diff --git a/java-strings/src/test/java/com/baeldung/string/StringContainingCharactersUnitTest.java b/java-strings/src/test/java/com/baeldung/string/StringContainingCharactersUnitTest.java
index 3303ebffbe..be79103e6b 100644
--- a/java-strings/src/test/java/com/baeldung/string/StringContainingCharactersUnitTest.java
+++ b/java-strings/src/test/java/com/baeldung/string/StringContainingCharactersUnitTest.java
@@ -11,7 +11,7 @@ public class StringContainingCharactersUnitTest {
 
     private static final Pattern[] inputRegexes = new Pattern[4];
 
-    private static final String regex = "^(?=.*?\\p{Lu})(?=.*?[\\p{L}&&[^\\p{Lu}]])(?=.*?\\d)" + "(?=.*?[`~!@#$%^&*()\\-_=+\\\\\\|\\[{\\]};:'\",<.>/?]).*$";
+    private static final String regex = "^(?=.*?\\p{Lu})(?=.*?\\p{Ll})(?=.*?\\d)(?=.*?[`~!@#$%^&*()\\-_=+\\\\|\\[{\\]};:'\",<.>/?]).*$";
 
     static {
         inputRegexes[0] = Pattern.compile(".*[A-Z].*");
@@ -101,21 +101,36 @@ public class StringContainingCharactersUnitTest {
     @Test
     public void givenSingleRegex_whenMatchingCorrectString_thenMatches() {
         String validInput = "Ab3;";
-        assertTrue(Pattern.compile(regex).matcher(validInput).matches());
+        assertTrue(Pattern
+          .compile(regex)
+          .matcher(validInput)
+          .matches());
     }
 
     @Test
     public void givenSingleRegex_whenMatchingWrongStrings_thenNotMatching() {
         String invalidInput = "Ab3";
-        assertFalse(Pattern.compile(regex).matcher(invalidInput).matches());
+        assertFalse(Pattern
+          .compile(regex)
+          .matcher(invalidInput)
+          .matches());
 
         invalidInput = "Ab;";
-        assertFalse(Pattern.compile(regex).matcher(invalidInput).matches());
+        assertFalse(Pattern
+          .compile(regex)
+          .matcher(invalidInput)
+          .matches());
 
         invalidInput = "A3;";
-        assertFalse(Pattern.compile(regex).matcher(invalidInput).matches());
+        assertFalse(Pattern
+          .compile(regex)
+          .matcher(invalidInput)
+          .matches());
 
         invalidInput = "b3;";
-        assertFalse(Pattern.compile(regex).matcher(invalidInput).matches());
+        assertFalse(Pattern
+          .compile(regex)
+          .matcher(invalidInput)
+          .matches());
     }
 }