-annotations</finalName>
         <resources>
@@ -32,9 +23,5 @@
             </resource>
         </resources>
     </build>
-    
-    <properties>
-        <assertj-core.version>3.10.0</assertj-core.version>
-    </properties>
 
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-arrays-guides/pom.xml b/core-java-modules/core-java-arrays-guides/pom.xml
index 0c8b680c1b..d22f6b4d7d 100644
--- a/core-java-modules/core-java-arrays-guides/pom.xml
+++ b/core-java-modules/core-java-arrays-guides/pom.xml
@@ -24,16 +24,6 @@
             <artifactId>jmh-generator-annprocess</artifactId>
             <version>${jmh-generator.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
-    <properties>
-        <assertj.version>3.19.0</assertj.version>
-    </properties>
-
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-arrays-operations-advanced/pom.xml b/core-java-modules/core-java-arrays-operations-advanced/pom.xml
index 50830eba2a..cbcd6ae440 100644
--- a/core-java-modules/core-java-arrays-operations-advanced/pom.xml
+++ b/core-java-modules/core-java-arrays-operations-advanced/pom.xml
@@ -19,12 +19,6 @@
             <artifactId>commons-lang3</artifactId>
             <version>${commons-lang3.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.openjdk.jmh</groupId>
             <artifactId>jmh-core</artifactId>
@@ -64,8 +58,4 @@
         </plugins>
     </build>
 
-    <properties>
-        <assertj-core.version>3.10.0</assertj-core.version>
-    </properties>
-
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-arrays-operations-basic/pom.xml b/core-java-modules/core-java-arrays-operations-basic/pom.xml
index 382cee102d..6517b2efb9 100644
--- a/core-java-modules/core-java-arrays-operations-basic/pom.xml
+++ b/core-java-modules/core-java-arrays-operations-basic/pom.xml
@@ -30,12 +30,6 @@
             <artifactId>jmh-generator-annprocess</artifactId>
             <version>${jmh-generator.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <build>
@@ -67,7 +61,6 @@
 
     <properties>
         <shade.plugin.version>3.2.0</shade.plugin.version>
-        <assertj-core.version>3.10.0</assertj-core.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-arrays-sorting/pom.xml b/core-java-modules/core-java-arrays-sorting/pom.xml
index e9946d46ed..97ff95e92b 100644
--- a/core-java-modules/core-java-arrays-sorting/pom.xml
+++ b/core-java-modules/core-java-arrays-sorting/pom.xml
@@ -36,13 +36,6 @@
             <artifactId>jmh-generator-annprocess</artifactId>
             <version>${jmh-generator.version}</version>
         </dependency>
-        <!-- Testing -->
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <build>
@@ -75,7 +68,6 @@
     <properties>
         <shade.plugin.version>3.2.0</shade.plugin.version>
         <guava.version>28.2-jre</guava.version>
-        <assertj-core.version>3.10.0</assertj-core.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-char/pom.xml b/core-java-modules/core-java-char/pom.xml
index 009197a1d0..7dc0923fb5 100644
--- a/core-java-modules/core-java-char/pom.xml
+++ b/core-java-modules/core-java-char/pom.xml
@@ -15,12 +15,6 @@
     </parent>
 
     <dependencies>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.openjdk.jmh</groupId>
             <artifactId>jmh-core</artifactId>
@@ -33,8 +27,4 @@
         </dependency>
     </dependencies>
 
-    <properties>
-        <assertj.version>3.11.1</assertj.version>
-    </properties>
-
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-collections-2/pom.xml b/core-java-modules/core-java-collections-2/pom.xml
index 0f1f1ee2fe..23100b1d87 100644
--- a/core-java-modules/core-java-collections-2/pom.xml
+++ b/core-java-modules/core-java-collections-2/pom.xml
@@ -34,12 +34,6 @@
             <artifactId>commons-lang3</artifactId>
             <version>${commons-lang3.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.junit.platform</groupId>
             <artifactId>junit-platform-runner</artifactId>
@@ -51,7 +45,6 @@
     <properties>
         <eclipse.collections.version>7.1.0</eclipse.collections.version>
         <commons-collections4.version>4.1</commons-collections4.version>
-        <assertj.version>3.11.1</assertj.version>
         <commons-exec.version>1.3</commons-exec.version>
     </properties>
 
diff --git a/core-java-modules/core-java-collections-3/pom.xml b/core-java-modules/core-java-collections-3/pom.xml
index 4ca4bda1ee..6ef8e3c81a 100644
--- a/core-java-modules/core-java-collections-3/pom.xml
+++ b/core-java-modules/core-java-collections-3/pom.xml
@@ -25,12 +25,6 @@
             <artifactId>jmh-core</artifactId>
             <version>${jmh-core.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-lang3</artifactId>
@@ -39,7 +33,6 @@
     </dependencies>
 
     <properties>
-        <assertj.version>3.11.1</assertj.version>
         <jol-core.version>0.10</jol-core.version>
     </properties>
 
diff --git a/core-java-modules/core-java-collections-4/pom.xml b/core-java-modules/core-java-collections-4/pom.xml
index d86b04644c..2193b5118a 100644
--- a/core-java-modules/core-java-collections-4/pom.xml
+++ b/core-java-modules/core-java-collections-4/pom.xml
@@ -14,17 +14,4 @@
         <version>0.0.1-SNAPSHOT</version>
     </parent>
 
-    <dependencies>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
-    </dependencies>
-
-    <properties>
-        <assertj.version>3.19.0</assertj.version>
-    </properties>
-
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-collections-array-list/pom.xml b/core-java-modules/core-java-collections-array-list/pom.xml
index c14e59bac0..ca9c173947 100644
--- a/core-java-modules/core-java-collections-array-list/pom.xml
+++ b/core-java-modules/core-java-collections-array-list/pom.xml
@@ -20,17 +20,10 @@
             <artifactId>commons-collections4</artifactId>
             <version>${commons-collections4.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <properties>
         <commons-collections4.version>4.1</commons-collections4.version>
-        <assertj.version>3.11.1</assertj.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-collections-list-2/pom.xml b/core-java-modules/core-java-collections-list-2/pom.xml
index 51e66fc0c2..7876b19cf9 100644
--- a/core-java-modules/core-java-collections-list-2/pom.xml
+++ b/core-java-modules/core-java-collections-list-2/pom.xml
@@ -20,12 +20,6 @@
             <artifactId>commons-collections4</artifactId>
             <version>${commons-collections4.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.projectlombok</groupId>
             <artifactId>lombok</artifactId>
@@ -36,7 +30,6 @@
 
     <properties>
         <commons-collections4.version>4.1</commons-collections4.version>
-        <assertj.version>3.11.1</assertj.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-collections-list-3/pom.xml b/core-java-modules/core-java-collections-list-3/pom.xml
index efe79509c1..9238939df7 100644
--- a/core-java-modules/core-java-collections-list-3/pom.xml
+++ b/core-java-modules/core-java-collections-list-3/pom.xml
@@ -26,12 +26,6 @@
             <version>${guava.version}</version>
             <scope>compile</scope>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>net.sf.trove4j</groupId>
             <artifactId>trove4j</artifactId>
@@ -61,7 +55,6 @@
 
     <properties>
         <commons-collections4.version>4.1</commons-collections4.version>
-        <assertj.version>3.11.1</assertj.version>
         <trove4j.version>3.0.2</trove4j.version>
         <fastutil.version>8.1.0</fastutil.version>
         <colt.version>1.2.0</colt.version>
diff --git a/core-java-modules/core-java-collections-list/pom.xml b/core-java-modules/core-java-collections-list/pom.xml
index ae1e1561c6..b60906d1ba 100644
--- a/core-java-modules/core-java-collections-list/pom.xml
+++ b/core-java-modules/core-java-collections-list/pom.xml
@@ -25,17 +25,10 @@
             <artifactId>commons-lang3</artifactId>
             <version>${commons-lang3.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <properties>
         <commons-collections4.version>4.1</commons-collections4.version>
-        <assertj.version>3.11.1</assertj.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-collections-maps-2/pom.xml b/core-java-modules/core-java-collections-maps-2/pom.xml
index 772cf30416..060796fafa 100644
--- a/core-java-modules/core-java-collections-maps-2/pom.xml
+++ b/core-java-modules/core-java-collections-maps-2/pom.xml
@@ -51,12 +51,6 @@
             <version>${avaitility.version}</version>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <properties>
@@ -66,7 +60,6 @@
         <eclipse-collections.version>8.2.0</eclipse-collections.version>
         <hppc.version>0.7.2</hppc.version>
         <fastutil.version>8.1.0</fastutil.version>
-        <assertj.version>3.11.1</assertj.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-collections-maps/pom.xml b/core-java-modules/core-java-collections-maps/pom.xml
index 245c4b04bb..66aca9c1b2 100644
--- a/core-java-modules/core-java-collections-maps/pom.xml
+++ b/core-java-modules/core-java-collections-maps/pom.xml
@@ -20,17 +20,10 @@
             <artifactId>commons-collections4</artifactId>
             <version>${commons-collections4.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <properties>
         <commons-collections4.version>4.1</commons-collections4.version>
-        <assertj.version>3.6.1</assertj.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-collections/pom.xml b/core-java-modules/core-java-collections/pom.xml
index 8fbc6e8de7..8df0d7cdd3 100644
--- a/core-java-modules/core-java-collections/pom.xml
+++ b/core-java-modules/core-java-collections/pom.xml
@@ -15,12 +15,6 @@
     </parent>
 
     <dependencies>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.openjdk.jmh</groupId>
             <artifactId>jmh-core</artifactId>
@@ -33,8 +27,4 @@
         </dependency>
     </dependencies>
 
-    <properties>
-        <assertj.version>3.11.1</assertj.version>
-    </properties>
-
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-concurrency-advanced-2/pom.xml b/core-java-modules/core-java-concurrency-advanced-2/pom.xml
index 93c23ccae7..1f19dc8cca 100644
--- a/core-java-modules/core-java-concurrency-advanced-2/pom.xml
+++ b/core-java-modules/core-java-concurrency-advanced-2/pom.xml
@@ -30,12 +30,6 @@
             <artifactId>jmh-generator-annprocess</artifactId>
             <version>${jmh-generator.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <build>
@@ -48,8 +42,4 @@
         </resources>
     </build>
 
-    <properties>
-        <assertj.version>3.6.1</assertj.version>
-    </properties>
-
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-concurrency-advanced-3/pom.xml b/core-java-modules/core-java-concurrency-advanced-3/pom.xml
index 915aa8d912..591e46f505 100644
--- a/core-java-modules/core-java-concurrency-advanced-3/pom.xml
+++ b/core-java-modules/core-java-concurrency-advanced-3/pom.xml
@@ -15,12 +15,6 @@
     </parent>
 
     <dependencies>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>com.jcabi</groupId>
             <artifactId>jcabi-aspects</artifactId>
@@ -94,7 +88,6 @@
     </build>
 
     <properties>
-        <assertj.version>3.14.0</assertj.version>
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>
         <jcabi-aspects.version>0.22.6</jcabi-aspects.version>
diff --git a/core-java-modules/core-java-concurrency-advanced/pom.xml b/core-java-modules/core-java-concurrency-advanced/pom.xml
index 3c21b49ae5..a026bdb2cd 100644
--- a/core-java-modules/core-java-concurrency-advanced/pom.xml
+++ b/core-java-modules/core-java-concurrency-advanced/pom.xml
@@ -35,12 +35,6 @@
             <artifactId>commons-math3</artifactId>
             <version>${commons-math3.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>com.jayway.awaitility</groupId>
             <artifactId>awaitility</artifactId>
@@ -60,13 +54,10 @@
     </build>
 
     <properties>
-        <!-- util -->
         <guava.version>21.0</guava.version>
         <commons-math3.version>3.6.1</commons-math3.version>
         <commons-collections4.version>4.1</commons-collections4.version>
         <collections-generic.version>4.01</collections-generic.version>
-        <!-- testing -->
-        <assertj.version>3.6.1</assertj.version>
         <avaitility.version>1.7.0</avaitility.version>
     </properties>
 
diff --git a/core-java-modules/core-java-concurrency-basic/pom.xml b/core-java-modules/core-java-concurrency-basic/pom.xml
index 7212a2dcb1..1e3157291a 100644
--- a/core-java-modules/core-java-concurrency-basic/pom.xml
+++ b/core-java-modules/core-java-concurrency-basic/pom.xml
@@ -20,12 +20,6 @@
             <artifactId>commons-lang3</artifactId>
             <version>${commons-lang3.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>com.jayway.awaitility</groupId>
             <artifactId>awaitility</artifactId>
@@ -45,8 +39,6 @@
     </build>
 
     <properties>
-        <!-- testing -->
-        <assertj.version>3.6.1</assertj.version>
         <avaitility.version>1.7.0</avaitility.version>
     </properties>
 
diff --git a/core-java-modules/core-java-concurrency-collections-2/pom.xml b/core-java-modules/core-java-concurrency-collections-2/pom.xml
index 8de0e1bef7..02c046b2ea 100644
--- a/core-java-modules/core-java-concurrency-collections-2/pom.xml
+++ b/core-java-modules/core-java-concurrency-collections-2/pom.xml
@@ -29,18 +29,10 @@
             <artifactId>jmh-generator-annprocess</artifactId>
             <version>${jmh-generator.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <properties>
         <guava.version>28.2-jre</guava.version>
-        <!-- testing -->
-        <assertj.version>3.6.1</assertj.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-concurrency-collections/pom.xml b/core-java-modules/core-java-concurrency-collections/pom.xml
index f22da1c848..8b8d2fe03b 100644
--- a/core-java-modules/core-java-concurrency-collections/pom.xml
+++ b/core-java-modules/core-java-concurrency-collections/pom.xml
@@ -14,15 +14,6 @@
         <version>0.0.1-SNAPSHOT</version>
     </parent>
 
-    <dependencies>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
-    </dependencies>
-
     <build>
         <finalName>core-java-concurrency-collections</finalName>
         <resources>
@@ -33,9 +24,4 @@
         </resources>
     </build>
 
-    <properties>
-        <!-- testing -->
-        <assertj.version>3.6.1</assertj.version>
-    </properties>
-
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-date-operations-1/pom.xml b/core-java-modules/core-java-date-operations-1/pom.xml
index 8a13163ba4..ea9f94fa56 100644
--- a/core-java-modules/core-java-date-operations-1/pom.xml
+++ b/core-java-modules/core-java-date-operations-1/pom.xml
@@ -25,12 +25,7 @@
             <artifactId>commons-lang3</artifactId>
             <version>${commons-lang3.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
+
         <dependency>
             <groupId>com.darwinsys</groupId>
             <artifactId>hirondelle-date4j</artifactId>
@@ -62,8 +57,6 @@
 
