diff --git a/core-java-modules/core-java-string-algorithms-3/src/test/java/com/baeldung/emailvalidation/EmailValidationUnitTest.java b/core-java-modules/core-java-string-algorithms-3/src/test/java/com/baeldung/emailvalidation/EmailValidationUnitTest.java
new file mode 100644
index 0000000000..3b2b77fc4a
--- /dev/null
+++ b/core-java-modules/core-java-string-algorithms-3/src/test/java/com/baeldung/emailvalidation/EmailValidationUnitTest.java
@@ -0,0 +1,59 @@
+package com.baeldung.emailvalidation;
+
+import static org.junit.Assert.assertEquals;
+import org.apache.commons.validator.routines.EmailValidator;
+import org.junit.Test;
+
+public class EmailValidationUnitTest {
+
+    private String emailAddress;
+
+    @Test
+    public void testUsingEmailValidator() {
+        emailAddress = "username@domain.com";
+        assertEquals(EmailValidator.getInstance()
+            .isValid(emailAddress), true);
+    }
+
+    @Test
+    public void testUsingSimpleRegex() {
+        emailAddress = "username@domain.com";
+        assertEquals(EmailValidation.usingSimpleRegex(emailAddress), true);
+    }
+
+    @Test
+    public void testUsingStrictRegex() {
+        emailAddress = "username@domain.com";
+        assertEquals(EmailValidation.usingStrictRegex(emailAddress), true);
+    }
+
+    @Test
+    public void testUsingUnicodeRegex() {
+        emailAddress = "用户名@领域.电脑";
+        assertEquals(EmailValidation.usingUnicodeRegex(emailAddress), true);
+    }
+
+    @Test
+    public void testUsingRFC5322Regex() {
+        emailAddress = "username@domain.com";
+        assertEquals(EmailValidation.usingRFC5322Regex(emailAddress), true);
+    }
+
+    @Test
+    public void testRestrictDots() {
+        emailAddress = "username@domain.com";
+        assertEquals(EmailValidation.restrictDots(emailAddress), true);
+    }
+
+    @Test
+    public void testOwaspValidation() {
+        emailAddress = "username@domain.com";
+        assertEquals(EmailValidation.owaspValidation(emailAddress), true);
+    }
+
+    @Test
+    public void testTopLevelDomain() {
+        emailAddress = "username@domain.com";
+        assertEquals(EmailValidation.topLevelDomain(emailAddress), true);
+    }
+}
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