diff --git a/core-java/src/test/java/com/baeldung/chararraypassword/PasswordStoreExamplesUnitTest.java b/core-java/src/test/java/com/baeldung/chararraypassword/PasswordStoreExamplesUnitTest.java
index d28ad3a54c..d1cfe7df19 100644
--- a/core-java/src/test/java/com/baeldung/chararraypassword/PasswordStoreExamplesUnitTest.java
+++ b/core-java/src/test/java/com/baeldung/chararraypassword/PasswordStoreExamplesUnitTest.java
@@ -34,6 +34,19 @@ public class PasswordStoreExamplesUnitTest {
 		assertThat(stringPassword).isEqualTo("password");
 	}
 
+	@Test
+	public void givenStringHashCode_WhenStringValueReplaced_ThenHashCodesEqualAndValesEqual() {
+		String originalHashCode = Integer.toHexString(stringPassword.hashCode());
+
+		String newString = "********";
+		stringPassword.replace(stringPassword, newString);
+
+		String hashCodeAfterReplace = Integer.toHexString(stringPassword.hashCode());
+
+		assertThat(originalHashCode).isEqualTo(hashCodeAfterReplace);
+		assertThat(stringPassword).isEqualTo("password");
+	}
+
 	@Test
 	public void givenCharArrayHashCode_WhenArrayElementsValueChanged_ThenHashCodesEqualAndValesNotEqual() {
 		String originalHashCode = Integer.toHexString(charPassword.hashCode());