diff --git a/core-java-collections/src/test/java/com/baeldung/list/arraylist/ClearVsRemoveAllTest.java b/core-java-collections/src/test/java/com/baeldung/list/arraylist/ClearVsRemoveAllTest.java
deleted file mode 100644
index 5b9fbc3415..0000000000
--- a/core-java-collections/src/test/java/com/baeldung/list/arraylist/ClearVsRemoveAllTest.java
+++ /dev/null
@@ -1,38 +0,0 @@
-package com.baeldung.list.arraylist;
-
-import org.junit.jupiter.api.Test;
-
-import java.util.ArrayList;
-import java.util.Arrays;
-
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertTrue;
-
-/**
- * Unit tests demonstrating differences between ArrayList#clear() and ArrayList#removeAll()
- */
-class ClearVsRemoveAllTest {
-
-    /*
-     * Tests
-     */
-    @Test
-    void givenArrayListWithElements_whenClear_thenListBecomesEmpty() {
-        ArrayList<Integer> list = new ArrayList<>(Arrays.asList(1, 2, 3, 4, 5));
-
-        list.clear();
-
-        assertTrue(list.isEmpty());
-    }
-
-    @Test
-    void givenTwoArrayListsWithCommonElements_whenRemoveAll_thenFirstListMissElementsFromSecondList() {
-        ArrayList<Integer> firstList = new ArrayList<>(Arrays.asList(1, 2, 3, 4, 5));
-        ArrayList<Integer> secondList = new ArrayList<>(Arrays.asList(3, 4, 5, 6, 7));
-
-        firstList.removeAll(secondList);
-
-        assertEquals(Arrays.asList(1, 2), firstList);
-    }
-
-}
diff --git a/core-java-collections/src/test/java/com/baeldung/list/arraylist/ClearVsRemoveAllUnitTest.java b/core-java-collections/src/test/java/com/baeldung/list/arraylist/ClearVsRemoveAllUnitTest.java
new file mode 100644
index 0000000000..5e31a326b8
--- /dev/null
+++ b/core-java-collections/src/test/java/com/baeldung/list/arraylist/ClearVsRemoveAllUnitTest.java
@@ -0,0 +1,40 @@
+package com.baeldung.list.arraylist;
+
+import org.junit.jupiter.api.Test;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collection;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+/**
+ * Unit tests demonstrating differences between ArrayList#clear() and ArrayList#removeAll()
+ */
+class ClearVsRemoveAllUnitTest {
+
+    /*
+     * Tests
+     */
+    @Test
+    void givenArrayListWithElements_whenClear_thenListBecomesEmpty() {
+        Collection<Integer> collection = new ArrayList<>(Arrays.asList(1, 2, 3, 4, 5));
+
+        collection.clear();
+
+        assertTrue(collection.isEmpty());
+    }
+
+    @Test
+    void givenTwoArrayListsWithCommonElements_whenRemoveAll_thenFirstListMissElementsFromSecondList() {
+        Collection<Integer> firstCollection = new ArrayList<>(Arrays.asList(1, 2, 3, 4, 5));
+        Collection<Integer> secondCollection = new ArrayList<>(Arrays.asList(3, 4, 5, 6, 7));
+
+        firstCollection.removeAll(secondCollection);
+
+        assertEquals(Arrays.asList(1, 2), firstCollection);
+        assertEquals(Arrays.asList(3, 4, 5, 6, 7), secondCollection);
+    }
+
+}