diff --git a/config/default_test.go b/config/default_test.go
index 0ee8d84a..93048d56 100644
--- a/config/default_test.go
+++ b/config/default_test.go
@@ -12,10 +12,6 @@ import (
 	"github.com/micro/go-micro/v2/config/source/file"
 )
 
-var (
-	sep = string(os.PathSeparator)
-)
-
 func createFileForIssue18(t *testing.T, content string) *os.File {
 	data := []byte(content)
 	path := filepath.Join(os.TempDir(), fmt.Sprintf("file.%d", time.Now().UnixNano()))