     <properties>
         <joda-time.version>2.10</joda-time.version>
-        <!-- testing -->
-        <assertj.version>3.6.1</assertj.version>
         <hirondelle-date4j.version>RELEASE</hirondelle-date4j.version>
         <maven.compiler.source>1.9</maven.compiler.source>
         <maven.compiler.target>1.9</maven.compiler.target>
diff --git a/core-java-modules/core-java-date-operations-2/pom.xml b/core-java-modules/core-java-date-operations-2/pom.xml
index 1d283851ca..f60c7b7fc0 100644
--- a/core-java-modules/core-java-date-operations-2/pom.xml
+++ b/core-java-modules/core-java-date-operations-2/pom.xml
@@ -30,18 +30,11 @@
             <artifactId>hirondelle-date4j</artifactId>
             <version>${hirondelle-date4j.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <properties>
         <joda-time.version>2.10</joda-time.version>
         <hirondelle-date4j.version>1.5.1</hirondelle-date4j.version>
-        <assertj.version>3.14.0</assertj.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-datetime-conversion/pom.xml b/core-java-modules/core-java-datetime-conversion/pom.xml
index 8f082e2793..6e9aeaf5af 100644
--- a/core-java-modules/core-java-datetime-conversion/pom.xml
+++ b/core-java-modules/core-java-datetime-conversion/pom.xml
@@ -31,13 +31,6 @@
             <artifactId>log4j</artifactId>
             <version>${log4j.version}</version>
         </dependency>
-        <!-- test scoped -->
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <build>
@@ -63,8 +56,6 @@
 
     <properties>
         <joda-time.version>2.10</joda-time.version>
-        <!-- testing -->
-        <assertj.version>3.6.1</assertj.version>
         <maven.compiler.source>1.9</maven.compiler.source>
         <maven.compiler.target>1.9</maven.compiler.target>
     </properties>
diff --git a/core-java-modules/core-java-datetime-string/pom.xml b/core-java-modules/core-java-datetime-string/pom.xml
index a65659be71..2b3c2edb02 100644
--- a/core-java-modules/core-java-datetime-string/pom.xml
+++ b/core-java-modules/core-java-datetime-string/pom.xml
@@ -31,13 +31,6 @@
             <artifactId>log4j</artifactId>
             <version>${log4j.version}</version>
         </dependency>
-        <!-- test scoped -->
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>joda-time</groupId>
             <artifactId>joda-time</artifactId>
@@ -76,8 +69,6 @@
         <commons-validator.version>1.6</commons-validator.version>
         <joda-time.version>2.10.10</joda-time.version>
         <hirondelle-date4j.version>RELEASE</hirondelle-date4j.version>
-        <!-- testing -->
-        <assertj.version>3.6.1</assertj.version>
         <maven.compiler.source>1.9</maven.compiler.source>
         <maven.compiler.target>1.9</maven.compiler.target>
     </properties>
diff --git a/core-java-modules/core-java-exceptions-2/pom.xml b/core-java-modules/core-java-exceptions-2/pom.xml
index d952683a64..9103672cd4 100644
--- a/core-java-modules/core-java-exceptions-2/pom.xml
+++ b/core-java-modules/core-java-exceptions-2/pom.xml
@@ -15,13 +15,6 @@
     </parent>
 
     <dependencies>
-        <!-- test scoped -->
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-lang3</artifactId>
@@ -29,9 +22,4 @@
         </dependency>
     </dependencies>
 
-    <properties>
-        <!-- testing -->
-        <assertj-core.version>3.10.0</assertj-core.version>
-    </properties>
-
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-exceptions-3/pom.xml b/core-java-modules/core-java-exceptions-3/pom.xml
index ffc21799ce..18dc52932e 100644
--- a/core-java-modules/core-java-exceptions-3/pom.xml
+++ b/core-java-modules/core-java-exceptions-3/pom.xml
@@ -22,18 +22,9 @@
             <version>${h2.version}</version>
             <scope>test</scope>
         </dependency>
-        <!-- test scoped -->
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <properties>
-        <!-- testing -->
-        <assertj-core.version>3.10.0</assertj-core.version>
         <h2.version>1.4.191</h2.version>
     </properties>
 
diff --git a/core-java-modules/core-java-exceptions/pom.xml b/core-java-modules/core-java-exceptions/pom.xml
index d5581279b5..f1f60120a5 100644
--- a/core-java-modules/core-java-exceptions/pom.xml
+++ b/core-java-modules/core-java-exceptions/pom.xml
@@ -32,19 +32,10 @@
             <artifactId>commons-lang3</artifactId>
             <version>${commons-lang3.version}</version>
         </dependency>
-        <!-- test scoped -->
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <properties>
         <javax.mail.version>1.5.0-b01</javax.mail.version>
-        <!-- testing -->
-        <assertj-core.version>3.10.0</assertj-core.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-function/pom.xml b/core-java-modules/core-java-function/pom.xml
index cc44ba5a7c..a3add5a686 100644
--- a/core-java-modules/core-java-function/pom.xml
+++ b/core-java-modules/core-java-function/pom.xml
@@ -14,16 +14,6 @@
         <version>0.0.1-SNAPSHOT</version>
     </parent>
 
-    <dependencies>
-        <!-- test scoped -->
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
-    </dependencies>
-
     <build>
         <finalName>core-java-function</finalName>
         <resources>
@@ -34,9 +24,4 @@
         </resources>
     </build>
 
-    <properties>
-        <!-- testing -->
-        <assertj.version>3.6.1</assertj.version>
-    </properties>
-
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-io-2/pom.xml b/core-java-modules/core-java-io-2/pom.xml
index 924248f4f9..800756767c 100644
--- a/core-java-modules/core-java-io-2/pom.xml
+++ b/core-java-modules/core-java-io-2/pom.xml
@@ -38,13 +38,6 @@
             <artifactId>log4j-over-slf4j</artifactId>
             <version>${org.slf4j.version}</version>
         </dependency>
-        <!-- test scoped -->
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
         <!-- https://mvnrepository.com/artifact/com.github.tomakehurst/wiremock -->
         <dependency>
             <groupId>com.github.tomakehurst</groupId>
@@ -76,7 +69,6 @@
     </build>
 
     <properties>
-        <assertj.version>3.6.1</assertj.version>
         <maven-javadoc-plugin.version>3.0.0-M1</maven-javadoc-plugin.version>
         <wiremock.version>2.26.3</wiremock.version>
     </properties>
diff --git a/core-java-modules/core-java-io-3/pom.xml b/core-java-modules/core-java-io-3/pom.xml
index 017b56f03f..7af90dbab9 100644
--- a/core-java-modules/core-java-io-3/pom.xml
+++ b/core-java-modules/core-java-io-3/pom.xml
@@ -38,17 +38,6 @@
             <artifactId>log4j-over-slf4j</artifactId>
             <version>${org.slf4j.version}</version>
         </dependency>
-        <!-- test scoped -->
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
-    <properties>
-        <assertj.version>3.6.1</assertj.version>
-    </properties>
-
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-io-4/pom.xml b/core-java-modules/core-java-io-4/pom.xml
index 0501bb4a66..9fc00ff586 100644
--- a/core-java-modules/core-java-io-4/pom.xml
+++ b/core-java-modules/core-java-io-4/pom.xml
@@ -32,17 +32,6 @@
             <artifactId>log4j-over-slf4j</artifactId>
             <version>${org.slf4j.version}</version>
         </dependency>
-        <!-- test scoped -->
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
-    <properties>
-        <assertj.version>3.6.1</assertj.version>
-    </properties>
-
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-io-apis/pom.xml b/core-java-modules/core-java-io-apis/pom.xml
index f2a574ed89..fab2bff959 100644
--- a/core-java-modules/core-java-io-apis/pom.xml
+++ b/core-java-modules/core-java-io-apis/pom.xml
@@ -32,13 +32,6 @@
             <version>${lombok.version}</version>
             <scope>provided</scope>
         </dependency>
-        <!-- test scoped -->
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <build>
@@ -51,8 +44,4 @@
         </resources>
     </build>
 
-    <properties>
-        <assertj.version>3.6.1</assertj.version>
-    </properties>
-
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-io/pom.xml b/core-java-modules/core-java-io/pom.xml
index a036818226..7de29ac23c 100644
--- a/core-java-modules/core-java-io/pom.xml
+++ b/core-java-modules/core-java-io/pom.xml
@@ -15,13 +15,6 @@
     </parent>
 
     <dependencies>
-        <!-- test scoped -->
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.hsqldb</groupId>
             <artifactId>hsqldb</artifactId>
@@ -132,8 +125,6 @@
     </profiles>
 
     <properties>
-        <!-- testing -->
-        <assertj.version>3.6.1</assertj.version>
         <!-- maven plugins -->
         <maven-javadoc-plugin.version>3.0.0-M1</maven-javadoc-plugin.version>
         <hsqldb.version>2.4.0</hsqldb.version>
diff --git a/core-java-modules/core-java-jar/pom.xml b/core-java-modules/core-java-jar/pom.xml
index 3c5a1b35bf..da107c745f 100644
--- a/core-java-modules/core-java-jar/pom.xml
+++ b/core-java-modules/core-java-jar/pom.xml
@@ -49,13 +49,6 @@
             <version>${lombok.version}</version>
             <scope>provided</scope>
         </dependency>
-        <!-- test scoped -->
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.javamoney</groupId>
             <artifactId>moneta</artifactId>
@@ -376,8 +369,6 @@
         <!-- util -->
         <unix4j.version>0.4</unix4j.version>
         <grep4j.version>1.8.7</grep4j.version>
-        <!-- testing -->
-        <assertj-core.version>3.10.0</assertj-core.version>
         <!-- maven plugins -->
         <javamoney.moneta.version>1.1</javamoney.moneta.version>
         <maven-javadoc-plugin.version>3.0.0-M1</maven-javadoc-plugin.version>
diff --git a/core-java-modules/core-java-jndi/pom.xml b/core-java-modules/core-java-jndi/pom.xml
index f971623bc2..68b7f9361f 100644
--- a/core-java-modules/core-java-jndi/pom.xml
+++ b/core-java-modules/core-java-jndi/pom.xml
@@ -47,12 +47,6 @@
             <version>${apacheds.version}</version>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <build>
@@ -71,7 +65,6 @@
     <properties>
         <spring.version>5.0.9.RELEASE</spring.version>
         <h2.version>1.4.199</h2.version>
-        <assertj-core.version>3.21.0</assertj-core.version>
         <apacheds.version>2.0.0.AM26</apacheds.version>
         <source.version>1.8</source.version>
         <target.version>1.8</target.version>
diff --git a/core-java-modules/core-java-jvm-2/pom.xml b/core-java-modules/core-java-jvm-2/pom.xml
index b34aac5a78..60a2795116 100644
--- a/core-java-modules/core-java-jvm-2/pom.xml
+++ b/core-java-modules/core-java-jvm-2/pom.xml
@@ -15,12 +15,6 @@
     </parent>
 
     <dependencies>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.openjdk.jol</groupId>
             <artifactId>jol-core</artifactId>
@@ -39,7 +33,6 @@
     </dependencies>
 
     <properties>
-        <assertj.version>3.6.1</assertj.version>
         <jol-core.version>0.10</jol-core.version>
         <reflections.version>0.10.2</reflections.version>
         <guava.version>31.0.1-jre</guava.version>
diff --git a/core-java-modules/core-java-jvm/pom.xml b/core-java-modules/core-java-jvm/pom.xml
index 38cb1a7825..c47765e43d 100644
--- a/core-java-modules/core-java-jvm/pom.xml
+++ b/core-java-modules/core-java-jvm/pom.xml
@@ -20,12 +20,6 @@
             <artifactId>commons-lang3</artifactId>
             <version>${commons-lang3.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.javassist</groupId>
             <artifactId>javassist</artifactId>
@@ -66,8 +60,6 @@
     </dependencies>
 
     <properties>
-        <assertj.version>3.6.1</assertj.version>
-        <!-- instrumentation -->
         <javaassist.version>3.27.0-GA</javaassist.version>
         <sun.tools.version>1.8.0</sun.tools.version>
         <jol-core.version>0.10</jol-core.version>
diff --git a/core-java-modules/core-java-lang-2/pom.xml b/core-java-modules/core-java-lang-2/pom.xml
index d1a8d68075..f155f2abaf 100644
--- a/core-java-modules/core-java-lang-2/pom.xml
+++ b/core-java-modules/core-java-lang-2/pom.xml
@@ -45,12 +45,6 @@
             <artifactId>jmh-core</artifactId>
             <version>${jmh-core.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <build>
@@ -64,7 +58,6 @@
     </build>
 
     <properties>
-        <assertj.version>3.12.2</assertj.version>
         <commons.beanutils.version>1.9.4</commons.beanutils.version>
         <guava.version>29.0-jre</guava.version>
     </properties>
diff --git a/core-java-modules/core-java-lang-3/pom.xml b/core-java-modules/core-java-lang-3/pom.xml
index 0eda5dd16b..92c724826c 100644
--- a/core-java-modules/core-java-lang-3/pom.xml
+++ b/core-java-modules/core-java-lang-3/pom.xml
@@ -15,12 +15,6 @@
     </parent>
 
     <dependencies>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>com.google.guava</groupId>
             <artifactId>guava</artifactId>
@@ -45,8 +39,4 @@
         </resources>
     </build>
 
-    <properties>
-        <assertj.version>3.12.2</assertj.version>
-    </properties>
-
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-lang-math-2/pom.xml b/core-java-modules/core-java-lang-math-2/pom.xml
index 4411d313db..4057429896 100644
--- a/core-java-modules/core-java-lang-math-2/pom.xml
+++ b/core-java-modules/core-java-lang-math-2/pom.xml
@@ -44,12 +44,6 @@
             <artifactId>guava</artifactId>
             <version>${guava.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${org.assertj.core.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>com.github.dpaukov</groupId>
             <artifactId>combinatoricslib3</artifactId>
@@ -65,7 +59,6 @@
 
