diff --git a/file_server_test.go b/file_server_test.go
index 0401002..0549b7a 100644
--- a/file_server_test.go
+++ b/file_server_test.go
@@ -43,6 +43,7 @@ func TestFileServer(t *testing.T) {
 	}
 
 	for i, tt := range tbl {
+		tt := tt
 		t.Run(strconv.Itoa(i), func(t *testing.T) {
 			req, err := http.NewRequest("GET", ts.URL+tt.req, nil)
 			require.NoError(t, err)