diff --git a/server/src/test/java/org/elasticsearch/index/mapper/ObjectMapperMergeTests.java b/server/src/test/java/org/elasticsearch/index/mapper/ObjectMapperMergeTests.java
index 0737dcb7cb5d2..5fefa915095ea 100644
--- a/server/src/test/java/org/elasticsearch/index/mapper/ObjectMapperMergeTests.java
+++ b/server/src/test/java/org/elasticsearch/index/mapper/ObjectMapperMergeTests.java
@@ -310,7 +310,21 @@ public void testMergeWithLimitRuntimeField() {
         assertEquals(3, mergedAdd0.mapperSize());
         assertEquals(4, mergedAdd1.mapperSize());
     }
+    public void testMergedMappingSubobjectsFalse() {
+        ObjectMapper mergeInto = new ObjectMapper.Builder("parent", Explicit.IMPLICIT_FALSE)
+            .build(MapperBuilderContext.root(false, false));
+        RootObjectMapper mergeWith= new RootObjectMapper.Builder("parent", Explicit.IMPLICIT_TRUE).add(
+            new ObjectMapper.Builder("child", Explicit.IMPLICIT_TRUE).add(
+                new KeywordFieldMapper.Builder("grandchild", IndexVersion.current())
+            )
+        ).build(MapperBuilderContext.root(false, false));
+        ObjectMapper merged = mergeInto.merge(mergeWith, MapperMergeContext.root(false, false, Long.MAX_VALUE));
+        ObjectMapper child = (ObjectMapper) merged.getMapper("child");
+        KeywordFieldMapper keywordFieldMapper = (KeywordFieldMapper) child.getMapper("grandchild");
 
+        assertNull(child);
+        assertNull(keywordFieldMapper);
+    }
     private static RootObjectMapper createRootSubobjectFalseLeafWithDots() {
         FieldMapper.Builder fieldBuilder = new KeywordFieldMapper.Builder("host.name", IndexVersion.current());
         FieldMapper fieldMapper = fieldBuilder.build(MapperBuilderContext.root(false, false));
@@ -352,4 +366,5 @@ private TextFieldMapper.Builder createTextKeywordMultiField(String name, String
         builder.multiFieldsBuilder.add(new KeywordFieldMapper.Builder(multiFieldName, IndexVersion.current()));
         return builder;
     }
+
 }