diff --git a/server/src/main/java/org/elasticsearch/index/query/IntervalQueryBuilder.java b/server/src/main/java/org/elasticsearch/index/query/IntervalQueryBuilder.java
index 4813adfc4d3..7e94b5da691 100644
--- a/server/src/main/java/org/elasticsearch/index/query/IntervalQueryBuilder.java
+++ b/server/src/main/java/org/elasticsearch/index/query/IntervalQueryBuilder.java
@@ -55,6 +55,14 @@ public class IntervalQueryBuilder extends AbstractQueryBuilder<IntervalQueryBuil
         this.sourceProvider = in.readNamedWriteable(IntervalsSourceProvider.class);
     }
 
+    public String getField() {
+        return field;
+    }
+
+    public IntervalsSourceProvider getSourceProvider() {
+        return sourceProvider;
+    }
+
     @Override
     protected void doWriteTo(StreamOutput out) throws IOException {
         out.writeString(field);
diff --git a/server/src/test/java/org/elasticsearch/index/query/IntervalQueryBuilderTests.java b/server/src/test/java/org/elasticsearch/index/query/IntervalQueryBuilderTests.java
index c5cfca0b7fe..5fd91848a70 100644
--- a/server/src/test/java/org/elasticsearch/index/query/IntervalQueryBuilderTests.java
+++ b/server/src/test/java/org/elasticsearch/index/query/IntervalQueryBuilderTests.java
@@ -143,6 +143,17 @@ public class IntervalQueryBuilderTests extends AbstractQueryTestCase<IntervalQue
         assertThat(query, instanceOf(IntervalQuery.class));
     }
 
+    @Override
+    public IntervalQueryBuilder mutateInstance(IntervalQueryBuilder instance) throws IOException {
+        if (randomBoolean()) {
+            return super.mutateInstance(instance); // just change name/boost
+        }
+        if (randomBoolean()) {
+            return new IntervalQueryBuilder(STRING_FIELD_NAME_2, instance.getSourceProvider());
+        }
+        return new IntervalQueryBuilder(STRING_FIELD_NAME, createRandomSource(0));
+    }
+
     public void testMatchInterval() throws IOException {
 
         String json = "{ \"intervals\" : " +