     <properties>
         <commons-math3.version>3.6.1</commons-math3.version>
-        <org.assertj.core.version>3.9.0</org.assertj.core.version>
         <guava.version>27.0.1-jre</guava.version>
         <combinatoricslib3.version>3.3.0</combinatoricslib3.version>
         <ejml.version>0.38</ejml.version>
diff --git a/core-java-modules/core-java-lang-math/pom.xml b/core-java-modules/core-java-lang-math/pom.xml
index 2cc9b90fa4..37550b67d8 100644
--- a/core-java-modules/core-java-lang-math/pom.xml
+++ b/core-java-modules/core-java-lang-math/pom.xml
@@ -14,16 +14,6 @@
         <version>0.0.1-SNAPSHOT</version>
     </parent>
 
-    <dependencies>
-        <!-- test scoped -->
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
-    </dependencies>
-
     <build>
         <finalName>core-java-lang-math</finalName>
         <resources>
@@ -34,9 +24,4 @@
         </resources>
     </build>
 
-    <properties>
-        <!-- testing -->
-        <assertj.version>3.6.1</assertj.version>
-    </properties>
-
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-lang-oop-constructors/pom.xml b/core-java-modules/core-java-lang-oop-constructors/pom.xml
index 5635059fa9..061b3c08de 100644
--- a/core-java-modules/core-java-lang-oop-constructors/pom.xml
+++ b/core-java-modules/core-java-lang-oop-constructors/pom.xml
@@ -13,17 +13,4 @@
         <version>0.0.1-SNAPSHOT</version>
     </parent>
 
-    <dependencies>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
-    </dependencies>
-
-    <properties>
-        <assertj-core.version>3.10.0</assertj-core.version>
-    </properties>
-
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-lang-oop-inheritance/pom.xml b/core-java-modules/core-java-lang-oop-inheritance/pom.xml
index e0272fb94e..4fc7e14d84 100644
--- a/core-java-modules/core-java-lang-oop-inheritance/pom.xml
+++ b/core-java-modules/core-java-lang-oop-inheritance/pom.xml
@@ -13,17 +13,4 @@
         <version>0.0.1-SNAPSHOT</version>
     </parent>
 
-    <dependencies>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
-    </dependencies>
-
-    <properties>
-        <assertj-core.version>3.10.0</assertj-core.version>
-    </properties>
-
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-lang-oop-methods/pom.xml b/core-java-modules/core-java-lang-oop-methods/pom.xml
index 938b457872..e57b51b7bd 100644
--- a/core-java-modules/core-java-lang-oop-methods/pom.xml
+++ b/core-java-modules/core-java-lang-oop-methods/pom.xml
@@ -24,12 +24,6 @@
             <artifactId>commons-lang</artifactId>
             <version>${commons-lang.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>nl.jqno.equalsverifier</groupId>
             <artifactId>equalsverifier</artifactId>
@@ -40,7 +34,6 @@
 
     <properties>
         <lombok.version>1.18.12</lombok.version>
-        <assertj-core.version>3.10.0</assertj-core.version>
         <equalsverifier.version>3.0.3</equalsverifier.version>
     </properties>
 
diff --git a/core-java-modules/core-java-lang-oop-modifiers/pom.xml b/core-java-modules/core-java-lang-oop-modifiers/pom.xml
index 70c70608eb..109a87c41e 100644
--- a/core-java-modules/core-java-lang-oop-modifiers/pom.xml
+++ b/core-java-modules/core-java-lang-oop-modifiers/pom.xml
@@ -14,12 +14,6 @@
     </parent>
 
     <dependencies>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>com.h2database</groupId>
             <artifactId>h2</artifactId>
@@ -28,8 +22,4 @@
         </dependency>
     </dependencies>
 
-    <properties>
-        <assertj-core.version>3.10.0</assertj-core.version>
-    </properties>
-
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-lang-oop-patterns/pom.xml b/core-java-modules/core-java-lang-oop-patterns/pom.xml
index 8b8b4a7b46..4b89584def 100644
--- a/core-java-modules/core-java-lang-oop-patterns/pom.xml
+++ b/core-java-modules/core-java-lang-oop-patterns/pom.xml
@@ -29,17 +29,10 @@
             <artifactId>gson</artifactId>
             <version>${gson.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <properties>
         <gson.version>2.8.2</gson.version>
-        <assertj-core.version>3.10.0</assertj-core.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-lang-operators-2/pom.xml b/core-java-modules/core-java-lang-operators-2/pom.xml
index 1779b7384c..724dad95ee 100644
--- a/core-java-modules/core-java-lang-operators-2/pom.xml
+++ b/core-java-modules/core-java-lang-operators-2/pom.xml
@@ -21,13 +21,6 @@
             <version>${lombok.version}</version>
             <scope>provided</scope>
         </dependency>
-        <!-- test scoped -->
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <build>
@@ -40,9 +33,4 @@
         </resources>
     </build>
 
-    <properties>
-        <!-- testing -->
-        <assertj-core.version>3.10.0</assertj-core.version>
-    </properties>
-
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-lang-operators/pom.xml b/core-java-modules/core-java-lang-operators/pom.xml
index 63f42917b8..c61fb81354 100644
--- a/core-java-modules/core-java-lang-operators/pom.xml
+++ b/core-java-modules/core-java-lang-operators/pom.xml
@@ -21,13 +21,6 @@
             <version>${lombok.version}</version>
             <scope>provided</scope>
         </dependency>
-        <!-- test scoped -->
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <build>
@@ -40,9 +33,4 @@
         </resources>
     </build>
 
-    <properties>
-        <!-- testing -->
-        <assertj-core.version>3.10.0</assertj-core.version>
-    </properties>
-
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-lang-syntax/pom.xml b/core-java-modules/core-java-lang-syntax/pom.xml
index da7d56de7b..7cdbc40fbc 100644
--- a/core-java-modules/core-java-lang-syntax/pom.xml
+++ b/core-java-modules/core-java-lang-syntax/pom.xml
@@ -26,13 +26,6 @@
             <artifactId>log4j-over-slf4j</artifactId>
             <version>${org.slf4j.version}</version>
         </dependency>
-        <!-- test scoped -->
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <build>
@@ -45,9 +38,4 @@
         </resources>
     </build>
 
-    <properties>
-        <!-- testing -->
-        <assertj-core.version>3.10.0</assertj-core.version>
-    </properties>
-
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-networking-3/pom.xml b/core-java-modules/core-java-networking-3/pom.xml
index 2fd97ef831..ee822e57cb 100644
--- a/core-java-modules/core-java-networking-3/pom.xml
+++ b/core-java-modules/core-java-networking-3/pom.xml
@@ -29,12 +29,6 @@
             <artifactId>tomcat-embed-core</artifactId>
             <version>${tomcat.embeded.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>com.sun.mail</groupId>
             <artifactId>javax.mail</artifactId>
@@ -76,7 +70,6 @@
         <spring.core.version>5.2.8.RELEASE</spring.core.version>
         <jetty.embeded.version>9.4.31.v20200723</jetty.embeded.version>
         <tomcat.embeded.version>10.0.0-M7</tomcat.embeded.version>
-        <assertj.version>3.11.1</assertj.version>
         <seancfoley.ipaddress.version>5.3.3</seancfoley.ipaddress.version>
         <jgonian.commons-ip-math.version>1.32</jgonian.commons-ip-math.version>
         <googlecode.ipv6.version>0.17</googlecode.ipv6.version>
diff --git a/core-java-modules/core-java-nio-2/pom.xml b/core-java-modules/core-java-nio-2/pom.xml
index 9d5e267b46..eb56c2bf68 100644
--- a/core-java-modules/core-java-nio-2/pom.xml
+++ b/core-java-modules/core-java-nio-2/pom.xml
@@ -14,17 +14,4 @@
         <version>0.0.1-SNAPSHOT</version>
     </parent>
 
-    <dependencies>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
-    </dependencies>
-
-    <properties>
-        <assertj.version>3.6.1</assertj.version>
-    </properties>
-
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-optional/pom.xml b/core-java-modules/core-java-optional/pom.xml
index dd5217df74..d04763598d 100644
--- a/core-java-modules/core-java-optional/pom.xml
+++ b/core-java-modules/core-java-optional/pom.xml
@@ -56,18 +56,11 @@
             <version>${rest-assured.version}</version>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <properties>
         <hibernate.core.version>5.4.0.Final</hibernate.core.version>
         <guava.version>27.1-jre</guava.version>
-        <assertj.version>3.10.0</assertj.version>
         <rest-assured.version>3.1.1</rest-assured.version>
     </properties>
 
diff --git a/core-java-modules/core-java-os/pom.xml b/core-java-modules/core-java-os/pom.xml
index c0eac46db8..970c8a562a 100644
--- a/core-java-modules/core-java-os/pom.xml
+++ b/core-java-modules/core-java-os/pom.xml
@@ -35,13 +35,6 @@
 			<artifactId>log4j</artifactId>
 			<version>${log4j.version}</version>
 		</dependency>
-		<!-- test scoped -->
-		<dependency>
-			<groupId>org.assertj</groupId>
-			<artifactId>assertj-core</artifactId>
-			<version>${assertj.version}</version>
-			<scope>test</scope>
-		</dependency>
 		<dependency>
 			<groupId>org.unix4j</groupId>
 			<artifactId>unix4j-command</artifactId>
@@ -76,11 +69,8 @@
     </build>
 
     <properties>
-        <!-- util -->
         <commons-collections4.version>4.1</commons-collections4.version>
         <collections-generic.version>4.01</collections-generic.version>
-        <!-- testing -->
-        <assertj.version>3.6.1</assertj.version>
         <asspectj.version>1.8.9</asspectj.version>
         <maven.compiler.source>1.9</maven.compiler.source>
         <maven.compiler.target>1.9</maven.compiler.target>
diff --git a/core-java-modules/core-java-reflection/pom.xml b/core-java-modules/core-java-reflection/pom.xml
index 32777e228f..1706bf3c45 100644
--- a/core-java-modules/core-java-reflection/pom.xml
+++ b/core-java-modules/core-java-reflection/pom.xml
@@ -14,14 +14,6 @@
         <version>0.0.1-SNAPSHOT</version>
     </parent>
 
-    <dependencies>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-        </dependency>
-    </dependencies>
-
     <build>
         <finalName>core-java-reflection</finalName>
         <resources>
@@ -45,7 +37,6 @@
     </build>
 
     <properties>
-        <assertj-core.version>3.10.0</assertj-core.version>
         <source.version>1.8</source.version>
         <target.version>1.8</target.version>
     </properties>
diff --git a/core-java-modules/core-java-regex-2/pom.xml b/core-java-modules/core-java-regex-2/pom.xml
index a47c0ff357..ae9385e63c 100644
--- a/core-java-modules/core-java-regex-2/pom.xml
+++ b/core-java-modules/core-java-regex-2/pom.xml
@@ -14,17 +14,4 @@
         <version>0.0.1-SNAPSHOT</version>
     </parent>
 
-    <dependencies>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
-    </dependencies>
-
-    <properties>
-        <assertj-core.version>3.15.0</assertj-core.version>
-    </properties>
-
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-regex/pom.xml b/core-java-modules/core-java-regex/pom.xml
index 3fb63fb42a..93f3ae3cdb 100644
--- a/core-java-modules/core-java-regex/pom.xml
+++ b/core-java-modules/core-java-regex/pom.xml
@@ -25,12 +25,6 @@
             <artifactId>jmh-generator-annprocess</artifactId>
             <version>${jmh-core.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <build>
@@ -43,8 +37,4 @@
         </resources>
     </build>
 
-    <properties>
-        <assertj-core.version>3.15.0</assertj-core.version>
-    </properties>
-
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-security-2/pom.xml b/core-java-modules/core-java-security-2/pom.xml
index 8de12c0c46..7a354ee9e2 100644
--- a/core-java-modules/core-java-security-2/pom.xml
+++ b/core-java-modules/core-java-security-2/pom.xml
@@ -25,13 +25,6 @@
             <artifactId>bcprov-jdk15on</artifactId>
             <version>${bouncycastle.version}</version>
         </dependency>
-        <!-- test scoped -->
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
         <!-- https://mvnrepository.com/artifact/javax.xml.bind/jaxb-api -->
         <dependency>
             <groupId>javax.xml.bind</groupId>
@@ -41,11 +34,8 @@
     </dependencies>
 
     <properties>
-        <!-- util -->
         <bouncycastle.version>1.60</bouncycastle.version>
         <commons-codec.version>1.11</commons-codec.version>
-        <!-- testing -->
-        <assertj-core.version>3.18.0</assertj-core.version>
         <jaxb-api.version>2.3.1</jaxb-api.version>
     </properties>
 
diff --git a/core-java-modules/core-java-security-3/pom.xml b/core-java-modules/core-java-security-3/pom.xml
index a0e73a1e29..3cd546e697 100644
--- a/core-java-modules/core-java-security-3/pom.xml
+++ b/core-java-modules/core-java-security-3/pom.xml
@@ -25,13 +25,6 @@
             <artifactId>bcprov-jdk15on</artifactId>
             <version>${bouncycastle.version}</version>
         </dependency>
-        <!-- test scoped -->
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
         <!-- https://mvnrepository.com/artifact/javax.xml.bind/jaxb-api -->
         <dependency>
             <groupId>javax.xml.bind</groupId>
@@ -41,11 +34,8 @@
     </dependencies>
 
     <properties>
-        <!-- util -->
         <bouncycastle.version>1.60</bouncycastle.version>
         <commons-codec.version>1.11</commons-codec.version>
-        <!-- testing -->
-        <assertj-core.version>3.18.0</assertj-core.version>
         <jaxb-api.version>2.3.1</jaxb-api.version>
     </properties>
 
diff --git a/core-java-modules/core-java-security-algorithms/pom.xml b/core-java-modules/core-java-security-algorithms/pom.xml
index db1bf09ead..967ddc103e 100644
--- a/core-java-modules/core-java-security-algorithms/pom.xml
+++ b/core-java-modules/core-java-security-algorithms/pom.xml
@@ -25,13 +25,6 @@
             <artifactId>bcprov-jdk15on</artifactId>
             <version>${bouncycastle.version}</version>
         </dependency>
-        <!-- test scoped -->
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
         <!-- https://mvnrepository.com/artifact/javax.xml.bind/jaxb-api -->
         <dependency>
             <groupId>javax.xml.bind</groupId>
@@ -41,11 +34,8 @@
     </dependencies>
 
     <properties>
-        <!-- util -->
         <bouncycastle.version>1.60</bouncycastle.version>
         <commons-codec.version>1.11</commons-codec.version>
-        <!-- testing -->
-        <assertj-core.version>3.18.0</assertj-core.version>
         <jaxb-api.version>2.3.1</jaxb-api.version>
     </properties>
 
diff --git a/core-java-modules/core-java-security/pom.xml b/core-java-modules/core-java-security/pom.xml
index daba990776..b36de5ac4c 100644
--- a/core-java-modules/core-java-security/pom.xml
+++ b/core-java-modules/core-java-security/pom.xml
@@ -14,19 +14,4 @@
         <version>0.0.1-SNAPSHOT</version>
     </parent>
 
