diff --git a/java-strings/src/test/java/com/baeldung/string/MatchWordsUnitTest.java b/java-strings/src/test/java/com/baeldung/string/MatchWordsUnitTest.java
index 0b25a265b3..1c2288068b 100644
--- a/java-strings/src/test/java/com/baeldung/string/MatchWordsUnitTest.java
+++ b/java-strings/src/test/java/com/baeldung/string/MatchWordsUnitTest.java
@@ -8,52 +8,59 @@ public class MatchWordsUnitTest {
 
     private final String[] words = {"hello", "Baeldung"};
     private final String inputString = "hello there, Baeldung";
+    private final String wholeInput = "helloBaeldung";
 
     @Test
     public void givenText_whenCallingStringContains_shouldMatchWords() {
-
         final boolean result = MatchWords.containsWords(inputString, words);
-
         assertThat(result).isEqualTo(true);
     }
 
     @Test
     public void givenText_whenCallingJava8_shouldMatchWords() {
-
         final boolean result = MatchWords.containsWordsJava8(inputString, words);
-
         assertThat(result).isEqualTo(true);
     }
 
+    @Test
+    public void givenText_whenCallingJava8_shouldNotMatchWords() {
+        final boolean result = MatchWords.containsWordsJava8(wholeInput, words);
+        assertThat(result).isEqualTo(false);
+    }
+
     @Test
     public void givenText_whenCallingPattern_shouldMatchWords() {
-
         final boolean result = MatchWords.containsWordsPatternMatch(inputString, words);
-
         assertThat(result).isEqualTo(true);
     }
 
     @Test
     public void givenText_whenCallingAhoCorasick_shouldMatchWords() {
-
         final boolean result = MatchWords.containsWordsAhoCorasick(inputString, words);
-
         assertThat(result).isEqualTo(true);
     }
 
+    @Test
+    public void givenText_whenCallingAhoCorasick_shouldNotMatchWords() {
+        final boolean result = MatchWords.containsWordsAhoCorasick(wholeInput, words);
+        assertThat(result).isEqualTo(false);
+    }
+
     @Test
     public void givenText_whenCallingIndexOf_shouldMatchWords() {
-
         final boolean result = MatchWords.containsWordsIndexOf(inputString, words);
-
         assertThat(result).isEqualTo(true);
     }
 
     @Test
     public void givenText_whenCallingArrayList_shouldMatchWords() {
-
         final boolean result = MatchWords.containsWordsArray(inputString, words);
-
         assertThat(result).isEqualTo(true);
     }
+
+    @Test
+    public void givenText_whenCallingArrayList_shouldNotMatchWords() {
+        final boolean result = MatchWords.containsWordsArray(wholeInput, words);
+        assertThat(result).isEqualTo(false);
+    }
 }