diff --git a/core-java-modules/core-java-string-operations-2/src/main/java/com/baeldung/trim/LTrimRTrim.java b/core-java-modules/core-java-string-operations-2/src/main/java/com/baeldung/trim/LTrimRTrim.java
index af46f426d8..9ca1122441 100644
--- a/core-java-modules/core-java-string-operations-2/src/main/java/com/baeldung/trim/LTrimRTrim.java
+++ b/core-java-modules/core-java-string-operations-2/src/main/java/com/baeldung/trim/LTrimRTrim.java
@@ -117,6 +117,9 @@ public class LTrimRTrim {
         String ltrim = org.apache.commons.lang3.StringUtils.stripStart(src, " ");
         String rtrim = org.apache.commons.lang3.StringUtils.stripEnd(src, " ");
 
+        ltrim = org.apache.commons.lang3.StringUtils.stripStart(src, null);
+        rtrim = org.apache.commons.lang3.StringUtils.stripEnd(src, null);
+
         return checkStrings(ltrim, rtrim);
     }
 
diff --git a/core-java-modules/core-java-string-operations-2/src/test/java/com/baeldung/trim/LTrimRTrimUnitTest.java b/core-java-modules/core-java-string-operations-2/src/test/java/com/baeldung/trim/LTrimRTrimUnitTest.java
index 18c8608455..f60340c238 100644
--- a/core-java-modules/core-java-string-operations-2/src/test/java/com/baeldung/trim/LTrimRTrimUnitTest.java
+++ b/core-java-modules/core-java-string-operations-2/src/test/java/com/baeldung/trim/LTrimRTrimUnitTest.java
@@ -69,10 +69,16 @@ public class LTrimRTrimUnitTest {
         // Use StringUtils containsIgnoreCase to avoid case insensitive issues
         String ltrim = org.apache.commons.lang3.StringUtils.stripStart(src, " ");
         String rtrim = org.apache.commons.lang3.StringUtils.stripEnd(src, " ");
+        
+        // Compare the Strings obtained and the expected
+        Assert.assertTrue(ltrimResult.equalsIgnoreCase(ltrim));
+        Assert.assertTrue(rtrimResult.equalsIgnoreCase(rtrim));
+
+        ltrim = org.apache.commons.lang3.StringUtils.stripStart(src, null);
+        rtrim = org.apache.commons.lang3.StringUtils.stripEnd(src, null);
 
         // Compare the Strings obtained and the expected
         Assert.assertTrue(ltrimResult.equalsIgnoreCase(ltrim));
-
         Assert.assertTrue(rtrimResult.equalsIgnoreCase(rtrim));
     }