diff --git a/src/test/java/hs/fulda/de/ci/exam/project/AccountTest.java b/src/test/java/hs/fulda/de/ci/exam/project/AccountTest.java
index e757a98..0e2f4ec 100644
--- a/src/test/java/hs/fulda/de/ci/exam/project/AccountTest.java
+++ b/src/test/java/hs/fulda/de/ci/exam/project/AccountTest.java
@@ -2,12 +2,17 @@ package hs.fulda.de.ci.exam.project;
 
 import org.junit.jupiter.api.*;
 import org.junit.jupiter.api.extension.ExtendWith;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.MethodSource;
+import org.junit.jupiter.params.provider.ValueSource;
 import org.mockito.InjectMocks;
 import org.mockito.Mock;
 import org.mockito.junit.jupiter.MockitoExtension;
 
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Date;
+import java.util.List;
 
 import static org.junit.jupiter.api.Assertions.*;
 import static org.junit.jupiter.api.Assertions.assertThrows;
@@ -44,10 +49,23 @@ public class AccountTest {
     }
 
     @Test
-    @DisplayName("Should Not Create Itinerary when Starting Airport is null")
+    @DisplayName("Should Not add Account details when Person Name is null")
     public void shouldThrowRuntimeExceptionWhenPersonNameIsNull(){
+       assertThrows(RuntimeException.class, () -> {
+            account1.addAccountDetails(null, address1,"max.mustermann@gmail.com", "0151283290" );
+        });
+    }
+
+    @DisplayName("Check if the Email is valid")
+    @ParameterizedTest
+    @MethodSource("phoneNumberList")
+    public void shouldThrowRuntimeExceptionWhenPhoneNumberIsNull(String phoneNumber){
         assertThrows(RuntimeException.class, () -> {
-            account1.addAccountDetails(null, address1,"max.mustermann@gmail.com", "015147890206" );
+            account1.addAccountDetails(null, address1,"max.mustermann@gmail.com", phoneNumber);
         });
     }
+
+    private static List<String> phoneNumberList() {
+        return Arrays.asList("1234567", "0123", "0125314622696456", "0abnajf");
+    }
 }