register rule to code quality set

Author: TomasVotruba

config/sets/phpunit-code-quality.php

@@ -9,6 +9,7 @@
 use Rector\PHPUnit\CodeQuality\Rector\Class_\SingleMockPropertyTypeRector;
 use Rector\PHPUnit\CodeQuality\Rector\Class_\TestWithToDataProviderRector;
 use Rector\PHPUnit\CodeQuality\Rector\Class_\YieldDataProviderRector;
+use Rector\PHPUnit\CodeQuality\Rector\ClassMethod\AddInstanceofAssertForNullableInstanceRector;
 use Rector\PHPUnit\CodeQuality\Rector\ClassMethod\DataProviderArrayItemsNewLinedRector;
 use Rector\PHPUnit\CodeQuality\Rector\ClassMethod\RemoveEmptyTestMethodRector;
 use Rector\PHPUnit\CodeQuality\Rector\ClassMethod\ReplaceTestAnnotationWithPrefixedFunctionRector;
@@ -75,6 +76,9 @@
         AssertEmptyNullableObjectToAssertInstanceofRector::class,
         AssertCountWithZeroToAssertEmptyRector::class,
 
+        // avoid call on nullable object
+        AddInstanceofAssertForNullableInstanceRector::class,
+
         /**
          * Improve direct testing of your code, without mock creep. Make it simple, clear and easy to maintain:
          *