diff --git a/test/git-open.bats b/test/git-open.bats
index 1f8d4c3..32c0fe1 100755
--- a/test/git-open.bats
+++ b/test/git-open.bats
@@ -230,7 +230,8 @@ setup() {
 
 @test "basic: http url scheme is preserved" {
   git remote set-url origin "http://github.com/user/repo.git"
-  run ../git-open
+  # ignore any local config like: `url.https://github.com/.insteadof=http://github.com/`
+  GIT_CONFIG_NOSYSTEM=1 run ../git-open
   assert_output "http://github.com/user/repo"
 }