diff --git a/core-java-modules/core-java-collections-4/src/test/java/com/baeldung/collections/comparation/ArrayListUnitTest.java b/core-java-modules/core-java-collections-4/src/test/java/com/baeldung/collections/comparation/ArrayListUnitTest.java
index 4041ff1637..bc6a07d274 100644
--- a/core-java-modules/core-java-collections-4/src/test/java/com/baeldung/collections/comparation/ArrayListUnitTest.java
+++ b/core-java-modules/core-java-collections-4/src/test/java/com/baeldung/collections/comparation/ArrayListUnitTest.java
@@ -14,9 +14,9 @@ public class ArrayListUnitTest {
     void givenArrayList_whenItemAddedToSpecificIndex_thenItCanBeRetrieved() {
         List<String> list = new ArrayList<>();
         list.add("Daniel");
-        list.add(1, "Marko");
+        list.add(0, "Marko");
         assertThat(list).hasSize(2);
-        assertThat(list.get(1)).isEqualTo("Marko");
+        assertThat(list.get(0)).isEqualTo("Marko");
     }
 
     @Test
diff --git a/core-java-modules/core-java-collections-4/src/test/java/com/baeldung/collections/comparation/LinkedListUnitTest.java b/core-java-modules/core-java-collections-4/src/test/java/com/baeldung/collections/comparation/LinkedListUnitTest.java
index c2ab554c91..aa6b7fa923 100644
--- a/core-java-modules/core-java-collections-4/src/test/java/com/baeldung/collections/comparation/LinkedListUnitTest.java
+++ b/core-java-modules/core-java-collections-4/src/test/java/com/baeldung/collections/comparation/LinkedListUnitTest.java
@@ -15,7 +15,7 @@ public class LinkedListUnitTest {
     void givenLinkedList_whenItemIsAppended_thenItCanBeRetrieved() {
         LinkedList<String> list = new LinkedList<>();
         list.addLast("Daniel");
-        list.addFirst( "Marko");
+        list.addFirst("Marko");
         assertThat(list).hasSize(2);
         assertThat(list.getLast()).isEqualTo("Daniel");
     }