-    <dependencies>
-        <!-- test scoped -->
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
-    </dependencies>
-
-    <properties>
-        <!-- testing -->
-        <assertj-core.version>3.10.0</assertj-core.version>
-    </properties>
-
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-serialization/pom.xml b/core-java-modules/core-java-serialization/pom.xml
index 754dcd434b..0ce5785fd9 100644
--- a/core-java-modules/core-java-serialization/pom.xml
+++ b/core-java-modules/core-java-serialization/pom.xml
@@ -43,13 +43,6 @@
             <artifactId>log4j-over-slf4j</artifactId>
             <version>${org.slf4j.version}</version>
         </dependency>
-        <!-- test scoped -->
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-core</artifactId>
@@ -177,16 +170,10 @@
     </profiles>
 
     <properties>
-        <!-- util -->
         <unix4j.version>0.4</unix4j.version>
         <grep4j.version>1.8.7</grep4j.version>
-        <!-- testing -->
-        <assertj-core.version>3.10.0</assertj-core.version>
-        <!-- maven plugins -->
         <javamoney.moneta.version>1.1</javamoney.moneta.version>
         <maven-javadoc-plugin.version>3.0.0-M1</maven-javadoc-plugin.version>
-<!--        <source.version>1.8</source.version>-->
-<!--        <target.version>1.8</target.version>-->
         <spring.core.version>4.3.20.RELEASE</spring.core.version>
     </properties>
 
diff --git a/core-java-modules/core-java-streams-2/pom.xml b/core-java-modules/core-java-streams-2/pom.xml
index 08b82bcc11..c8fa83c55a 100644
--- a/core-java-modules/core-java-streams-2/pom.xml
+++ b/core-java-modules/core-java-streams-2/pom.xml
@@ -30,18 +30,11 @@
             <artifactId>log4j</artifactId>
             <version>${log4j.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <properties>
         <maven.compiler.source>1.9</maven.compiler.source>
         <maven.compiler.target>1.9</maven.compiler.target>
-        <assertj.version>3.11.1</assertj.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-streams-3/pom.xml b/core-java-modules/core-java-streams-3/pom.xml
index 6ace96fc4d..c2dfdc392b 100644
--- a/core-java-modules/core-java-streams-3/pom.xml
+++ b/core-java-modules/core-java-streams-3/pom.xml
@@ -37,13 +37,6 @@
             <version>${jmh-generator.version}</version>
             <scope>test</scope>
         </dependency>
-        <!-- test scoped -->
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <build>
@@ -75,8 +68,6 @@
 
     <properties>
         <lombok.version>1.18.20</lombok.version>
-        <!-- testing -->
-        <assertj.version>3.6.1</assertj.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-streams/pom.xml b/core-java-modules/core-java-streams/pom.xml
index 4862672c8a..a6bb827e77 100644
--- a/core-java-modules/core-java-streams/pom.xml
+++ b/core-java-modules/core-java-streams/pom.xml
@@ -43,13 +43,6 @@
             <version>${lombok.version}</version>
             <scope>provided</scope>
         </dependency>
-        <!-- test scoped -->
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>com.codepoetics</groupId>
             <artifactId>protonpack</artifactId>
@@ -105,14 +98,11 @@
     </build>
 
     <properties>
-        <!-- util -->
         <vavr.version>0.9.0</vavr.version>
         <protonpack.version>1.15</protonpack.version>
         <streamex.version>0.6.5</streamex.version>
         <joda.version>2.10</joda.version>
         <throwing-function.version>1.3</throwing-function.version>
-        <!-- testing -->
-        <assertj.version>3.11.1</assertj.version>
         <asspectj.version>1.8.9</asspectj.version>
         <maven-compiler-plugin.version>3.1</maven-compiler-plugin.version>
         <maven.compiler.source>1.8</maven.compiler.source>
diff --git a/core-java-modules/core-java-string-algorithms-2/pom.xml b/core-java-modules/core-java-string-algorithms-2/pom.xml
index 4b0d55508f..9fbe10865d 100644
--- a/core-java-modules/core-java-string-algorithms-2/pom.xml
+++ b/core-java-modules/core-java-string-algorithms-2/pom.xml
@@ -35,12 +35,6 @@
             <artifactId>jmh-generator-annprocess</artifactId>
             <version>${jmh-generator.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.bitbucket.cowwoc</groupId>
             <artifactId>diff-match-patch</artifactId>
@@ -60,7 +54,6 @@
     </build>
 
     <properties>
-        <assertj.version>3.6.1</assertj.version>
         <diff-match-path.version>1.2</diff-match-path.version>
     </properties>
 
diff --git a/core-java-modules/core-java-string-algorithms-3/pom.xml b/core-java-modules/core-java-string-algorithms-3/pom.xml
index 88a3029cf1..6700e9ba95 100644
--- a/core-java-modules/core-java-string-algorithms-3/pom.xml
+++ b/core-java-modules/core-java-string-algorithms-3/pom.xml
@@ -14,13 +14,6 @@
     </parent>
 
     <dependencies>
-        <!-- test scoped -->
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>com.google.guava</groupId>
             <artifactId>guava</artifactId>
@@ -56,7 +49,6 @@
     </build>
 
     <properties>
-        <assertj.version>3.6.1</assertj.version>
         <guava.version>28.1-jre</guava.version>
         <validator.version>1.7</validator.version>
     </properties>
diff --git a/core-java-modules/core-java-string-algorithms/pom.xml b/core-java-modules/core-java-string-algorithms/pom.xml
index 9fea569b29..07018c7694 100644
--- a/core-java-modules/core-java-string-algorithms/pom.xml
+++ b/core-java-modules/core-java-string-algorithms/pom.xml
@@ -45,12 +45,6 @@
             <artifactId>emoji-java</artifactId>
             <version>${emoji-java.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <build>
@@ -66,7 +60,6 @@
     <properties>
         <guava.version>27.0.1-jre</guava.version>
         <ahocorasick.version>0.4.0</ahocorasick.version>
-        <assertj.version>3.6.1</assertj.version>
         <emoji-java.version>4.0.0</emoji-java.version>
     </properties>
 
diff --git a/core-java-modules/core-java-string-conversions-2/pom.xml b/core-java-modules/core-java-string-conversions-2/pom.xml
index 3e03f4c016..f97443d9ca 100644
--- a/core-java-modules/core-java-string-conversions-2/pom.xml
+++ b/core-java-modules/core-java-string-conversions-2/pom.xml
@@ -41,12 +41,6 @@
             <artifactId>commons-text</artifactId>
             <version>${commons-text.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <build>
@@ -61,7 +55,6 @@
     
     <properties>
         <icu.version>64.2</icu.version>
-        <assertj.version>3.12.2</assertj.version>
         <commons-text.version>1.9</commons-text.version>
         <guava.version>30.1.1-jre</guava.version>
     </properties>
diff --git a/core-java-modules/core-java-string-conversions/pom.xml b/core-java-modules/core-java-string-conversions/pom.xml
index 1047e3e7c3..148f04101f 100644
--- a/core-java-modules/core-java-string-conversions/pom.xml
+++ b/core-java-modules/core-java-string-conversions/pom.xml
@@ -35,13 +35,6 @@
             <artifactId>guava</artifactId>
             <version>${guava.version}</version>
         </dependency>
-        <!-- test scoped -->
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.hamcrest</groupId>
             <artifactId>hamcrest</artifactId>
@@ -62,7 +55,6 @@
 
     <properties>
         <icu4j.version>61.1</icu4j.version>
-        <assertj.version>3.6.1</assertj.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-string-operations-2/pom.xml b/core-java-modules/core-java-string-operations-2/pom.xml
index db8f78da70..0d31486759 100644
--- a/core-java-modules/core-java-string-operations-2/pom.xml
+++ b/core-java-modules/core-java-string-operations-2/pom.xml
@@ -66,12 +66,6 @@
             <artifactId>commons-codec</artifactId>
             <version>${commons-codec.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <build>
@@ -108,7 +102,6 @@
     </build>
 
     <properties>
-        <assertj.version>3.6.1</assertj.version>
         <validation-api.version>2.0.0.Final</validation-api.version>
         <guava.version>28.2-jre</guava.version>
         <hibernate-validator.version>6.0.2.Final</hibernate-validator.version>
diff --git a/core-java-modules/core-java-string-operations-3/pom.xml b/core-java-modules/core-java-string-operations-3/pom.xml
index 2567f776b1..1b1237a8c3 100644
--- a/core-java-modules/core-java-string-operations-3/pom.xml
+++ b/core-java-modules/core-java-string-operations-3/pom.xml
@@ -26,12 +26,6 @@
             <artifactId>commons-lang3</artifactId>
             <version>${apache-commons-lang3.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.apache.maven</groupId>
             <artifactId>maven-artifact</artifactId>
@@ -82,7 +76,6 @@
     <properties>
         <maven.compiler.source>11</maven.compiler.source>
         <maven.compiler.target>11</maven.compiler.target>
-        <assertj.version>3.6.1</assertj.version>
         <spring-core.version>5.3.9</spring-core.version>
         <apache-commons-lang3.version>3.12.0</apache-commons-lang3.version>
         <guava.version>31.0.1-jre</guava.version>
diff --git a/core-java-modules/core-java-string-operations-4/pom.xml b/core-java-modules/core-java-string-operations-4/pom.xml
index ce6119cbbe..da1180b176 100644
--- a/core-java-modules/core-java-string-operations-4/pom.xml
+++ b/core-java-modules/core-java-string-operations-4/pom.xml
@@ -16,12 +16,6 @@
     </parent>
 
     <dependencies>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>com.google.guava</groupId>
             <artifactId>guava</artifactId>
@@ -60,7 +54,6 @@
     <properties>
         <maven.compiler.source>11</maven.compiler.source>
         <maven.compiler.target>11</maven.compiler.target>
-        <assertj.version>3.6.1</assertj.version>
         <guava.version>31.0.1-jre</guava.version>
         <opencsv.version>4.1</opencsv.version>
         <spring-core.version>5.3.13</spring-core.version>
diff --git a/core-java-modules/core-java-string-operations/pom.xml b/core-java-modules/core-java-string-operations/pom.xml
index 67ce43277e..20e4df3ba3 100644
--- a/core-java-modules/core-java-string-operations/pom.xml
+++ b/core-java-modules/core-java-string-operations/pom.xml
@@ -40,12 +40,6 @@
             <artifactId>commons-codec</artifactId>
             <version>${commons-codec.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <build>
@@ -59,7 +53,6 @@
     </build>
 
     <properties>
-        <assertj.version>3.6.1</assertj.version>
         <commons-codec.version>1.15</commons-codec.version>
     </properties>
 
diff --git a/core-java-modules/core-java-strings/pom.xml b/core-java-modules/core-java-strings/pom.xml
index aca0bb3346..d78cb7b92d 100644
--- a/core-java-modules/core-java-strings/pom.xml
+++ b/core-java-modules/core-java-strings/pom.xml
@@ -36,12 +36,6 @@
             <artifactId>icu4j</artifactId>
             <version>${icu4j.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <build>
@@ -55,7 +49,6 @@
     </build>
 
     <properties>
-        <assertj.version>3.6.1</assertj.version>
         <icu4j.version>61.1</icu4j.version>
         <maven.compiler.release>15</maven.compiler.release>
     </properties>
diff --git a/core-java-modules/core-java-sun/pom.xml b/core-java-modules/core-java-sun/pom.xml
index 4c26b59168..e959932235 100644
--- a/core-java-modules/core-java-sun/pom.xml
+++ b/core-java-modules/core-java-sun/pom.xml
@@ -15,13 +15,6 @@
     </parent>
 
     <dependencies>
-        <!-- test scoped -->
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>com.sun</groupId>
             <artifactId>tools</artifactId>
@@ -93,10 +86,7 @@
     </profiles>
 
     <properties>
-        <!-- testing -->
-        <assertj.version>3.6.1</assertj.version>
         <avaitility.version>1.7.0</avaitility.version>
-        <!-- maven plugins -->
         <sun-tools.version>1.8.0</sun-tools.version>
     </properties>
 
diff --git a/core-java-modules/core-java-time-measurements/pom.xml b/core-java-modules/core-java-time-measurements/pom.xml
index d3c351b385..e2924b5278 100644
--- a/core-java-modules/core-java-time-measurements/pom.xml
+++ b/core-java-modules/core-java-time-measurements/pom.xml
@@ -27,13 +27,6 @@
             <version>${lombok.version}</version>
             <scope>provided</scope>
         </dependency>
-        <!-- test scoped -->
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>joda-time</groupId>
             <artifactId>joda-time</artifactId>
@@ -87,12 +80,9 @@
     </build>
 
     <properties>
-        <!-- util -->
         <commons-math3.version>3.6.1</commons-math3.version>
         <joda.version>2.10</joda.version>
         <lombok.version>1.18.12</lombok.version>
-        <!-- testing -->
-        <assertj.version>3.6.1</assertj.version>
         <asspectj.version>1.8.9</asspectj.version>
         <powermock.version>2.0.7</powermock.version>
         <jmockit.version>1.44</jmockit.version>
diff --git a/core-java-modules/core-java-uuid/pom.xml b/core-java-modules/core-java-uuid/pom.xml
index a38306f269..983d0f2ba3 100644
--- a/core-java-modules/core-java-uuid/pom.xml
+++ b/core-java-modules/core-java-uuid/pom.xml
@@ -25,12 +25,6 @@
             <artifactId>log4j-over-slf4j</artifactId>
             <version>${org.slf4j.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <build>
@@ -147,7 +141,6 @@
     </profiles>
 
