diff --git a/java-strings-2/src/test/java/com/baeldung/string/repetition/SubstringRepetitionUnitTest.java b/java-strings-2/src/test/java/com/baeldung/string/repetition/SubstringRepetitionUnitTest.java
index fbd948d2be..f382a24a7f 100644
--- a/java-strings-2/src/test/java/com/baeldung/string/repetition/SubstringRepetitionUnitTest.java
+++ b/java-strings-2/src/test/java/com/baeldung/string/repetition/SubstringRepetitionUnitTest.java
@@ -9,11 +9,11 @@ public class SubstringRepetitionUnitTest {
 
     private String validString = "aa";
     private String validStringTwo = "ababab";
-    private String validStringThree = "aabcaabcaabcaabc";
+    private String validStringThree = "baeldungbaeldung";
 
     private String invalidString = "aca";
     private String invalidStringTwo = "ababa";
-    private String invalidStringThree = "abcdab";
+    private String invalidStringThree = "baeldungnonrepeatedbaeldung";
 
     @Test
     public void givenValidStrings_whenCheckIfContainsOnlySubstrings_thenReturnsTrue() {