diff --git a/tests/phpunit/api/v3/SyntaxConformanceTest.php b/tests/phpunit/api/v3/SyntaxConformanceTest.php
index 38828c425716..348e958d931b 100644
--- a/tests/phpunit/api/v3/SyntaxConformanceTest.php
+++ b/tests/phpunit/api/v3/SyntaxConformanceTest.php
@@ -128,6 +128,8 @@ public function tearDown() {
         CRM_Core_DAO::deleteTestObjects($entityName, ['id' => $entityID]);
       }
     }
+    $this->deletableTestObjects = [];
+    parent::tearDown();
   }
 
   /**