     <properties>
-        <assertj-core.version>3.10.0</assertj-core.version>
         <maven-javadoc-plugin.version>3.0.0-M1</maven-javadoc-plugin.version>
     </properties>
 
diff --git a/core-java-modules/core-java/pom.xml b/core-java-modules/core-java/pom.xml
index 42262be29a..8d6921b493 100644
--- a/core-java-modules/core-java/pom.xml
+++ b/core-java-modules/core-java/pom.xml
@@ -49,13 +49,6 @@
             <version>${lombok.version}</version>
             <scope>provided</scope>
         </dependency>
-        <!-- test scoped -->
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.javamoney</groupId>
             <artifactId>moneta</artifactId>
@@ -185,8 +178,6 @@
         <!-- util -->
         <unix4j.version>0.4</unix4j.version>
         <grep4j.version>1.8.7</grep4j.version>
-        <!-- testing -->
-        <assertj-core.version>3.10.0</assertj-core.version>
         <!-- maven plugins -->
         <javamoney.moneta.version>1.1</javamoney.moneta.version>
         <maven-javadoc-plugin.version>3.0.0-M1</maven-javadoc-plugin.version>
diff --git a/core-java-modules/multimodulemavenproject/pom.xml b/core-java-modules/multimodulemavenproject/pom.xml
index 79d884cd86..fbafa7ebff 100644
--- a/core-java-modules/multimodulemavenproject/pom.xml
+++ b/core-java-modules/multimodulemavenproject/pom.xml
@@ -23,17 +23,6 @@
         <module>mainappmodule</module>
     </modules>
 
-    <dependencyManagement>
-        <dependencies>
-            <dependency>
-                <groupId>org.assertj</groupId>
-                <artifactId>assertj-core</artifactId>
-                <version>${assertj-core.version}</version>
-                <scope>test</scope>
-            </dependency>
-        </dependencies>
-    </dependencyManagement>
-
     <build>
         <pluginManagement>
             <plugins>
@@ -54,7 +43,6 @@
         <compiler.plugin.version>3.8.0</compiler.plugin.version>
         <source.version>1.9</source.version>
         <target.version>1.9</target.version>
-        <assertj-core.version>3.12.2</assertj-core.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/ddd-modules/pom.xml b/ddd-modules/pom.xml
index fe3aaf1160..134a9d0566 100644
--- a/ddd-modules/pom.xml
+++ b/ddd-modules/pom.xml
@@ -39,12 +39,6 @@
                 <version>${junit-jupiter.version}</version>
                 <scope>test</scope>
             </dependency>
-            <dependency>
-                <groupId>org.assertj</groupId>
-                <artifactId>assertj-core</artifactId>
-                <version>${assertj-core.version}</version>
-                <scope>test</scope>
-            </dependency>
         </dependencies>
     </dependencyManagement>
 
@@ -80,8 +74,6 @@
         <compiler.plugin.version>3.8.1</compiler.plugin.version>
 
         <appmodules.version>1.0</appmodules.version>
-
-        <assertj-core.version>3.12.2</assertj-core.version>
     </properties>
 
 </project>
diff --git a/guava-modules/guava-collections-list/pom.xml b/guava-modules/guava-collections-list/pom.xml
index 30d684d673..1b989e79b0 100644
--- a/guava-modules/guava-collections-list/pom.xml
+++ b/guava-modules/guava-collections-list/pom.xml
@@ -26,13 +26,6 @@
             <version>${commons-lang3.version}</version>
         </dependency>
         <!-- test scoped -->
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
-        <!-- https://mvnrepository.com/artifact/org.hamcrest/java-hamcrest -->
         <dependency>
             <groupId>org.hamcrest</groupId>
             <artifactId>java-hamcrest</artifactId>
@@ -55,7 +48,6 @@
         <!-- util -->
         <commons-collections4.version>4.1</commons-collections4.version>
         <!-- testing -->
-        <assertj.version>3.6.1</assertj.version>
         <java-hamcrest.version>2.0.0.0</java-hamcrest.version>
     </properties>
 
diff --git a/guava-modules/guava-collections-set/pom.xml b/guava-modules/guava-collections-set/pom.xml
index bd58645adc..49bfc46ee2 100644
--- a/guava-modules/guava-collections-set/pom.xml
+++ b/guava-modules/guava-collections-set/pom.xml
@@ -13,23 +13,8 @@
         <version>0.0.1-SNAPSHOT</version>
     </parent>
 
-    <dependencies>
-        <!-- test scoped -->
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
-    </dependencies>
-
     <build>
         <finalName>guava-collections-set</finalName>
     </build>
 
-    <properties>
-        <!-- testing -->
-        <assertj.version>3.6.1</assertj.version>
-    </properties>
-
 </project>
\ No newline at end of file
diff --git a/guava-modules/guava-collections/pom.xml b/guava-modules/guava-collections/pom.xml
index 91e3efcd8c..7929283616 100644
--- a/guava-modules/guava-collections/pom.xml
+++ b/guava-modules/guava-collections/pom.xml
@@ -31,13 +31,6 @@
             <version>${jool.version}</version>
         </dependency>
         <!-- test scoped -->
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
-        <!-- https://mvnrepository.com/artifact/org.hamcrest/java-hamcrest -->
         <dependency>
             <groupId>org.hamcrest</groupId>
             <artifactId>java-hamcrest</artifactId>
@@ -61,7 +54,6 @@
         <commons-collections4.version>4.1</commons-collections4.version>
         <jool.version>0.9.12</jool.version>
         <!-- testing -->
-        <assertj.version>3.6.1</assertj.version>
         <java-hamcrest.version>2.0.0.0</java-hamcrest.version>
     </properties>
 
diff --git a/guava-modules/guava-core/pom.xml b/guava-modules/guava-core/pom.xml
index 2540ac97a7..dd68fef43a 100644
--- a/guava-modules/guava-core/pom.xml
+++ b/guava-modules/guava-core/pom.xml
@@ -19,13 +19,6 @@
             <artifactId>commons-lang3</artifactId>
             <version>${commons-lang3.version}</version>
         </dependency>
-        <!-- test scoped -->
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <build>
@@ -38,9 +31,4 @@
         </resources>
     </build>
 
-    <properties>
-        <!-- testing -->
-        <assertj.version>3.6.1</assertj.version>
-    </properties>
-
 </project>
\ No newline at end of file
diff --git a/guava-modules/guava-utilities/pom.xml b/guava-modules/guava-utilities/pom.xml
index debf014ac7..ab849072a5 100644
--- a/guava-modules/guava-utilities/pom.xml
+++ b/guava-modules/guava-utilities/pom.xml
@@ -19,13 +19,6 @@
             <artifactId>commons-lang3</artifactId>
             <version>${commons-lang3.version}</version>
         </dependency>
-        <!-- test scoped -->
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <build>
@@ -38,9 +31,4 @@
         </resources>
     </build>
 
-    <properties>
-        <!-- testing -->
-        <assertj.version>3.6.1</assertj.version>
-    </properties>
-
 </project>
\ No newline at end of file
diff --git a/guest/core-java/pom.xml b/guest/core-java/pom.xml
index aaf67fd27e..2ab067ad40 100644
--- a/guest/core-java/pom.xml
+++ b/guest/core-java/pom.xml
@@ -20,17 +20,10 @@
             <artifactId>log4j-core</artifactId>
             <version>${log4j2.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <properties>
         <log4j2.version>2.8.2</log4j2.version>
-        <assertj.version>3.6.1</assertj.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/immutables/pom.xml b/immutables/pom.xml
index 648166fd74..7704cddbb6 100644
--- a/immutables/pom.xml
+++ b/immutables/pom.xml
@@ -18,12 +18,6 @@
             <artifactId>value</artifactId>
             <version>${immutables.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.mutabilitydetector</groupId>
             <artifactId>MutabilityDetector</artifactId>
@@ -34,7 +28,6 @@
 
     <properties>
         <immutables.version>2.5.6</immutables.version>
-        <assertj.version>3.6.1</assertj.version>
         <mutabilitydetector.version>0.9.6</mutabilitydetector.version>
     </properties>
 
diff --git a/jackson-modules/jackson-annotations/pom.xml b/jackson-modules/jackson-annotations/pom.xml
index bdc131c867..56fd6cf2fa 100644
--- a/jackson-modules/jackson-annotations/pom.xml
+++ b/jackson-modules/jackson-annotations/pom.xml
@@ -25,12 +25,6 @@
             <version>${rest-assured.version}</version>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <build>
@@ -44,7 +38,6 @@
     </build>
 
     <properties>
-        <assertj.version>3.11.0</assertj.version>
         <rest-assured.version>3.1.1</rest-assured.version>
     </properties>
 
diff --git a/jackson-modules/jackson-conversions-2/pom.xml b/jackson-modules/jackson-conversions-2/pom.xml
index a498c8b4f8..7e994fb52b 100644
--- a/jackson-modules/jackson-conversions-2/pom.xml
+++ b/jackson-modules/jackson-conversions-2/pom.xml
@@ -32,12 +32,6 @@
             <artifactId>jackson-dataformat-csv</artifactId>
             <version>${jackson.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <build>
@@ -50,8 +44,4 @@
         </resources>
     </build>
 
-    <properties>
-        <assertj.version>3.11.0</assertj.version>
-    </properties>
-
 </project>
\ No newline at end of file
diff --git a/jackson-modules/jackson/pom.xml b/jackson-modules/jackson/pom.xml
index a4aecfa3de..9df0f40874 100644
--- a/jackson-modules/jackson/pom.xml
+++ b/jackson-modules/jackson/pom.xml
@@ -48,12 +48,6 @@
             <version>${rest-assured.version}</version>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <build>
@@ -69,7 +63,6 @@
     <properties>
         <!-- testing -->
         <rest-assured.version>3.1.1</rest-assured.version>
-        <assertj.version>3.11.0</assertj.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/jackson-simple/pom.xml b/jackson-simple/pom.xml
index ae8e380b33..f71cb1ffbf 100644
--- a/jackson-simple/pom.xml
+++ b/jackson-simple/pom.xml
@@ -21,13 +21,6 @@
             <artifactId>jackson-dataformat-xml</artifactId>
             <version>${jackson.version}</version>
         </dependency>
-        <!-- test scoped -->
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <build>
@@ -40,9 +33,4 @@
         </resources>
     </build>
 
-    <properties>
-        <!-- testing -->
-        <assertj.version>3.11.0</assertj.version>
-    </properties>
-
 </project>
\ No newline at end of file
diff --git a/java-collections-conversions-2/pom.xml b/java-collections-conversions-2/pom.xml
index cd4366e87c..694b416169 100644
--- a/java-collections-conversions-2/pom.xml
+++ b/java-collections-conversions-2/pom.xml
@@ -16,12 +16,6 @@
     </parent>
 
     <dependencies>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>3.17.2</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-lang3</artifactId>
diff --git a/java-collections-maps-3/pom.xml b/java-collections-maps-3/pom.xml
index 0cdf24e31b..6f724ab5ef 100644
--- a/java-collections-maps-3/pom.xml
+++ b/java-collections-maps-3/pom.xml
@@ -22,12 +22,6 @@
             <version>${spring.version}</version>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-collections4</artifactId>
@@ -37,7 +31,6 @@
 
     <properties>
         <commons-collections4.version>4.1</commons-collections4.version>
-        <assertj.version>3.6.1</assertj.version>
         <spring.version>5.2.5.RELEASE</spring.version>
     </properties>
 
diff --git a/java-numbers-3/pom.xml b/java-numbers-3/pom.xml
index e8e080c4c0..68c2ac98de 100644
--- a/java-numbers-3/pom.xml
+++ b/java-numbers-3/pom.xml
@@ -30,12 +30,6 @@
             <version>${commons-lang3.version}</version>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <build>
@@ -51,7 +45,6 @@
     <properties>
         <dsiutils.version>2.6.0</dsiutils.version>
         <vavr.version>0.10.2</vavr.version>
-        <assertj.version>3.6.1</assertj.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/java-numbers-4/pom.xml b/java-numbers-4/pom.xml
index dbd6ac456a..9b2e799840 100644
--- a/java-numbers-4/pom.xml
+++ b/java-numbers-4/pom.xml
@@ -25,12 +25,6 @@
             <version>${commons-lang3.version}</version>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <build>
@@ -45,7 +39,6 @@
 
     <properties>
         <vavr.version>0.10.2</vavr.version>
-        <assertj.version>3.6.1</assertj.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/java-numbers/pom.xml b/java-numbers/pom.xml
index 8bab655f73..c06bc48c5d 100644
--- a/java-numbers/pom.xml
+++ b/java-numbers/pom.xml
@@ -31,12 +31,6 @@
             <artifactId>decimal4j</artifactId>
             <version>${decimal4j.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <build>
@@ -51,7 +45,6 @@
 
     <properties>
         <decimal4j.version>1.0.3</decimal4j.version>
-        <assertj.version>3.6.1</assertj.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/javax-servlets/pom.xml b/javax-servlets/pom.xml
index f1677050cf..1dc58aa917 100644
--- a/javax-servlets/pom.xml
+++ b/javax-servlets/pom.xml
@@ -16,12 +16,6 @@
     </parent>
 
     <dependencies>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
         <!-- File Uploading -->
         <dependency>
             <groupId>commons-fileupload</groupId>
@@ -56,7 +50,6 @@
     <properties>
         <org.apache.httpcomponents.version>4.5.3</org.apache.httpcomponents.version>
         <gson.version>2.8.2</gson.version>
-        <assertj.version>3.9.1</assertj.version>
         <javax.servlet-api.version>4.0.1</javax.servlet-api.version>
     </properties>
 
diff --git a/javaxval/pom.xml b/javaxval/pom.xml
index f0093e0aa4..57369c6f52 100644
--- a/javaxval/pom.xml
+++ b/javaxval/pom.xml
@@ -34,19 +34,12 @@
             <artifactId>spring-test</artifactId>
             <version>${org.springframework.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <properties>
         <hibernate-validator.version>6.0.13.Final</hibernate-validator.version>
         <javax.el.version>3.0.0</javax.el.version>
         <org.springframework.version>5.0.2.RELEASE</org.springframework.version>
-        <assertj.version>3.11.1</assertj.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/jjwt/pom.xml b/jjwt/pom.xml
index 4c194f9285..cc169ba9fc 100644
--- a/jjwt/pom.xml
+++ b/jjwt/pom.xml
@@ -38,11 +38,6 @@
             <artifactId>jjwt</artifactId>
             <version>${jjwt.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <properties>
diff --git a/json-2/pom.xml b/json-2/pom.xml
index b4301c41e5..591b7c0883 100644
--- a/json-2/pom.xml
+++ b/json-2/pom.xml
@@ -24,12 +24,6 @@
             <artifactId>jsoniter</artifactId>
             <version>${jsoniter.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>com.squareup.moshi</groupId>
             <artifactId>moshi</artifactId>
@@ -147,7 +141,6 @@
 
