diff --git a/test/fixedbugs/issue27836.dir/Äfoo.go b/test/fixedbugs/issue27836.dir/Äfoo.go
deleted file mode 100644
index 8b6a814c3c..0000000000
--- a/test/fixedbugs/issue27836.dir/Äfoo.go
+++ /dev/null
@@ -1,13 +0,0 @@
-package Äfoo
-
-var ÄbarV int = 101
-
-func Äbar(x int) int {
-	defer func() { ÄbarV += 3 }()
-	return Äblix(x)
-}
-
-func Äblix(x int) int {
-	defer func() { ÄbarV += 9 }()
-	return ÄbarV + x
-}
diff --git a/test/fixedbugs/issue27836.dir/Ämain.go b/test/fixedbugs/issue27836.dir/Ämain.go
deleted file mode 100644
index 25d2c71fc0..0000000000
--- a/test/fixedbugs/issue27836.dir/Ämain.go
+++ /dev/null
@@ -1,13 +0,0 @@
-package main
-
-import (
-	"fmt"
-
-	"./Äfoo"
-	Äblix "./Äfoo"
-)
-
-func main() {
-	fmt.Printf("Äfoo.Äbar(33) returns %v\n", Äfoo.Äbar(33))
-	fmt.Printf("Äblix.Äbar(33) returns %v\n", Äblix.Äbar(33))
-}
diff --git a/test/fixedbugs/issue27836.dir/Þfoo.go b/test/fixedbugs/issue27836.dir/Þfoo.go
new file mode 100644
index 0000000000..ea6be0f49f
--- /dev/null
+++ b/test/fixedbugs/issue27836.dir/Þfoo.go
@@ -0,0 +1,17 @@
+// Copyright 2022 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package Þfoo
+
+var ÞbarV int = 101
+
+func Þbar(x int) int {
+	defer func() { ÞbarV += 3 }()
+	return Þblix(x)
+}
+
+func Þblix(x int) int {
+	defer func() { ÞbarV += 9 }()
+	return ÞbarV + x
+}
diff --git a/test/fixedbugs/issue27836.dir/Þmain.go b/test/fixedbugs/issue27836.dir/Þmain.go
new file mode 100644
index 0000000000..596c620d80
--- /dev/null
+++ b/test/fixedbugs/issue27836.dir/Þmain.go
@@ -0,0 +1,17 @@
+// Copyright 2022 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+
+import (
+	"fmt"
+
+	"./Þfoo"
+	Þblix "./Þfoo"
+)
+
+func main() {
+	fmt.Printf("Þfoo.Þbar(33) returns %v\n", Þfoo.Þbar(33))
+	fmt.Printf("Þblix.Þbar(33) returns %v\n", Þblix.Þbar(33))
+}