diff --git a/core-java-modules/core-java-15/pom.xml b/core-java-modules/core-java-15/pom.xml
index e6193b4ea3..5f1ff1bbca 100644
--- a/core-java-modules/core-java-15/pom.xml
+++ b/core-java-modules/core-java-15/pom.xml
@@ -13,6 +13,7 @@
         <version>0.0.1-SNAPSHOT</version>
     </parent>
 
+
     <dependencies>
         <dependency>
             <groupId>org.apache.commons</groupId>
@@ -26,4 +27,25 @@
         </dependency>
     </dependencies>
 
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <release>${maven.compiler.release}</release>
+                    <source>${maven.compiler.source.version}</source>
+                    <target>${maven.compiler.target.version}</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+    <properties>
+        <maven.compiler.source.version>17</maven.compiler.source.version>
+        <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>
+    </properties>
+
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-date-operations-3/src/test/java/com/baeldung/firstandlastdayofyear/FirstAndLastDayOfYearUnitTest.java b/core-java-modules/core-java-date-operations-3/src/test/java/com/baeldung/firstandlastdayofyear/FirstAndLastDayOfYearUnitTest.java
index 5434c84af5..6f631958ef 100644
--- a/core-java-modules/core-java-date-operations-3/src/test/java/com/baeldung/firstandlastdayofyear/FirstAndLastDayOfYearUnitTest.java
+++ b/core-java-modules/core-java-date-operations-3/src/test/java/com/baeldung/firstandlastdayofyear/FirstAndLastDayOfYearUnitTest.java
@@ -21,8 +21,13 @@ public class FirstAndLastDayOfYearUnitTest {
         LocalDate firstDay = today.with(firstDayOfYear());
         LocalDate lastDay = today.with(lastDayOfYear());
 
-        assertEquals("2023-01-01", firstDay.toString());
-        assertEquals("2023-12-31", lastDay.toString());
+        assertEquals(today.getYear(), firstDay.getYear());
+        assertEquals(1, firstDay.getMonthValue());
+        assertEquals(1, firstDay.getDayOfMonth());
+
+        assertEquals(today.getYear(), lastDay.getYear());
+        assertEquals(12, lastDay.getMonthValue());
+        assertEquals(31, lastDay.getDayOfMonth());
     }
 
     @Test
diff --git a/core-java-modules/java-spi/exchange-rate-api/pom.xml b/core-java-modules/java-spi/exchange-rate-api/pom.xml
index 8067175cac..bb22c63de1 100644
--- a/core-java-modules/java-spi/exchange-rate-api/pom.xml
+++ b/core-java-modules/java-spi/exchange-rate-api/pom.xml
@@ -3,6 +3,7 @@
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
+    <groupId>com.baeldung</groupId>
     <artifactId>exchange-rate-api</artifactId>
     <name>exchange-rate-api</name>
     <packaging>jar</packaging>
diff --git a/core-java-modules/java-spi/exchange-rate-impl/pom.xml b/core-java-modules/java-spi/exchange-rate-impl/pom.xml
index 7ec10b1c04..7885d876a0 100644
--- a/core-java-modules/java-spi/exchange-rate-impl/pom.xml
+++ b/core-java-modules/java-spi/exchange-rate-impl/pom.xml
@@ -4,6 +4,7 @@
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <artifactId>exchange-rate-impl</artifactId>
+    <groupId>com.baeldung</groupId>
     <name>exchange-rate-impl</name>
     <packaging>jar</packaging>
 
diff --git a/core-java-modules/java-spi/pom.xml b/core-java-modules/java-spi/pom.xml
index 48538f03b5..837700103e 100644
--- a/core-java-modules/java-spi/pom.xml
+++ b/core-java-modules/java-spi/pom.xml
@@ -3,8 +3,10 @@
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
+    <groupId>com.baeldung</groupId>
     <artifactId>java-spi</artifactId>
     <name>java-spi</name>
+    <version>1.0.0-SNAPSHOT</version>
     <packaging>pom</packaging>
 
     <parent>
diff --git a/core-java-modules/pom.xml b/core-java-modules/pom.xml
index 7b26afbfd5..038930e0d4 100644
--- a/core-java-modules/pom.xml
+++ b/core-java-modules/pom.xml
@@ -6,13 +6,13 @@
     <groupId>com.baeldung.core-java-modules</groupId>
     <artifactId>core-java-modules</artifactId>
     <name>core-java-modules</name>
+    <version>0.0.1-SNAPSHOT</version>
     <packaging>pom</packaging>
 
