diff --git a/tests/functional/case-hack.sh b/tests/functional/case-hack.sh
index fbc8242ff..48a2ab13f 100755
--- a/tests/functional/case-hack.sh
+++ b/tests/functional/case-hack.sh
@@ -4,18 +4,19 @@ source common.sh
 
 clearStore
 
-rm -rf $TEST_ROOT/case
+rm -rf "$TEST_ROOT/case"
 
-opts="--option use-case-hack true"
+opts=("--option" "use-case-hack" "true")
 
 # Check whether restoring and dumping a NAR that contains case
 # collisions is round-tripping, even on a case-insensitive system.
-nix-store $opts  --restore $TEST_ROOT/case < case.nar
-nix-store $opts --dump $TEST_ROOT/case > $TEST_ROOT/case.nar
-cmp case.nar $TEST_ROOT/case.nar
-[ "$(nix-hash $opts --type sha256 $TEST_ROOT/case)" = "$(nix-hash --flat --type sha256 case.nar)" ]
+
+nix-store "${opts[@]}" --restore "$TEST_ROOT/case" < case.nar
+nix-store "${opts[@]}" --dump "$TEST_ROOT/case" > "$TEST_ROOT/case.nar"
+cmp case.nar "$TEST_ROOT/case.nar"
+[ "$(nix-hash "${opts[@]}" --type sha256 "$TEST_ROOT/case")" = "$(nix-hash --flat --type sha256 case.nar)" ]
 
 # Check whether we detect true collisions (e.g. those remaining after
 # removal of the suffix).
 touch "$TEST_ROOT/case/xt_CONNMARK.h~nix~case~hack~3"
-(! nix-store $opts --dump $TEST_ROOT/case > /dev/null)
+(! nix-store "${opts[@]}" --dump "$TEST_ROOT/case" > /dev/null)