     <properties>
         <jsoniter.version>0.9.23</jsoniter.version>
-        <assertj-core.version>3.11.1</assertj-core.version>
         <moshi.version>1.9.2</moshi.version>
     </properties>
 
diff --git a/json/pom.xml b/json/pom.xml
index 260b2d1ad9..2919a3a4ee 100644
--- a/json/pom.xml
+++ b/json/pom.xml
@@ -68,12 +68,6 @@
             <version>${commons-collections4.version}</version>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <properties>
@@ -85,7 +79,6 @@
         <json.version>20171018</json.version>
         <gson.version>2.8.5</gson.version>
         <javax.version>1.1.2</javax.version>
-        <assertj-core.version>3.11.1</assertj-core.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/ksqldb/pom.xml b/ksqldb/pom.xml
index 2f92419d6e..ee4906090f 100644
--- a/ksqldb/pom.xml
+++ b/ksqldb/pom.xml
@@ -39,12 +39,6 @@
             <version>${awaitility.version}</version>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.testcontainers</groupId>
             <artifactId>testcontainers</artifactId>
@@ -61,7 +55,6 @@
 
     <properties>
         <ksqldb.version>6.2.0</ksqldb.version>
-        <assertj.version>3.20.2</assertj.version>
         <awaitility.version>4.1.0</awaitility.version>
         <testcontainers.version>1.15.3</testcontainers.version>
     </properties>
diff --git a/language-interop/pom.xml b/language-interop/pom.xml
index f2b0a08969..57dd8bdd9a 100644
--- a/language-interop/pom.xml
+++ b/language-interop/pom.xml
@@ -24,12 +24,6 @@
             <artifactId>commons-exec</artifactId>
             <version>${commons-exec.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <build>
@@ -49,7 +43,6 @@
     <properties>
         <jython.version>2.7.2</jython.version>
         <commons-exec.version>1.3</commons-exec.version>
-        <assertj.version>3.6.1</assertj.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/libraries-2/pom.xml b/libraries-2/pom.xml
index 0988ed454e..409363111a 100644
--- a/libraries-2/pom.xml
+++ b/libraries-2/pom.xml
@@ -39,11 +39,6 @@
             <artifactId>parallel-collectors</artifactId>
             <version>${parallel-collectors.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-        </dependency>
         <dependency>
             <groupId>io.github.classgraph</groupId>
             <artifactId>classgraph</artifactId>
@@ -128,7 +123,6 @@
 
     <properties>
         <mapdb.version>3.0.7</mapdb.version>
-        <assertj.version>3.6.2</assertj.version>
         <classgraph.version>4.8.28</classgraph.version>
         <jbpm.version>6.0.0.Final</jbpm.version>
         <picocli.version>3.9.6</picocli.version>
diff --git a/libraries-4/pom.xml b/libraries-4/pom.xml
index b16d1f216f..7d19f6d504 100644
--- a/libraries-4/pom.xml
+++ b/libraries-4/pom.xml
@@ -73,11 +73,6 @@
             <artifactId>vavr</artifactId>
             <version>${vavr.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-        </dependency>
         <dependency>
             <groupId>org.pcollections</groupId>
             <artifactId>pcollections</artifactId>
@@ -117,7 +112,6 @@
         <javax.servlet.version>2.5</javax.servlet.version>
         <javax.jdo.version>3.2.0-m7</javax.jdo.version>
         <vavr.version>0.9.0</vavr.version>
-        <assertj.version>3.6.2</assertj.version>
         <pcollections.version>2.1.2</pcollections.version>
         <awaitility.version>3.0.0</awaitility.version>
         <streamex.version>0.6.5</streamex.version>
diff --git a/libraries-5/pom.xml b/libraries-5/pom.xml
index a3ca204995..63d1924852 100644
--- a/libraries-5/pom.xml
+++ b/libraries-5/pom.xml
@@ -17,11 +17,6 @@
             <artifactId>spring-web</artifactId>
             <version>${spring.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-        </dependency>
         <dependency>
             <groupId>org.jooq</groupId>
             <artifactId>jool</artifactId>
@@ -119,7 +114,6 @@
         <pact.version>3.5.0</pact.version>
         <jool.version>0.9.12</jool.version>
         <spring.version>4.3.8.RELEASE</spring.version>
-        <assertj.version>3.6.2</assertj.version>
         <scala.version>2.11</scala.version>
         <typesafe-akka.version>2.5.11</typesafe-akka.version>
         <streamex.version>0.6.5</streamex.version>
diff --git a/libraries-6/pom.xml b/libraries-6/pom.xml
index cf2c2c551d..accf5f3a9a 100644
--- a/libraries-6/pom.xml
+++ b/libraries-6/pom.xml
@@ -74,11 +74,6 @@
             <artifactId>commons-net</artifactId>
             <version>${commons-net.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-        </dependency>
         <dependency>
             <groupId>commons-io</groupId>
             <artifactId>commons-io</artifactId>
@@ -148,7 +143,6 @@
         <resilience4j.version>0.12.1</resilience4j.version>
         <protonpack.version>1.15</protonpack.version>
         <commons-net.version>3.6</commons-net.version>
-        <assertj.version>3.6.2</assertj.version>
         <renjin.version>3.5-beta72</renjin.version>
         <rcaller.version>3.0</rcaller.version>
         <rserve.version>1.8.1</rserve.version>
diff --git a/libraries-apache-commons-collections/pom.xml b/libraries-apache-commons-collections/pom.xml
index e2805552e3..2cb73babe6 100644
--- a/libraries-apache-commons-collections/pom.xml
+++ b/libraries-apache-commons-collections/pom.xml
@@ -24,17 +24,10 @@
             <version>${org.hamcrest.java-hamcrest.version}</version>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <properties>
         <commons.collections.version>4.1</commons.collections.version>
-        <assertj.version>3.6.2</assertj.version>
         <org.hamcrest.java-hamcrest.version>2.0.0.0</org.hamcrest.java-hamcrest.version>
     </properties>
 
diff --git a/libraries-apache-commons/pom.xml b/libraries-apache-commons/pom.xml
index 8fa55c1b0e..9bf6c40e19 100644
--- a/libraries-apache-commons/pom.xml
+++ b/libraries-apache-commons/pom.xml
@@ -13,11 +13,6 @@
     </parent>
 
     <dependencies>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-        </dependency>
         <dependency>
             <groupId>commons-beanutils</groupId>
             <artifactId>commons-beanutils</artifactId>
@@ -69,7 +64,6 @@
         <commons-text.version>1.1</commons-text.version>
         <commons-beanutils.version>1.9.3</commons-beanutils.version>
         <commons-chain.version>1.2</commons-chain.version>
-        <assertj.version>3.6.2</assertj.version>
         <commons.dbutils.version>1.6</commons.dbutils.version>
         <xchart-version>3.5.2</xchart-version>
         <common-math3.version>3.6.1</common-math3.version>
diff --git a/libraries-data-2/pom.xml b/libraries-data-2/pom.xml
index 75b2cc962d..b69d9808c4 100644
--- a/libraries-data-2/pom.xml
+++ b/libraries-data-2/pom.xml
@@ -96,11 +96,6 @@
             <artifactId>derive4j</artifactId>
             <version>${derive4j.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-        </dependency>
         <dependency>
             <groupId>org.slf4j</groupId>
             <artifactId>slf4j-api</artifactId>
@@ -160,7 +155,6 @@
         <spring.version>4.3.8.RELEASE</spring.version>
         <suanshu.version>4.0.0</suanshu.version>
         <derive4j.version>1.1.0</derive4j.version>
-        <assertj.version>3.6.2</assertj.version>
         <awaitility.version>3.0.0</awaitility.version>
         <univocity.version>2.8.4</univocity.version>
         <guava.version>29.0-jre</guava.version>
diff --git a/libraries-data-io/pom.xml b/libraries-data-io/pom.xml
index 1335ba54d1..713c4342d1 100644
--- a/libraries-data-io/pom.xml
+++ b/libraries-data-io/pom.xml
@@ -95,12 +95,6 @@
             <artifactId>protobuf-java</artifactId>
             <version>${google-protobuf.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${org.assertj.core.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <properties>
@@ -110,7 +104,6 @@
         <opencsv.version>4.1</opencsv.version>
         <google-api.version>1.23.0</google-api.version>
         <google-sheets.version>v4-rev493-1.21.0</google-sheets.version>
-        <org.assertj.core.version>3.9.0</org.assertj.core.version>
         <docx4j.version>3.3.5</docx4j.version>
         <jaxb-api.version>2.1</jaxb-api.version>
         <gson.version>2.8.7</gson.version>
diff --git a/libraries-http/pom.xml b/libraries-http/pom.xml
index a00bb4bd39..0ee5f4b290 100644
--- a/libraries-http/pom.xml
+++ b/libraries-http/pom.xml
@@ -13,11 +13,6 @@
     </parent>
 
     <dependencies>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-        </dependency>
         <!-- Dependencies for response decoder with okhttp -->
         <dependency>
             <groupId>com.squareup.okhttp3</groupId>
@@ -116,7 +111,6 @@
         <gson.version>2.8.5</gson.version>
         <httpclient.version>4.5.3</httpclient.version>
         <!-- <jackson.version>2.9.8</jackson.version> -->
-        <assertj.version>3.6.2</assertj.version>
         <com.squareup.okhttp3.version>4.9.1</com.squareup.okhttp3.version>
         <googleclient.version>1.23.0</googleclient.version>
         <async.http.client.version>2.2.0</async.http.client.version>
diff --git a/libraries-server/pom.xml b/libraries-server/pom.xml
index 954f666785..66d6295f7c 100644
--- a/libraries-server/pom.xml
+++ b/libraries-server/pom.xml
@@ -19,12 +19,6 @@
             <artifactId>org.eclipse.paho.client.mqttv3</artifactId>
             <version>${eclipse.paho.client.mqttv3.version}</version>
         </dependency>
-        <!-- https://mvnrepository.com/artifact/org.assertj/assertj-core -->
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-        </dependency>
         <dependency>
             <groupId>org.eclipse.jetty</groupId>
             <artifactId>jetty-server</artifactId>
@@ -96,7 +90,6 @@
     </dependencies>
 
     <properties>
-        <assertj.version>3.6.2</assertj.version>
         <httpclient.version>4.5.3</httpclient.version>
         <jetty.version>9.4.27.v20200227</jetty.version>
         <netty.version>4.1.20.Final</netty.version>
diff --git a/libraries-testing/pom.xml b/libraries-testing/pom.xml
index d7b4a88369..d62d094f08 100644
--- a/libraries-testing/pom.xml
+++ b/libraries-testing/pom.xml
@@ -118,11 +118,6 @@
             <version>${spring-mock-mvc.version}</version>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-        </dependency>
         <!-- https://mvnrepository.com/artifact/org.hamcrest/java-hamcrest -->
         <dependency>
             <groupId>org.hamcrest</groupId>
@@ -147,12 +142,6 @@
             <version>${h2.version}</version>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>net.bytebuddy</groupId>
             <artifactId>byte-buddy</artifactId>
@@ -206,7 +195,6 @@
         <hoverfly-java.version>0.8.1</hoverfly-java.version>
         <spring.version>4.3.8.RELEASE</spring.version>
         <spring-mock-mvc.version>4.1.1</spring-mock-mvc.version>
-        <assertj.version>3.14.0</assertj.version>
         <java-hamcrest.version>2.0.0.0</java-hamcrest.version>
         <h2.version>1.4.200</h2.version>
         <dbunit.version>2.7.0</dbunit.version>
diff --git a/libraries/pom.xml b/libraries/pom.xml
index b2e429ff65..b0a0aa22ea 100644
--- a/libraries/pom.xml
+++ b/libraries/pom.xml
@@ -45,12 +45,6 @@
             <artifactId>javassist</artifactId>
             <version>${javaassist.version}</version>
         </dependency>
-        <!-- https://mvnrepository.com/artifact/org.assertj/assertj-core -->
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-        </dependency>
         <dependency>
             <groupId>org.javers</groupId>
             <artifactId>javers-core</artifactId>
@@ -272,7 +266,6 @@
         <multiverse.version>0.7.0</multiverse.version>
         <cglib.version>3.2.7</cglib.version>
         <javatuples.version>1.2</javatuples.version>
-        <assertj.version>3.6.2</assertj.version>
         <javers.version>3.1.0</javers.version>
         <neuroph.version>2.92</neuroph.version>
         <serenity.version>1.9.26</serenity.version>
diff --git a/lombok/pom.xml b/lombok/pom.xml
index c5758ea8df..2daaf9f438 100644
--- a/lombok/pom.xml
+++ b/lombok/pom.xml
@@ -26,12 +26,6 @@
             <artifactId>hibernate-jpa-2.1-api</artifactId>
             <version>${hibernate-jpa-2.1-api.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <build>
@@ -77,7 +71,6 @@
         <hibernate-jpa-2.1-api.version>1.0.0.Final</hibernate-jpa-2.1-api.version>
         <!-- delombok maven plugin -->
         <delombok-maven-plugin.version>1.18.10.0</delombok-maven-plugin.version>
-        <assertj-core.version>3.8.0</assertj-core.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/mapstruct/pom.xml b/mapstruct/pom.xml
index 48687a73b9..4696a46abb 100644
--- a/mapstruct/pom.xml
+++ b/mapstruct/pom.xml
@@ -41,12 +41,6 @@
             <artifactId>lombok-mapstruct-binding</artifactId>
             <version>${lombok.mapstruct.binding.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <build>
@@ -87,7 +81,6 @@
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>
         <lombok.mapstruct.binding.version>0.2.0</lombok.mapstruct.binding.version>
-        <assertj.version>3.16.1</assertj.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/metrics/pom.xml b/metrics/pom.xml
index 0ba590ceec..6ac1761ca0 100644
--- a/metrics/pom.xml
+++ b/metrics/pom.xml
@@ -75,12 +75,6 @@
             <artifactId>metrics-aspectj-deps</artifactId>
             <version>${metrics-aspectj.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>com.netflix.spectator</groupId>
             <artifactId>spectator-api</artifactId>
@@ -95,7 +89,6 @@
         <micrometer.ver>1.7.1</micrometer.ver>
         <!-- <fasterxml.jackson.version>2.9.1</fasterxml.jackson.version> -->
         <spring-boot-starter-web.version>2.0.7.RELEASE</spring-boot-starter-web.version>
-        <assertj-core.version>3.11.1</assertj-core.version>
         <metrics-aspectj.version>1.1.0</metrics-aspectj.version>
     </properties>
 
diff --git a/mustache/pom.xml b/mustache/pom.xml
index db72e693c1..faa8bfd8a1 100644
--- a/mustache/pom.xml
+++ b/mustache/pom.xml
@@ -20,10 +20,6 @@
             <artifactId>compiler</artifactId>
             <version>${mustache.compiler.api.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-        </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-web</artifactId>
diff --git a/patterns/design-patterns-architectural/pom.xml b/patterns/design-patterns-architectural/pom.xml
index 11194a9c92..fe7bd38df8 100644
--- a/patterns/design-patterns-architectural/pom.xml
+++ b/patterns/design-patterns-architectural/pom.xml
@@ -30,12 +30,6 @@
             <artifactId>rest-assured</artifactId>
             <version>${rest-assured.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.hibernate</groupId>
             <artifactId>hibernate-core</artifactId>
@@ -50,7 +44,6 @@
     </dependencies>
 
