diff --git a/test/fixedbugs/issue27836.dir/Äfoo.go b/test/fixedbugs/issue27836.dir/Äfoo.go
new file mode 100644
index 0000000000..8b6a814c3c
--- /dev/null
+++ b/test/fixedbugs/issue27836.dir/Äfoo.go
@@ -0,0 +1,13 @@
+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
new file mode 100644
index 0000000000..25d2c71fc0
--- /dev/null
+++ b/test/fixedbugs/issue27836.dir/Ämain.go
@@ -0,0 +1,13 @@
+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.go b/test/fixedbugs/issue27836.go
new file mode 100644
index 0000000000..128cf9d06a
--- /dev/null
+++ b/test/fixedbugs/issue27836.go
@@ -0,0 +1,7 @@
+// compiledir
+
+// Copyright 2018 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 ignored
diff --git a/test/run.go b/test/run.go
index d0dccb4f23..3af6d1466b 100644
--- a/test/run.go
+++ b/test/run.go
@@ -321,7 +321,7 @@ func goDirFiles(longdir string) (filter []os.FileInfo, err error) {
 	return
 }
 
-var packageRE = regexp.MustCompile(`(?m)^package (\w+)`)
+var packageRE = regexp.MustCompile(`(?m)^package ([\p{Lu}\p{Ll}\w]+)`)
 
 // If singlefilepkgs is set, each file is considered a separate package
 // even if the package names are the same.