diff --git a/server/src/test/java/org/elasticsearch/index/mapper/IdFieldMapperTests.java b/server/src/test/java/org/elasticsearch/index/mapper/IdFieldMapperTests.java
index ea834a226da..ba2099acfc4 100644
--- a/server/src/test/java/org/elasticsearch/index/mapper/IdFieldMapperTests.java
+++ b/server/src/test/java/org/elasticsearch/index/mapper/IdFieldMapperTests.java
@@ -87,6 +87,7 @@ public class IdFieldMapperTests extends ESSingleNodeTestCase {
             throw new UnsupportedOperationException();
         }).build(null, null);
         assertWarnings(ID_FIELD_DATA_DEPRECATION_MESSAGE);
+        assertTrue(ft.isAggregatable());
 
         client().admin().cluster().prepareUpdateSettings()
             .setTransientSettings(Settings.builder().put(IndicesService.INDICES_ID_FIELD_DATA_ENABLED_SETTING.getKey(), false))
@@ -97,6 +98,7 @@ public class IdFieldMapperTests extends ESSingleNodeTestCase {
                     throw new UnsupportedOperationException();
                 }).build(null, null));
             assertThat(exc.getMessage(), containsString(IndicesService.INDICES_ID_FIELD_DATA_ENABLED_SETTING.getKey()));
+            assertFalse(ft.isAggregatable());
         } finally {
             // unset cluster setting
             client().admin().cluster().prepareUpdateSettings()
diff --git a/server/src/test/java/org/elasticsearch/index/mapper/IdFieldTypeTests.java b/server/src/test/java/org/elasticsearch/index/mapper/IdFieldTypeTests.java
index 70571e263ad..80ec691c0dd 100644
--- a/server/src/test/java/org/elasticsearch/index/mapper/IdFieldTypeTests.java
+++ b/server/src/test/java/org/elasticsearch/index/mapper/IdFieldTypeTests.java
@@ -67,4 +67,12 @@ public class IdFieldTypeTests extends ESTestCase {
         query = ft.termQuery("id", context);
         assertEquals(new TermInSetQuery("_id", Uid.encodeId("id")), query);
     }
+
+    public void testIsAggregatable() {
+        MappedFieldType ft = new IdFieldMapper.IdFieldType(() -> false);
+        assertFalse(ft.isAggregatable());
+
+        ft = new IdFieldMapper.IdFieldType(() -> true);
+        assertTrue(ft.isAggregatable());
+    }
 }