     <properties>
-        <assertj-core.version>3.9.1</assertj-core.version>
         <hibernate-core.version>5.2.16.Final</hibernate-core.version>
         <mysql-connector.version>6.0.6</mysql-connector.version>
         <spring-boot.version>2.5.3</spring-boot.version>
diff --git a/patterns/design-patterns-behavioral-2/pom.xml b/patterns/design-patterns-behavioral-2/pom.xml
index f123a8f2f5..da29575526 100644
--- a/patterns/design-patterns-behavioral-2/pom.xml
+++ b/patterns/design-patterns-behavioral-2/pom.xml
@@ -14,17 +14,4 @@
         <version>1.0.0-SNAPSHOT</version>
     </parent>
 
-    <dependencies>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
-    </dependencies>
-
-    <properties>
-        <assertj.version>3.12.2</assertj.version>
-    </properties>
-
 </project>
\ No newline at end of file
diff --git a/patterns/design-patterns-behavioral/pom.xml b/patterns/design-patterns-behavioral/pom.xml
index bc032a0f8f..3ddbd6f0fc 100644
--- a/patterns/design-patterns-behavioral/pom.xml
+++ b/patterns/design-patterns-behavioral/pom.xml
@@ -36,18 +36,11 @@
             <artifactId>commons-lang3</artifactId>
             <version>${commons-lang3.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <properties>
         <intellij.annotations.version>16.0.2</intellij.annotations.version>
         <findbugs.annotations.version>3.0.1</findbugs.annotations.version>
-        <assertj-core.version>3.9.1</assertj-core.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/patterns/design-patterns-creational/pom.xml b/patterns/design-patterns-creational/pom.xml
index 21bc13c21c..de854d260e 100644
--- a/patterns/design-patterns-creational/pom.xml
+++ b/patterns/design-patterns-creational/pom.xml
@@ -26,18 +26,11 @@
             <artifactId>jsr305</artifactId>
             <version>${javax.annotations.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <properties>
         <freebuilder.version>2.4.1</freebuilder.version>
         <javax.annotations.version>3.0.2</javax.annotations.version>
-        <assertj-core.version>3.9.1</assertj-core.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/patterns/dip/pom.xml b/patterns/dip/pom.xml
index 44062aaede..3618791b97 100644
--- a/patterns/dip/pom.xml
+++ b/patterns/dip/pom.xml
@@ -14,17 +14,4 @@
         <version>1.0.0-SNAPSHOT</version>
     </parent>
 
-    <dependencies>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
-    </dependencies>
-
-    <properties>
-        <assertj-core.version>3.12.1</assertj-core.version>
-    </properties>
-
 </project>
\ No newline at end of file
diff --git a/persistence-modules/core-java-persistence/pom.xml b/persistence-modules/core-java-persistence/pom.xml
index 96f8cef310..efef12a525 100644
--- a/persistence-modules/core-java-persistence/pom.xml
+++ b/persistence-modules/core-java-persistence/pom.xml
@@ -22,12 +22,6 @@
             <version>${postgresql.version}</version>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>com.h2database</groupId>
             <artifactId>h2</artifactId>
@@ -62,7 +56,6 @@
 
     <properties>
         <h2.version>1.4.200</h2.version>
-        <assertj-core.version>3.10.0</assertj-core.version>
         <commons-dbcp2.version>2.4.0</commons-dbcp2.version>
         <HikariCP.version>3.2.0</HikariCP.version>
         <c3p0.version>0.9.5.2</c3p0.version>
diff --git a/persistence-modules/hibernate-enterprise/pom.xml b/persistence-modules/hibernate-enterprise/pom.xml
index 1d9ebfc156..18d1a4f3a6 100644
--- a/persistence-modules/hibernate-enterprise/pom.xml
+++ b/persistence-modules/hibernate-enterprise/pom.xml
@@ -19,12 +19,6 @@
             <artifactId>hibernate-core</artifactId>
             <version>${hibernate.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>com.h2database</groupId>
             <artifactId>h2</artifactId>
@@ -87,7 +81,6 @@
         <hibernate.version>5.3.7.Final</hibernate.version>
         <mysql.version>6.0.6</mysql.version>
         <mariaDB4j.version>2.2.3</mariaDB4j.version>
-        <assertj-core.version>3.8.0</assertj-core.version>
         <geodb.version>0.9</geodb.version>
         <hsqldb.version>2.3.4</hsqldb.version>
     </properties>
diff --git a/persistence-modules/hibernate-jpa/pom.xml b/persistence-modules/hibernate-jpa/pom.xml
index 85bfdac07f..7779a85e79 100644
--- a/persistence-modules/hibernate-jpa/pom.xml
+++ b/persistence-modules/hibernate-jpa/pom.xml
@@ -45,12 +45,6 @@
             <artifactId>spring-boot-starter-test</artifactId>
             <version>${spring-boot.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>com.h2database</groupId>
             <artifactId>h2</artifactId>
@@ -92,7 +86,6 @@
         <hibernate.version>5.3.7.Final</hibernate.version>
         <mysql.version>8.0.13</mysql.version>
         <mariaDB4j.version>2.2.3</mariaDB4j.version>
-        <assertj-core.version>3.8.0</assertj-core.version>
         <spring-boot.version>2.1.7.RELEASE</spring-boot.version>
     </properties>
 
diff --git a/persistence-modules/hibernate-libraries/pom.xml b/persistence-modules/hibernate-libraries/pom.xml
index 7d552b262d..81f084e102 100644
--- a/persistence-modules/hibernate-libraries/pom.xml
+++ b/persistence-modules/hibernate-libraries/pom.xml
@@ -62,12 +62,6 @@
             <version>${hibernate.version}</version>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>mysql</groupId>
             <artifactId>mysql-connector-java</artifactId>
@@ -166,7 +160,6 @@
     </profiles>
 
     <properties>
-        <assertj-core.version>3.15.0</assertj-core.version>
         <datasource-proxy.version>1.6</datasource-proxy.version>
         <guava.version>29.0-jre</guava.version>
         <hibernate-types.version>2.9.7</hibernate-types.version>
diff --git a/persistence-modules/hibernate-mapping/pom.xml b/persistence-modules/hibernate-mapping/pom.xml
index 805402951e..9661c3fd4c 100644
--- a/persistence-modules/hibernate-mapping/pom.xml
+++ b/persistence-modules/hibernate-mapping/pom.xml
@@ -29,12 +29,6 @@
             <artifactId>hibernate-types-52</artifactId>
             <version>${hibernate-types.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>com.h2database</groupId>
             <artifactId>h2</artifactId>
@@ -77,7 +71,6 @@
     <properties>
         <hibernate.version>5.4.12.Final</hibernate.version>
         <hibernate-types.version>2.10.4</hibernate-types.version>
-        <assertj-core.version>3.8.0</assertj-core.version>
         <hibernate-validator.version>6.0.16.Final</hibernate-validator.version>
         <org.glassfish.javax.el.version>3.0.1-b11</org.glassfish.javax.el.version>
         <money-api.version>1.0.3</money-api.version>
diff --git a/persistence-modules/hibernate-queries/pom.xml b/persistence-modules/hibernate-queries/pom.xml
index 83b2ea4d00..20c2da9ea9 100644
--- a/persistence-modules/hibernate-queries/pom.xml
+++ b/persistence-modules/hibernate-queries/pom.xml
@@ -19,12 +19,6 @@
             <artifactId>hibernate-core</artifactId>
             <version>${hibernate.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>com.h2database</groupId>
             <artifactId>h2</artifactId>
@@ -60,7 +54,6 @@
     <properties>
         <mysql.version>6.0.6</mysql.version>
         <mariaDB4j.version>2.2.3</mariaDB4j.version>
-        <assertj-core.version>3.8.0</assertj-core.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/persistence-modules/hibernate5/pom.xml b/persistence-modules/hibernate5/pom.xml
index d46d2c16d4..6bec0d4981 100644
--- a/persistence-modules/hibernate5/pom.xml
+++ b/persistence-modules/hibernate5/pom.xml
@@ -19,12 +19,6 @@
             <artifactId>hibernate-core</artifactId>
             <version>${hibernate.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>com.h2database</groupId>
             <artifactId>h2</artifactId>
@@ -66,7 +60,6 @@
         <hibernate.version>5.4.12.Final</hibernate.version>
         <mysql.version>6.0.6</mysql.version>
         <mariaDB4j.version>2.2.3</mariaDB4j.version>
-        <assertj-core.version>3.8.0</assertj-core.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/persistence-modules/java-jpa-2/pom.xml b/persistence-modules/java-jpa-2/pom.xml
index 26895f3a87..884142f821 100644
--- a/persistence-modules/java-jpa-2/pom.xml
+++ b/persistence-modules/java-jpa-2/pom.xml
@@ -58,12 +58,6 @@
             <artifactId>querydsl-jpa</artifactId>
             <version>${querydsl.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <build>
@@ -139,7 +133,6 @@
         <hibernate.version>5.4.14.Final</hibernate.version>
         <eclipselink.version>2.7.4</eclipselink.version>
         <javax.persistence-api.version>2.2</javax.persistence-api.version>
-        <assertj.version>3.11.1</assertj.version>
         <maven-compiler-plugin.version>3.5.1</maven-compiler-plugin.version>
         <maven-processor-plugin.version>3.3.3</maven-processor-plugin.version>
         <build-helper-maven-plugin.version>3.0.0</build-helper-maven-plugin.version>
diff --git a/persistence-modules/java-jpa-3/pom.xml b/persistence-modules/java-jpa-3/pom.xml
index 0eb4b8075d..b67b8bf608 100644
--- a/persistence-modules/java-jpa-3/pom.xml
+++ b/persistence-modules/java-jpa-3/pom.xml
@@ -62,12 +62,6 @@
             <version>${postgresql.version}</version>
             <scope>runtime</scope>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.testcontainers</groupId>
             <artifactId>postgresql</artifactId>
@@ -94,7 +88,6 @@
         <eclipselink.version>2.7.4</eclipselink.version>
         <mysql.version>8.0.21</mysql.version>
         <javax.persistence-api.version>2.2</javax.persistence-api.version>
-        <assertj.version>3.11.1</assertj.version>
         <maven-compiler-plugin.version>3.5.1</maven-compiler-plugin.version>
         <maven-processor-plugin.version>3.3.3</maven-processor-plugin.version>
         <build-helper-maven-plugin.version>3.0.0</build-helper-maven-plugin.version>
diff --git a/persistence-modules/jpa-hibernate-cascade-type/pom.xml b/persistence-modules/jpa-hibernate-cascade-type/pom.xml
index 467fe11bc3..fd0ae117c7 100644
--- a/persistence-modules/jpa-hibernate-cascade-type/pom.xml
+++ b/persistence-modules/jpa-hibernate-cascade-type/pom.xml
@@ -17,12 +17,6 @@
             <artifactId>hibernate-core</artifactId>
             <version>${hibernate.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>com.h2database</groupId>
             <artifactId>h2</artifactId>
@@ -48,7 +42,6 @@
 
     <properties>
         <hibernate.version>5.4.3.Final</hibernate.version>
-        <assertj-core.version>3.12.2</assertj-core.version>
         <hibernate-validator.version>6.0.17.Final</hibernate-validator.version>
         <javax.el-api.version>3.0.0</javax.el-api.version>
         <org.glassfish.javax.el.version>3.0.1-b11</org.glassfish.javax.el.version>
diff --git a/persistence-modules/spring-jpa/pom.xml b/persistence-modules/spring-jpa/pom.xml
index 1dca2baa98..c0324e9efd 100644
--- a/persistence-modules/spring-jpa/pom.xml
+++ b/persistence-modules/spring-jpa/pom.xml
@@ -98,11 +98,6 @@
             <artifactId>guava</artifactId>
             <version>${guava.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-        </dependency>
         <!-- test scoped -->
         <dependency>
             <groupId>org.apache.commons</groupId>
@@ -132,7 +127,6 @@
         <javax.el-api.version>2.2.5</javax.el-api.version>
         <!-- util -->
         <guava.version>21.0</guava.version>
-        <assertj.version>3.8.0</assertj.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/persistence-modules/spring-mybatis/pom.xml b/persistence-modules/spring-mybatis/pom.xml
index 1a55e76900..4eda66e1a9 100644
--- a/persistence-modules/spring-mybatis/pom.xml
+++ b/persistence-modules/spring-mybatis/pom.xml
@@ -64,12 +64,6 @@
             <version>${org.springframework.version}</version>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <build>
@@ -90,8 +84,6 @@
         <mybatis.version>3.5.2</mybatis.version>
         <mybatis-spring-boot-starter.version>2.1.0</mybatis-spring-boot-starter.version>
         <h2.version>1.4.197</h2.version>
-        <!-- testing -->
-        <assertj-core.version>3.8.0</assertj-core.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/pom.xml b/pom.xml
index 2672706f6b..6d10dcb668 100644
--- a/pom.xml
+++ b/pom.xml
@@ -58,6 +58,12 @@
             <version>${junit-jupiter.version}</version>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <version>${assertj.version}</version>
+            <scope>test</scope>
+        </dependency>
         <dependency>
             <groupId>org.hamcrest</groupId>
             <artifactId>hamcrest</artifactId>
@@ -1388,6 +1394,7 @@
 
         <!-- used only in dependency management to force this version, not included as a direct dependency -->
         <junit.version>4.13.2</junit.version>
+        <assertj.version>3.21.0</assertj.version>
         <hamcrest.version>2.2</hamcrest.version>
         <hamcrest-all.version>1.3</hamcrest-all.version>
         <mockito.version>3.3.0</mockito.version>
diff --git a/reactor-core/pom.xml b/reactor-core/pom.xml
index 420b1b028a..39a66cee3e 100644
--- a/reactor-core/pom.xml
+++ b/reactor-core/pom.xml
@@ -26,12 +26,6 @@
             <version>${reactor.version}</version>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.projectlombok</groupId>
             <artifactId>lombok</artifactId>
@@ -42,7 +36,6 @@
 
