diff --git a/test/files/neg/t12159.check b/test/files/neg/t12159.check
index 178017725d11..bda2e48622ce 100644
--- a/test/files/neg/t12159.check
+++ b/test/files/neg/t12159.check
@@ -1,4 +1,7 @@
-s.scala:11: error: not found: type ZZ
-class Z extends ZZ // fail compile: remove when source flags are restored
+s.scala:5: error: illegal inheritance from sealed class H
+class S extends H {
                 ^
-1 error
+s.scala:8: error: illegal inheritance from sealed trait I
+trait T extends I {
+                ^
+2 errors
diff --git a/test/files/neg/t12159/s.scala b/test/files/neg/t12159/s.scala
index 58a01877e3c3..b8ec52070d07 100644
--- a/test/files/neg/t12159/s.scala
+++ b/test/files/neg/t12159/s.scala
@@ -7,5 +7,3 @@ class S extends H {
 
 trait T extends I {
 }
-
-class Z extends ZZ // fail compile: remove when source flags are restored