Fix: tests

Author: tatevikg1

tests/Unit/Subscription/Serializer/SubscriberNormalizerTest.php

@@ -75,7 +75,7 @@ public function testNormalize(): void
                     'list_position' => null,
                     'subject_prefix' => null,
                     'public' => true,
-                    'category' => '',
+                    'category' => null,
                     'rss_feed' => null,
                 ]
             ],

tests/Unit/Subscription/Validator/Constraint/ListExistsValidatorTest.php

@@ -50,12 +50,6 @@ public function testValidateThrowsUnexpectedTypeException(): void
         $this->validator->validate('123', $this->createMock(Constraint::class));
     }
 
-    public function testValidateThrowsUnexpectedValueException(): void
-    {
-        $this->expectException(UnexpectedValueException::class);
-        $this->validator->validate(123, new ListExists());
-    }
-
     public function testValidateThrowsNotFoundExceptionIfListDoesNotExist(): void
     {
         $this->subscriberListRepository