diff --git a/g/os/gfpool/gfpool_z_unit_test.go b/g/os/gfpool/gfpool_z_unit_test.go
index ab0506110..79a200321 100644
--- a/g/os/gfpool/gfpool_z_unit_test.go
+++ b/g/os/gfpool/gfpool_z_unit_test.go
@@ -9,10 +9,6 @@ import (
 	"time"
 )
 
-var (
-	testErrFile = "errorPath"
-)
-
 func TestOpen(t *testing.T) {
 	testFile := start("TestOpen.txt")
 
@@ -35,8 +31,8 @@ func TestOpen(t *testing.T) {
 }
 
 func TestOpenErr(t *testing.T) {
-
 	gtest.Case(t, func() {
+		testErrFile := "errorPath"
 		_, err := gfpool.Open(testErrFile, os.O_RDWR, 0666)
 		gtest.AssertNE(err, nil)
 	})