diff --git a/core-java-modules/core-java-nio-2/src/test/java/com/baeldung/niovsnio2/NioVsNio2UnitTest.java b/core-java-modules/core-java-nio-2/src/test/java/com/baeldung/niovsnio2/NioVsNio2UnitTest.java
index 7413ebda13..6d6ed0ebbf 100644
--- a/core-java-modules/core-java-nio-2/src/test/java/com/baeldung/niovsnio2/NioVsNio2UnitTest.java
+++ b/core-java-modules/core-java-nio-2/src/test/java/com/baeldung/niovsnio2/NioVsNio2UnitTest.java
@@ -65,6 +65,7 @@ public class NioVsNio2UnitTest {
     public void listFilesUsingWalk() throws Exception {
         Path path = Paths.get("src/test");
         Stream<Path> walk = Files.walk(path);
-        walk.forEach(System.out::println);
+
+        assertThat(walk.findAny()).isPresent();
     }
 }
diff --git a/core-java-modules/core-java-streams-2/src/test/java/com/baeldung/streams/StreamToImmutableUnitTest.java b/core-java-modules/core-java-streams-2/src/test/java/com/baeldung/streams/StreamToImmutableUnitTest.java
index e5339d8327..ba99a6eaf7 100644
--- a/core-java-modules/core-java-streams-2/src/test/java/com/baeldung/streams/StreamToImmutableUnitTest.java
+++ b/core-java-modules/core-java-streams-2/src/test/java/com/baeldung/streams/StreamToImmutableUnitTest.java
@@ -1,57 +1,59 @@
 package com.baeldung.streams;
 
 import com.google.common.collect.ImmutableList;
-import org.junit.Test;
 
 import java.util.*;
 import java.util.stream.IntStream;
 
 import static java.util.stream.Collectors.*;
+import static org.junit.jupiter.api.Assertions.assertEquals;
 
-public class StreamToImmutableUnitTest {
+import org.junit.jupiter.api.Test;
+
+class StreamToImmutableUnitTest {
 
     @Test
-    public void whenUsingCollectingToImmutableSet_thenSuccess() {
+    void whenUsingCollectingToImmutableSet_thenSuccess() {
         List<String> givenList = Arrays.asList("a", "b", "c");
         List<String> result = givenList.stream()
             .collect(collectingAndThen(toSet(), ImmutableList::copyOf));
 
-        System.out.println(result.getClass());
+        assertEquals("com.google.common.collect.RegularImmutableList", result.getClass().getName());
     }
 
     @Test
-    public void whenUsingCollectingToUnmodifiableList_thenSuccess() {
+    void whenUsingCollectingToUnmodifiableList_thenSuccess() {
         List<String> givenList = new ArrayList<>(Arrays.asList("a", "b", "c"));
         List<String> result = givenList.stream()
             .collect(collectingAndThen(toList(), Collections::unmodifiableList));
 
-        System.out.println(result.getClass());
+        assertEquals("java.util.Collections$UnmodifiableRandomAccessList", result.getClass().getName());
     }
 
     @Test
-    public void whenCollectToImmutableList_thenSuccess() {
+    void whenCollectToImmutableList_thenSuccess() {
         List<Integer> list = IntStream.range(0, 9)
             .boxed()
             .collect(ImmutableList.toImmutableList());
 
-        System.out.println(list.getClass());
+        assertEquals("com.google.common.collect.RegularImmutableList", list.getClass().getName());
     }
 
     @Test
-    public void whenCollectToMyImmutableListCollector_thenSuccess() {
+    void whenCollectToMyImmutableListCollector_thenSuccess() {
         List<String> givenList = Arrays.asList("a", "b", "c", "d");
         List<String> result = givenList.stream()
             .collect(MyImmutableListCollector.toImmutableList());
 
-        System.out.println(result.getClass());
+        assertEquals("java.util.Collections$UnmodifiableRandomAccessList", result.getClass().getName());
     }
 
     @Test
-    public void whenPassingSupplier_thenSuccess() {
+    void whenPassingSupplier_thenSuccess() {
         List<String> givenList = Arrays.asList("a", "b", "c", "d");
         List<String> result = givenList.stream()
             .collect(MyImmutableListCollector.toImmutableList(LinkedList::new));
 