     <parent>
         <groupId>com.baeldung</groupId>
         <artifactId>parent-modules</artifactId>
         <version>1.0.0-SNAPSHOT</version>
-        <relativePath>..</relativePath>
     </parent>
 
     <modules>
@@ -215,6 +215,29 @@
         <module>java-websocket</module>
     </modules>
 
+    <dependencies>
+        <dependency>
+            <groupId>com.google.guava</groupId>
+            <artifactId>guava</artifactId>
+            <version>${guava.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.openjdk.jmh</groupId>
+            <artifactId>jmh-core</artifactId>
+            <version>${jmh-core.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>commons-io</groupId>
+            <artifactId>commons-io</artifactId>
+            <version>${commons-io.version}</version>
+        </dependency>
+    </dependencies>
+
+    <properties>
+        <maven.compiler.source>17</maven.compiler.source>
+        <maven.compiler.target>17</maven.compiler.target>
+    </properties>
+
     <dependencyManagement>
         <dependencies>
             <dependency>
diff --git a/guava-modules/pom.xml b/guava-modules/pom.xml
index aa5a383663..be5a48c0cf 100644
--- a/guava-modules/pom.xml
+++ b/guava-modules/pom.xml
@@ -5,6 +5,7 @@
     <modelVersion>4.0.0</modelVersion>
     <artifactId>guava-modules</artifactId>
     <name>guava-modules</name>
+    <version>0.0.1-SNAPSHOT</version>
     <packaging>pom</packaging>
 
     <parent>
diff --git a/jackson-modules/jackson-custom-conversions/src/test/java/com/baeldung/defaultserializercustomserializer/CallingDefaultSerializerUnitTest.java b/jackson-modules/jackson-custom-conversions/src/test/java/com/baeldung/defaultserializercustomserializer/CallingDefaultSerializerUnitTest.java
index c8b4ec7e1a..e9eadb1622 100644
--- a/jackson-modules/jackson-custom-conversions/src/test/java/com/baeldung/defaultserializercustomserializer/CallingDefaultSerializerUnitTest.java
+++ b/jackson-modules/jackson-custom-conversions/src/test/java/com/baeldung/defaultserializercustomserializer/CallingDefaultSerializerUnitTest.java
@@ -11,6 +11,7 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
+import com.fasterxml.jackson.core.exc.StreamConstraintsException;
 import org.junit.Before;
 import org.junit.Test;
 
@@ -115,7 +116,7 @@ public class CallingDefaultSerializerUnitTest {
 
     }
 
-    @Test(expected = StackOverflowError.class)
+    @Test(expected = StreamConstraintsException.class)
     public void givenFolder_whenSerializedWithCallingOwnSerializer_exceptionOccured() throws IOException {
 
         SimpleModule module = new SimpleModule();
diff --git a/jackson-modules/pom.xml b/jackson-modules/pom.xml
index 58c58164e8..e80340a4b9 100644
--- a/jackson-modules/pom.xml
+++ b/jackson-modules/pom.xml
@@ -5,6 +5,7 @@
     <modelVersion>4.0.0</modelVersion>
     <artifactId>jackson-modules</artifactId>
     <name>jackson-modules</name>
+    <version>0.0.1-SNAPSHOT</version>
     <packaging>pom</packaging>
 
     <parent>
@@ -31,6 +32,16 @@
             <artifactId>jackson-dataformat-xml</artifactId>
             <version>${jackson.version}</version>
         </dependency>
+         <dependency>
+            <groupId>com.google.guava</groupId>
+            <artifactId>guava</artifactId>
+            <version>${guava.version}</version>
+        </dependency>
+         <dependency>
+            <groupId>commons-io</groupId>
+            <artifactId>commons-io</artifactId>
+            <version>${commons-io.version}</version>
+        </dependency>
     </dependencies>
 
 </project>
\ No newline at end of file
diff --git a/rxjava-modules/pom.xml b/rxjava-modules/pom.xml
index 160bbb327a..7bdfd0a9c1 100644
--- a/rxjava-modules/pom.xml
+++ b/rxjava-modules/pom.xml
@@ -6,6 +6,7 @@
     <groupId>com.baeldung.rxjava-modules</groupId>
     <artifactId>rxjava-modules</artifactId>
     <name>rxjava-modules</name>
+    <version>0.0.1-SNAPSHOT</version>
     <packaging>pom</packaging>
 
     <parent>
@@ -48,6 +49,11 @@
             <artifactId>awaitility</artifactId>
             <version>${awaitility.version}</version>
         </dependency>
+         <dependency>
+            <groupId>com.google.guava</groupId>
+            <artifactId>guava</artifactId>
+            <version>${guava.version}</version>
+        </dependency>
     </dependencies>
 
     <properties>