diff --git a/test/Serialization/macros.swift b/test/Serialization/macros.swift
index 4933762698d3f..e700da4b6528b 100644
--- a/test/Serialization/macros.swift
+++ b/test/Serialization/macros.swift
@@ -21,7 +21,7 @@ func test(a: Int, b: Int) {
 
 struct TestStruct {
   @myWrapper var x: Int
-  // expected-error@-1{{expansion of macro 'myWrapper' did not produce a non-observing accessor}}
+  // expected-error@-1{{expansion of macro 'myWrapper()' did not produce a non-observing accessor}}
 }
 
 @ArbitraryMembers