diff --git a/tests/functional/fetchGit.sh b/tests/functional/fetchGit.sh
index 7ebab2ab7..ba08cef7a 100755
--- a/tests/functional/fetchGit.sh
+++ b/tests/functional/fetchGit.sh
@@ -326,3 +326,4 @@ export GIT_CONFIG_GLOBAL="$TEST_ROOT/gitconfig"
 git config --global core.autocrlf true
 new_narhash=$(nix eval --raw --impure --expr "(builtins.fetchGit { url = \"$repo\"; ref = \"master\"; }).narHash")
 [[ "$new_narhash" = "$narhash" ]]
+unset GIT_CONFIG_GLOBAL