diff --git a/src/maps/maps_test.go b/src/maps/maps_test.go
index a7a8c10f71..bab884ef35 100644
--- a/src/maps/maps_test.go
+++ b/src/maps/maps_test.go
@@ -234,8 +234,6 @@ func TestCloneWithMapAssign(t *testing.T) {
 	}
 }
 
-var keysArr []int
-
 func BenchmarkKeys(b *testing.B) {
 	m := make(map[int]int, 1000000)
 	for i := 0; i < 1000000; i++ {