-        System.out.println(result.getClass());
+        assertEquals("java.util.Collections$UnmodifiableList", result.getClass().getName());
     }
 }
diff --git a/muleesb/src/test/resources/log4j2-test.xml b/muleesb/src/test/resources/log4j2-test.xml
index 6351ae041c..771817a1bc 100644
--- a/muleesb/src/test/resources/log4j2-test.xml
+++ b/muleesb/src/test/resources/log4j2-test.xml
@@ -18,8 +18,8 @@
         <AsyncLogger name="org.springframework.beans.factory" level="WARN"/>
 
         <!-- Mule classes -->
-        <AsyncLogger name="org.mule" level="INFO"/>
-        <AsyncLogger name="com.mulesoft" level="INFO"/>
+        <AsyncLogger name="org.mule" level="WARN"/>
+        <AsyncLogger name="com.mulesoft" level="WARN"/>
 
         <!-- Reduce DM verbosity -->
         <AsyncLogger name="org.jetel" level="WARN"/>
diff --git a/persistence-modules/deltaspike/src/test/resources/logback-test.xml b/persistence-modules/deltaspike/src/test/resources/logback-test.xml
new file mode 100644
index 0000000000..bdc292924b
--- /dev/null
+++ b/persistence-modules/deltaspike/src/test/resources/logback-test.xml
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
+            </pattern>
+        </encoder>
+    </appender>
+
+    <logger name="org.jboss" level="WARN"/>
+
+    <logger name="org.apache.deltaspike" level="WARN"/>
+
+    <logger name="org.hibernate" level="WARN"/>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>
\ No newline at end of file
diff --git a/persistence-modules/java-cassandra/src/test/resources/logback-test.xml b/persistence-modules/java-cassandra/src/test/resources/logback-test.xml
new file mode 100644
index 0000000000..d2c2764154
--- /dev/null
+++ b/persistence-modules/java-cassandra/src/test/resources/logback-test.xml
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
+            </pattern>
+        </encoder>
+    </appender>
+
+    <logger name="org.apache.cassandra.config" level="WARN" />
+
+    <logger name="org.apache.cassandra.service" level="WARN" />
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>
\ No newline at end of file
diff --git a/persistence-modules/spring-data-cassandra-reactive/src/test/resources/logback-test.xml b/persistence-modules/spring-data-cassandra-reactive/src/test/resources/logback-test.xml
index 8d4771e308..1daccde00e 100644
--- a/persistence-modules/spring-data-cassandra-reactive/src/test/resources/logback-test.xml
+++ b/persistence-modules/spring-data-cassandra-reactive/src/test/resources/logback-test.xml
@@ -6,6 +6,10 @@
         </encoder>
     </appender>
 