     <properties>
         <reactor.version>3.4.9</reactor.version>
-        <assertj.version>3.6.1</assertj.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/rxjava-core/pom.xml b/rxjava-core/pom.xml
index cd6075e127..89ea1bf7a2 100644
--- a/rxjava-core/pom.xml
+++ b/rxjava-core/pom.xml
@@ -30,15 +30,9 @@
             <artifactId>awaitility</artifactId>
             <version>${awaitility.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-        </dependency>
     </dependencies>
 
     <properties>
-        <assertj.version>3.8.0</assertj.version>
         <rx.java.version>1.2.5</rx.java.version>
         <awaitility.version>1.7.0</awaitility.version>
         <rx.java2.version>2.2.2</rx.java2.version>
diff --git a/rxjava-libraries/pom.xml b/rxjava-libraries/pom.xml
index 5d2c9ec3bb..f8df78d741 100644
--- a/rxjava-libraries/pom.xml
+++ b/rxjava-libraries/pom.xml
@@ -41,11 +41,6 @@
             <version>${h2.version}</version>
             <scope>runtime</scope>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-        </dependency>
     </dependencies>
 
     <properties>
@@ -53,7 +48,6 @@
         <rx.java.version>1.2.5</rx.java.version>
         <rxrelay.version>2.0.0</rxrelay.version>
         <rx.java2.version>2.2.2</rx.java2.version>
-        <assertj.version>3.8.0</assertj.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/rxjava-observables/pom.xml b/rxjava-observables/pom.xml
index feb4fc1f39..bcc3c4bbce 100644
--- a/rxjava-observables/pom.xml
+++ b/rxjava-observables/pom.xml
@@ -25,17 +25,11 @@
             <artifactId>rxjava-string</artifactId>
             <version>${rx.java.string.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-        </dependency>
     </dependencies>
 
     <properties>
         <rx.java.string.version>1.1.1</rx.java.string.version>
         <rx.java.version>1.2.5</rx.java.version>
-        <assertj.version>3.8.0</assertj.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/rxjava-operators/pom.xml b/rxjava-operators/pom.xml
index ba85dc428b..d833fb5d14 100644
--- a/rxjava-operators/pom.xml
+++ b/rxjava-operators/pom.xml
@@ -31,11 +31,6 @@
             <artifactId>rxjava2-extensions</artifactId>
             <version>${rxjava2.ext.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-        </dependency>
         <dependency>
             <groupId>io.reactivex</groupId>
             <artifactId>rxjava-math</artifactId>
@@ -51,7 +46,6 @@
     <properties>
         <rxjava2.ext.version>0.20.4</rxjava2.ext.version>
         <rx.java2.version>2.2.2</rx.java2.version>
-        <assertj.version>3.8.0</assertj.version>
         <rx.java.version>1.2.5</rx.java.version>
         <rx.java.math.version>1.0.0</rx.java.math.version>
         <awaitility.version>1.7.0</awaitility.version>
diff --git a/spring-boot-modules/spring-boot-keycloak/pom.xml b/spring-boot-modules/spring-boot-keycloak/pom.xml
index adad6bb2d2..09ddcaa724 100644
--- a/spring-boot-modules/spring-boot-keycloak/pom.xml
+++ b/spring-boot-modules/spring-boot-keycloak/pom.xml
@@ -73,19 +73,11 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-web-services</artifactId>
         </dependency>
-
         <dependency>
             <groupId>org.springframework.security</groupId>
             <artifactId>spring-security-test</artifactId>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>3.21.0</version>
-            <scope>test</scope>
-        </dependency>
-
     </dependencies>
 
     <build>
diff --git a/spring-cloud/spring-cloud-archaius/pom.xml b/spring-cloud/spring-cloud-archaius/pom.xml
index efd912f8db..ba977bbdc9 100644
--- a/spring-cloud/spring-cloud-archaius/pom.xml
+++ b/spring-cloud/spring-cloud-archaius/pom.xml
@@ -46,11 +46,6 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-test</artifactId>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.junit.platform</groupId>
             <artifactId>junit-platform-runner</artifactId>
diff --git a/spring-core-2/pom.xml b/spring-core-2/pom.xml
index de5c7c0d4d..dda23c4ea4 100644
--- a/spring-core-2/pom.xml
+++ b/spring-core-2/pom.xml
@@ -129,11 +129,6 @@
             <artifactId>spring-test</artifactId>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.hamcrest</groupId>
             <artifactId>hamcrest</artifactId>
@@ -205,7 +200,6 @@
         <!-- util -->
         <guava.version>25.1-jre</guava.version>
         <easymock.version>3.6</easymock.version>
-        <assertj.version>3.6.1</assertj.version>
         <shedlock.version>2.1.0</shedlock.version>
         <javassist.version>3.22.0-GA</javassist.version>
         <maven.version>3.2.2</maven.version>
diff --git a/spring-core-4/pom.xml b/spring-core-4/pom.xml
index f9665a672b..1c3e138670 100644
--- a/spring-core-4/pom.xml
+++ b/spring-core-4/pom.xml
@@ -61,12 +61,6 @@
             <version>${awaitility.version}</version>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>javax.servlet</groupId>
             <artifactId>javax.servlet-api</artifactId>
@@ -79,7 +73,6 @@
         <spring.boot.version>2.2.2.RELEASE</spring.boot.version>
         <guava.version>28.2-jre</guava.version>
         <awaitility.version>4.0.2</awaitility.version>
-        <assertj-core.version>2.9.1</assertj-core.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/spring-core/pom.xml b/spring-core/pom.xml
index ab41670224..7afcf7addd 100644
--- a/spring-core/pom.xml
+++ b/spring-core/pom.xml
@@ -57,12 +57,6 @@
             <version>${mockito.spring.boot.version}</version>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>commons-io</groupId>
             <artifactId>commons-io</artifactId>
@@ -89,7 +83,6 @@
         <guava.version>20.0</guava.version>
         <spring-boot.version>1.5.2.RELEASE</spring-boot.version>
         <mockito.version>1.10.19</mockito.version>
-        <assertj.version>3.12.2</assertj.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/spring-di/pom.xml b/spring-di/pom.xml
index cbd49242e4..20207663cf 100644
--- a/spring-di/pom.xml
+++ b/spring-di/pom.xml
@@ -74,12 +74,6 @@
             <version>${mockito.spring.boot.version}</version>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>commons-io</groupId>
             <artifactId>commons-io</artifactId>
@@ -156,7 +150,6 @@
         <guava.version>20.0</guava.version>
         <spring-boot.version>1.5.2.RELEASE</spring-boot.version>
         <mockito.version>1.10.19</mockito.version>
-        <assertj.version>3.12.2</assertj.version>
         <aspectjweaver.version>1.9.5</aspectjweaver.version>
     </properties>
 
diff --git a/spring-ejb/spring-ejb-remote/pom.xml b/spring-ejb/spring-ejb-remote/pom.xml
index b7bf2aa79b..a180955dcf 100644
--- a/spring-ejb/spring-ejb-remote/pom.xml
+++ b/spring-ejb/spring-ejb-remote/pom.xml
@@ -19,12 +19,6 @@
             <artifactId>javaee-api</artifactId>
             <scope>provided</scope>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <profiles>
@@ -86,7 +80,6 @@
     </profiles>
 
     <properties>
-        <assertj.version>3.9.0</assertj.version>
         <cargo-maven2-plugin.version>1.6.1</cargo-maven2-plugin.version>
         <wildfly-maven-plugin.version>1.1.0.Alpha5</wildfly-maven-plugin.version>
     </properties>
diff --git a/spring-jersey/pom.xml b/spring-jersey/pom.xml
index 64a34074bb..197469ccf9 100644
--- a/spring-jersey/pom.xml
+++ b/spring-jersey/pom.xml
@@ -105,12 +105,6 @@
             <artifactId>slf4j-jdk14</artifactId>
             <version>${org.slf4j.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
         <!-- Test -->
         <dependency>
             <groupId>org.springframework.boot</groupId>
@@ -218,7 +212,6 @@
         <httpclient.version>4.5.5</httpclient.version>
         <javax.servlet-api.version>4.0.0</javax.servlet-api.version>
         <wiremock.version>2.27.2</wiremock.version>
-        <assertj-core.version>3.10.0</assertj-core.version>
         <spring-boot.version>1.5.10.RELEASE</spring-boot.version>
     </properties>
 
diff --git a/testing-modules/assertion-libraries/pom.xml b/testing-modules/assertion-libraries/pom.xml
index 42dead6ee2..ea9a37afaf 100644
--- a/testing-modules/assertion-libraries/pom.xml
+++ b/testing-modules/assertion-libraries/pom.xml
@@ -39,12 +39,6 @@
             <artifactId>assertj-guava</artifactId>
             <version>${assertj-guava.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.javalite</groupId>
             <artifactId>javalite-common</artifactId>
@@ -83,8 +77,7 @@
 
     <properties>
         <truth.version>0.32</truth.version>
-        <assertj-guava.version>3.1.0</assertj-guava.version>
-        <assertj-core.version>3.9.0</assertj-core.version>
+        <assertj-guava.version>3.4.0</assertj-guava.version>
         <assertj-generator.version>2.1.0</assertj-generator.version>
         <javalite.version>1.4.13</javalite.version>
         <jgotesting.version>0.12</jgotesting.version>
diff --git a/testing-modules/assertion-libraries/src/test/java/com/baeldung/assertj/AssertJConditionUnitTest.java b/testing-modules/assertion-libraries/src/test/java/com/baeldung/assertj/AssertJConditionUnitTest.java
index ec2d93500f..4ed7fc3ee0 100644
--- a/testing-modules/assertion-libraries/src/test/java/com/baeldung/assertj/AssertJConditionUnitTest.java
+++ b/testing-modules/assertion-libraries/src/test/java/com/baeldung/assertj/AssertJConditionUnitTest.java
@@ -25,7 +25,7 @@ public class AssertJConditionUnitTest {
             assertThat(member).isNot(senior);
             fail();
         } catch (AssertionError e) {
-            assertThat(e).hasMessageContaining("not to be <senior>");
+            assertThat(e).hasMessageContaining("not to be senior");
         }
     }
 
@@ -38,7 +38,7 @@ public class AssertJConditionUnitTest {
             assertThat(member).has(nameJohn);
             fail();
         } catch (AssertionError e) {
-            assertThat(e).hasMessageContaining("<name John>");
+            assertThat(e).hasMessageContaining("name John");
         }
     }
 
diff --git a/testing-modules/junit5-annotations/pom.xml b/testing-modules/junit5-annotations/pom.xml
index 86e71110c8..95c0d2d448 100644
--- a/testing-modules/junit5-annotations/pom.xml
+++ b/testing-modules/junit5-annotations/pom.xml
@@ -37,17 +37,10 @@
             <version>${junit-platform.version}</version>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <properties>
         <log4j2.version>2.8.2</log4j2.version>
-        <assertj-core.version>3.11.1</assertj-core.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/testing-modules/mockito-3/pom.xml b/testing-modules/mockito-3/pom.xml
index 5a79d81080..10130290df 100644
--- a/testing-modules/mockito-3/pom.xml
+++ b/testing-modules/mockito-3/pom.xml
@@ -22,17 +22,10 @@
             <version>${mockito.version}</version>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <properties>
         <mockito.version>3.8.0</mockito.version>
-        <assertj.version>3.8.0</assertj.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/testing-modules/testing-assertions/pom.xml b/testing-modules/testing-assertions/pom.xml
index f9cd35c5e5..12af95b575 100644
--- a/testing-modules/testing-assertions/pom.xml
+++ b/testing-modules/testing-assertions/pom.xml
@@ -18,12 +18,6 @@
             <artifactId>logback-classic</artifactId>
             <version>${logback.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.hamcrest</groupId>
             <artifactId>hamcrest-all</artifactId>
@@ -39,7 +33,6 @@
     </dependencies>
 
     <properties>
-        <assertj-core.version>3.16.1</assertj-core.version>
         <commons-collections4.version>4.4</commons-collections4.version>
     </properties>
 
diff --git a/testing-modules/testing-libraries-2/pom.xml b/testing-modules/testing-libraries-2/pom.xml
index 2e8a1b4ed2..c7e9ea0e2b 100644
--- a/testing-modules/testing-libraries-2/pom.xml
+++ b/testing-modules/testing-libraries-2/pom.xml
@@ -30,12 +30,6 @@
             <version>${lombok.version}</version>
             <scope>provided</scope>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>com.github.stefanbirkner</groupId>
             <artifactId>system-rules</artifactId>
@@ -114,7 +108,6 @@
         <system-rules.version>1.19.0</system-rules.version>
         <system-lambda.version>1.0.0</system-lambda.version>
         <system-stubs.version>1.1.0</system-stubs.version>
-        <assertj-core.version>3.16.1</assertj-core.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/video-tutorials/jackson-annotations/pom.xml b/video-tutorials/jackson-annotations/pom.xml
index 827715fe5f..29f457964b 100644
--- a/video-tutorials/jackson-annotations/pom.xml
+++ b/video-tutorials/jackson-annotations/pom.xml
@@ -100,12 +100,6 @@
             <version>${json-schema-validator.version}</version>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <build>
@@ -126,7 +120,6 @@
         <!-- testing -->
         <rest-assured.version>3.0.1</rest-assured.version>
         <rest-assured-json-schema-validator.version>3.0.0</rest-assured-json-schema-validator.version>
-        <assertj-core.version>3.6.1</assertj-core.version>
         <json-schema-validator.version>2.2.6</json-schema-validator.version>
         <json-path.version>3.0.1</json-path.version>
     </properties>
diff --git a/xml/pom.xml b/xml/pom.xml
index 9acaecbd22..968682ee38 100644
--- a/xml/pom.xml
+++ b/xml/pom.xml
@@ -123,12 +123,6 @@
             <artifactId>commons-lang</artifactId>
             <version>${commons-lang.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.xmlunit</groupId>
             <artifactId>xmlunit-assertj</artifactId>
@@ -368,7 +362,6 @@
         <jaxb-core.version>2.3.0.1</jaxb-core.version>
         <jaxb-impl.version>2.3.2</jaxb-impl.version>
         <stax-api.version>1.0-2</stax-api.version>
-        <assertj-core.version>3.12.2</assertj-core.version>
         <xmlunit-assertj.version>2.6.3</xmlunit-assertj.version>
         <freemarker.version>2.3.29</freemarker.version>
         <mustache.version>0.9.6</mustache.version>