diff --git a/src/cmd/compile/fmt_test.go b/src/cmd/compile/fmt_test.go
index 65f88dfff9..6dfdea1a34 100644
--- a/src/cmd/compile/fmt_test.go
+++ b/src/cmd/compile/fmt_test.go
@@ -583,7 +583,6 @@ var knownFormats = map[string]string{
 	"*cmd/compile/internal/ssa.sparseTreeMapEntry %v": "",
 	"*cmd/compile/internal/types.Field %p":            "",
 	"*cmd/compile/internal/types.Field %v":            "",
-	"*cmd/compile/internal/types.Sym %+v":             "",
 	"*cmd/compile/internal/types.Sym %0S":             "",
 	"*cmd/compile/internal/types.Sym %S":              "",
 	"*cmd/compile/internal/types.Sym %p":              "",