diff --git a/conformance/failure_list_java_lite.txt b/conformance/failure_list_java_lite.txt
index 39a0f21..1494114 100644
--- a/conformance/failure_list_java_lite.txt
+++ b/conformance/failure_list_java_lite.txt
@@ -6,7 +6,3 @@
 
 Required.*.ProtobufInput.PrematureEofInDelimitedDataForKnownNonRepeatedValue.MESSAGE                               # Should have failed to parse, but didn't.
 Required.*.ProtobufInput.PrematureEofInDelimitedDataForKnownRepeatedValue.MESSAGE                                  # Should have failed to parse, but didn't.
-Required.*.ProtobufInput.UnmatchedEndGroup                                                                         # Should have failed to parse, but didn't.
-Required.*.ProtobufInput.UnmatchedEndGroupUnknown                                                                  # Should have failed to parse, but didn't.
-Required.*.ProtobufInput.UnmatchedEndGroupWithData                                                                 # Should have failed to parse, but didn't.
-Required.*.ProtobufInput.UnmatchedEndGroupWrongType                                                                # Should have failed to parse, but didn't.
diff --git a/java/core/src/main/java/com/google/protobuf/UnknownFieldSchema.java b/java/core/src/main/java/com/google/protobuf/UnknownFieldSchema.java
index 80602b1..5e2683d 100644
--- a/java/core/src/main/java/com/google/protobuf/UnknownFieldSchema.java
+++ b/java/core/src/main/java/com/google/protobuf/UnknownFieldSchema.java
@@ -93,6 +93,9 @@
         addGroup(unknownFields, fieldNumber, toImmutable(subFields));
         return true;
       case WireFormat.WIRETYPE_END_GROUP:
+        if (currentDepth == 0) {
+          throw InvalidProtocolBufferException.invalidEndTag();
+        }
         return false;
       default:
         throw InvalidProtocolBufferException.invalidWireType();