diff --git a/dev/tests/api-functional/testsuite/Magento/GraphQl/Customer/CreateCustomerTest.php b/dev/tests/api-functional/testsuite/Magento/GraphQl/Customer/CreateCustomerTest.php
index 86360a71b1f68..1e6e0463fd318 100644
--- a/dev/tests/api-functional/testsuite/Magento/GraphQl/Customer/CreateCustomerTest.php
+++ b/dev/tests/api-functional/testsuite/Magento/GraphQl/Customer/CreateCustomerTest.php
@@ -139,7 +139,7 @@ public function testCreateCustomerIfInputDataIsEmpty()
 
     /**
      * @expectedException \Exception
-     * @expectedExceptionMessage The customer email is missing. Enter and try again.
+     * @expectedExceptionMessage Required parameters are missing: Email
      */
     public function testCreateCustomerIfEmailMissed()
     {
@@ -243,7 +243,7 @@ public function testCreateCustomerIfPassedAttributeDosNotExistsInCustomerInput()
 
     /**
      * @expectedException \Exception
-     * @expectedExceptionMessage Required parameters are missing: firstname
+     * @expectedExceptionMessage Required parameters are missing: First Name
      */
     public function testCreateCustomerIfNameEmpty()
     {
diff --git a/dev/tests/api-functional/testsuite/Magento/GraphQl/Customer/UpdateCustomerTest.php b/dev/tests/api-functional/testsuite/Magento/GraphQl/Customer/UpdateCustomerTest.php
index cd78018dc1ca5..84dc6d4705cc6 100644
--- a/dev/tests/api-functional/testsuite/Magento/GraphQl/Customer/UpdateCustomerTest.php
+++ b/dev/tests/api-functional/testsuite/Magento/GraphQl/Customer/UpdateCustomerTest.php
@@ -253,6 +253,8 @@ public function testUpdateEmailIfEmailAlreadyExists()
         $currentEmail = 'customer@example.com';
         $currentPassword = 'password';
         $existedEmail = 'customer_two@example.com';
+        $firstname = 'Richard';
+        $lastname = 'Rowe';
 
         $query = <<<QUERY
 mutation {
@@ -260,6 +262,8 @@ public function testUpdateEmailIfEmailAlreadyExists()
         input: {
             email: "{$existedEmail}"
             password: "{$currentPassword}"
+            firstname: "{$firstname}"
+            lastname: "{$lastname}"
         }
     ) {
         customer {
@@ -274,7 +278,7 @@ public function testUpdateEmailIfEmailAlreadyExists()
     /**
      * @magentoApiDataFixture Magento/Customer/_files/customer.php
      * @expectedException \Exception
-     * @expectedExceptionMessage Required parameters are missing: firstname
+     * @expectedExceptionMessage Required parameters are missing: First Name
      */
     public function testEmptyCustomerName()
     {