diff --git a/assignment/src/test/java/appointmentplanner/customlist/api/CustomLinkedListTest.java b/assignment/src/test/java/appointmentplanner/customlist/api/CustomLinkedListTest.java
index fbbf254..1e558cd 100644
--- a/assignment/src/test/java/appointmentplanner/customlist/api/CustomLinkedListTest.java
+++ b/assignment/src/test/java/appointmentplanner/customlist/api/CustomLinkedListTest.java
@@ -2,10 +2,14 @@ package appointmentplanner.customlist.api;
 
 import static org.assertj.core.api.Assertions.*;
 
+import java.util.stream.Stream;
+
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.converter.ConvertWith;
 import org.junit.jupiter.params.provider.CsvSource;
 
+import appointmentplanner.StringArrayConverter;
 import appointmentplanner.customlist.CustomLinkedListImpl;
 
 public class CustomLinkedListTest {
@@ -32,7 +36,14 @@ public class CustomLinkedListTest {
       "'Ty, jsi, ale, hloupy', 'to', false"
 
   })
-  void cllContains_shouldReturnCorrectResult(String[] data, String toContain, boolean shouldContain) {
+  void cllContains_shouldReturnCorrectResult(@ConvertWith(StringArrayConverter.class) String[] data, String toContain,
+      boolean shouldContain) {
+
+    CustomLinkedList<String> list = new CustomLinkedListImpl<>();
+
+    Stream.of(data).forEach(list::add);
+
+    assertThat(list.contains(toContain)).isEqualTo(shouldContain);
 
   }