diff --git a/core-java-modules/core-java-annotations/pom.xml b/core-java-modules/core-java-annotations/pom.xml
index 73290bb025..ceda260e69 100644
--- a/core-java-modules/core-java-annotations/pom.xml
+++ b/core-java-modules/core-java-annotations/pom.xml
@@ -11,7 +11,7 @@
         <groupId>com.ossez.core-java-modules</groupId>
         <artifactId>core-java-modules</artifactId>
         <version>0.0.2-SNAPSHOT</version>
-        <relativePath></relativePath>
+        <relativePath>../pom.xml</relativePath>
     </parent>
 
     <dependencies>
diff --git a/core-java-modules/core-java-collections-list/src/test/java/com/ossez/collections/JavaCollectionCleanupUnitTest.java b/core-java-modules/core-java-collections-list/src/test/java/com/ossez/collections/JavaCollectionCleanupUnitTest.java
index 40aa276080..f5f85ee57d 100644
--- a/core-java-modules/core-java-collections-list/src/test/java/com/ossez/collections/JavaCollectionCleanupUnitTest.java
+++ b/core-java-modules/core-java-collections-list/src/test/java/com/ossez/collections/JavaCollectionCleanupUnitTest.java
@@ -1,9 +1,9 @@
 package com.ossez.collections;
 
+import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.Matchers.containsInAnyOrder;
 import static org.hamcrest.Matchers.containsInRelativeOrder;
 import static org.hamcrest.Matchers.hasSize;
-import static org.junit.Assert.assertThat;
 
 import java.util.ArrayList;
 import java.util.Collections;
@@ -13,22 +13,28 @@ import java.util.List;
 
 import org.apache.commons.collections4.CollectionUtils;
 import org.apache.commons.collections4.PredicateUtils;
-import org.junit.Test;
 
 import com.google.common.base.Predicates;
 import com.google.common.collect.Iterables;
 import com.google.common.collect.Lists;
 import com.google.common.collect.Sets;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.TestInstance;
 
+/**
+ * Test for list Clean up
+ *
+ * <p><a href="https://www.ossez.com/t/java-list-null/13940">https://www.ossez.com/t/java-list-null/13940</a></p>
+ *
+ * @author YuCheng
+ */
+@TestInstance(TestInstance.Lifecycle.PER_CLASS)
 public class JavaCollectionCleanupUnitTest {
 
-    // tests - removing nulls
-
     @Test
     public void givenListContainsNulls_whenRemovingNullsWithPlainJava_thenCorrect() {
         final List<Integer> list = Lists.newArrayList(null, 1, null);
-        while (list.remove(null))
-            ;
+        while (list.remove(null));
 
         assertThat(list, hasSize(1));
     }
diff --git a/core-java-modules/pom.xml b/core-java-modules/pom.xml
index c5bf29f281..09d7bee994 100644
--- a/core-java-modules/pom.xml
+++ b/core-java-modules/pom.xml
@@ -16,10 +16,10 @@
 
     <modules>
         <module>core-java-8</module>
-<!--        <module>core-java-annotations</module>-->
+        <module>core-java-annotations</module>
         <module>core-java-collections-list</module>
-<!--        <module>core-java-datetime-conversion</module>-->
-<!--        <module>core-java-io</module>-->
+        <!--        <module>core-java-datetime-conversion</module>-->
+        <!--        <module>core-java-io</module>-->
     </modules>
 
     <dependencyManagement>