diff --git a/tests/functional/fetchPath.sh b/tests/functional/fetchPath.sh
index e466e4494..560a270c1 100755
--- a/tests/functional/fetchPath.sh
+++ b/tests/functional/fetchPath.sh
@@ -2,7 +2,7 @@
 
 source common.sh
 
-touch $TEST_ROOT/foo -t 202211111111
+touch "$TEST_ROOT/foo" -t 202211111111
 # We only check whether 2022-11-1* **:**:** is the last modified date since
 # `lastModified` is transformed into UTC in `builtins.fetchTarball`.
 [[ "$(nix eval --impure --raw --expr "(builtins.fetchTree \"path://$TEST_ROOT/foo\").lastModifiedDate")" =~ 2022111.* ]]