diff --git a/test/test_Error.c b/test/test_Error.c
index d2aef22..036ac24 100644
--- a/test/test_Error.c
+++ b/test/test_Error.c
@@ -15,10 +15,22 @@ void test_error()
 	int invalidErrorCodes_1[bound];
 	int invalidErrorCodesLarge_2[bound];
 	int invalidErrorCodesLargest_3[bound];
-
+	
 	int validErrorCodeUnsuccessfulLogin[bound];
 	int validErrorCodeMaximumNumberOfAttempts[bound];
 	int validErrorCodeNoMenuEntryForNumber[bound];
+	/*new test cases*/
+	int validErrorCodeNoCustomerDataFile[bound];
+	int validErrorCodeTooYoung[bound];
+	int validErrorCodeCreatingFile[bound];
+	int validErrorCodeForenameTooLong[bound];
+	int validErrorCodeSurnameTooLong[bound];
+	int validErrorCodePasswordTooLong[bound];
+	
+	int validErrorCodeInvalidCharacterForename[bound];
+	int validErrorCodeInvalidCharacterSurname[bound];
+	int validErrorCodeTooManyDigits[bound];
+	
 
 	for(int i=0;i<bound;++i){
 		/*1000 numbers in the range from 1 to 2000 */
@@ -33,7 +45,16 @@ void test_error()
 		validErrorCodeMaximumNumberOfAttempts[i] = -2;
 		/*1000 times -3 in array*/
 		validErrorCodeNoMenuEntryForNumber[i] = -3;
-	}
+		validErrorCodeNoCustomerDataFile[i] = -4;
+		validErrorCodeTooYoung[i] = -5;
+		validErrorCodeCreatingFile[i] = -6;
+		validErrorCodeForenameTooLong[i] = -7;
+		validErrorCodeSurnameTooLong[i] = -8;
+		validErrorCodePasswordTooLong[i] = -9;
+		validErrorCodeInvalidCharacterForename[i] = -10;
+		validErrorCodeInvalidCharacterSurname[i] = -11;
+		validErrorCodeTooManyDigits[i] = -12;
+}
 
 	/*act and assertions for invalid error codes*/
 	for(int i=0;i<bound;++i){
@@ -46,5 +67,15 @@ void test_error()
 		TEST_ASSERT_EQUAL_INT(-1, errorMessage(validErrorCodeUnsuccessfulLogin[i]));
 		TEST_ASSERT_EQUAL_INT(-2, errorMessage(validErrorCodeMaximumNumberOfAttempts[i]));
 		TEST_ASSERT_EQUAL_INT(-3, errorMessage(validErrorCodeNoMenuEntryForNumber[i]));
+		/*new test cases*/
+		TEST_ASSERT_EQUAL_INT(-4, errorMessage(validErrorCodeNoCustomerDataFile[i]));
+		TEST_ASSERT_EQUAL_INT(-5, errorMessage(validErrorCodeTooYoung[i]));
+		TEST_ASSERT_EQUAL_INT(-6, errorMessage(validErrorCodeCreatingFile[i]));
+		TEST_ASSERT_EQUAL_INT(-7, errorMessage(validErrorCodeForenameTooLong[i]));
+		TEST_ASSERT_EQUAL_INT(-8, errorMessage(validErrorCodeSurnameTooLong[i]));
+		TEST_ASSERT_EQUAL_INT(-9, errorMessage(validErrorCodePasswordTooLong[i]));
+		TEST_ASSERT_EQUAL_INT(-10, errorMessage(validErrorCodeInvalidCharacterForename[i]));
+		TEST_ASSERT_EQUAL_INT(-11, errorMessage(validErrorCodeInvalidCharacterSurname[i]));
+		TEST_ASSERT_EQUAL_INT(-12, errorMessage(validErrorCodeTooManyDigits[i]));
 	}
 }