+    <logger name="org.apache.cassandra.config" level="WARN"/>
+
+    <logger name="org.apache.cassandra.service" level="WARN"/>
+
     <root level="INFO">
         <appender-ref ref="STDOUT" />
     </root>
diff --git a/spring-cloud-modules/spring-cloud-eureka/spring-cloud-eureka-server/src/test/resources/logback-test.xml b/spring-cloud-modules/spring-cloud-eureka/spring-cloud-eureka-server/src/test/resources/logback-test.xml
new file mode 100644
index 0000000000..c270ba92f6
--- /dev/null
+++ b/spring-cloud-modules/spring-cloud-eureka/spring-cloud-eureka-server/src/test/resources/logback-test.xml
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
+            </pattern>
+        </encoder>
+    </appender>
+
+    <logger name="com.netflix" level="WARN"/>
+
+    <logger name="org.springframework.boot" level="WARN"/>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>
\ No newline at end of file
diff --git a/spring-cloud-modules/spring-cloud-netflix-feign/src/test/resources/logback-test.xml b/spring-cloud-modules/spring-cloud-netflix-feign/src/test/resources/logback-test.xml
new file mode 100644
index 0000000000..83bf131763
--- /dev/null
+++ b/spring-cloud-modules/spring-cloud-netflix-feign/src/test/resources/logback-test.xml
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
+            </pattern>
+        </encoder>
+    </appender>
+
+    <logger name="com.baeldung.cloud.netflix.feign.client" level="INFO"/>
+
+    <logger name="org.springframework.core.env" level="WARN"/>
+
+    <logger name="org.springframework" level="WARN"/>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>
\ No newline at end of file
diff --git a/spring-cloud-modules/spring-cloud-openfeign/src/test/resources/logback-test.xml b/spring-cloud-modules/spring-cloud-openfeign/src/test/resources/logback-test.xml
new file mode 100644
index 0000000000..612e4e0e9d
--- /dev/null
+++ b/spring-cloud-modules/spring-cloud-openfeign/src/test/resources/logback-test.xml
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
+            </pattern>
+        </encoder>
+    </appender>
+
+    <logger name="com.baeldung.cloud.openfeign.client" level="INFO"/>
+
+    <logger name="org.eclipse.jetty.server" level="WARN"/>
+
+    <logger name="org.springframework" level="WARN"/>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>
\ No newline at end of file
diff --git a/spring-cloud-modules/spring-cloud-task/springcloudtaskbatch/src/test/resources/logback-test.xml b/spring-cloud-modules/spring-cloud-task/springcloudtaskbatch/src/test/resources/logback-test.xml
new file mode 100644
index 0000000000..0e8e2b4a06
--- /dev/null
+++ b/spring-cloud-modules/spring-cloud-task/springcloudtaskbatch/src/test/resources/logback-test.xml
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
+            </pattern>
+        </encoder>
+    </appender>
+
+    <logger name="org.springframework" level="WARN"/>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>
\ No newline at end of file
diff --git a/spring-cloud-modules/spring-cloud-zookeeper/spring-cloud-zookeeper-greeting/src/test/resources/logback-test.xml b/spring-cloud-modules/spring-cloud-zookeeper/spring-cloud-zookeeper-greeting/src/test/resources/logback-test.xml
new file mode 100644
index 0000000000..98a596c8ad
--- /dev/null
+++ b/spring-cloud-modules/spring-cloud-zookeeper/spring-cloud-zookeeper-greeting/src/test/resources/logback-test.xml
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
+            </pattern>
+        </encoder>
+    </appender>
+
+    <logger name="org.apache.zookeeper" level="WARN"/>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>
\ No newline at end of file
diff --git a/spring-cloud-modules/spring-cloud-zookeeper/spring-cloud-zookeeper-helloworld/src/test/resources/logback-test.xml b/spring-cloud-modules/spring-cloud-zookeeper/spring-cloud-zookeeper-helloworld/src/test/resources/logback-test.xml
new file mode 100644
index 0000000000..98a596c8ad
--- /dev/null
+++ b/spring-cloud-modules/spring-cloud-zookeeper/spring-cloud-zookeeper-helloworld/src/test/resources/logback-test.xml
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
+            </pattern>
+        </encoder>
+    </appender>
+
+    <logger name="org.apache.zookeeper" level="WARN"/>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>
\ No newline at end of file
diff --git a/spring-cloud-modules/spring-cloud-zuul-eureka-integration/eureka-server/src/test/resources/logback-test.xml b/spring-cloud-modules/spring-cloud-zuul-eureka-integration/eureka-server/src/test/resources/logback-test.xml
new file mode 100644
index 0000000000..a037859a0c
--- /dev/null
+++ b/spring-cloud-modules/spring-cloud-zuul-eureka-integration/eureka-server/src/test/resources/logback-test.xml
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
+            </pattern>
+        </encoder>
+    </appender>
+
+    <logger name="org.springframework.boot" level="WARN"/>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>
\ No newline at end of file
diff --git a/spring-jenkins-pipeline/src/test/resources/logback-test.xml b/spring-jenkins-pipeline/src/test/resources/logback-test.xml
new file mode 100644
index 0000000000..b9242f40a8
--- /dev/null
+++ b/spring-jenkins-pipeline/src/test/resources/logback-test.xml
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration scan="true" scanPeriod="15 seconds" debug="false">
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>[%d{ISO8601}]-[%thread] %-5level %logger - %msg%n</pattern>
+        </encoder>
+    </appender>
+
+    <logger name="org.springframework.boot.test.context" level="WARN"/>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>
\ No newline at end of file