diff --git a/core/src/test/java/org/elasticsearch/index/query/BaseQueryTestCase.java b/core/src/test/java/org/elasticsearch/index/query/BaseQueryTestCase.java
index 1d4753e20e7..c741f4ae384 100644
--- a/core/src/test/java/org/elasticsearch/index/query/BaseQueryTestCase.java
+++ b/core/src/test/java/org/elasticsearch/index/query/BaseQueryTestCase.java
@@ -150,6 +150,7 @@ public abstract class BaseQueryTestCase<QB extends QueryBuilder<QB>> extends Ela
         index = null;
         queryParserService = null;
         currentTypes = null;
+        namedWriteableRegistry = null;
     }
 
     @Before