Use assertArrayHasKey()

Author: JakeQZ

tests/Unit/RuleSet/RuleSetTest.php

@@ -1183,7 +1183,7 @@ public function getRulesAssocWithPatternReturnsAllMatchingPropertyNames(
         $result = $this->subject->getRulesAssoc($searchPattern);
 
         foreach ($matchingPropertyNames as $expectedMatchingPropertyName) {
-            self::assertContains($expectedMatchingPropertyName, \array_keys($result));
+            self::assertArrayHasKey($expectedMatchingPropertyName, $result);
         }
     }