1 files changed, 7 insertions, 0 deletions
diff --git a/src/google/protobuf/unknown_field_set_unittest.cc b/src/google/protobuf/unknown_field_set_unittest.cc
index aaaa2e89..6bba8fc7 100644
--- a/src/google/protobuf/unknown_field_set_unittest.cc
+++ b/src/google/protobuf/unknown_field_set_unittest.cc
@@ -482,6 +482,13 @@ TEST_F(UnknownFieldSetTest, UnknownEnumValue) {
   }
 }
 
+TEST_F(UnknownFieldSetTest, SpaceUsedExcludingSelf) {
+  UnknownFieldSet empty;
+  empty.AddVarint(1, 0);
+  EXPECT_EQ(/* vector<UnknownField> */ 24 + /* sizeof(UnknownField) */ 16,
+            empty.SpaceUsedExcludingSelf());
+}
+
 TEST_F(UnknownFieldSetTest, SpaceUsed) {
   unittest::TestEmptyMessage empty_message;