diff --git a/tests/functional/case-hack.sh b/tests/functional/case-hack.sh
deleted file mode 100644
index 61bf9b94b..000000000
--- a/tests/functional/case-hack.sh
+++ /dev/null
@@ -1,19 +0,0 @@
-source common.sh
-
-clearStore
-
-rm -rf $TEST_ROOT/case
-
-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)" ]
-
-# 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)
diff --git a/tests/functional/meson.build b/tests/functional/meson.build
index c46843fe1..2296070a9 100644
--- a/tests/functional/meson.build
+++ b/tests/functional/meson.build
@@ -100,7 +100,6 @@ functional_tests_scripts = [
   'eval-store.sh',
   'derivation-json.sh',
   'import-derivation.sh',
-  'case-hack.sh',
   'placeholders.sh',
   'ssh-relay.sh',
   'build.sh',
diff --git a/tests/functional/case.nar b/tests/functional2/store/assets/case.nar
similarity index 100%
rename from tests/functional/case.nar
rename to tests/functional2/store/assets/case.nar
diff --git a/tests/functional2/store/test_case_hack.py b/tests/functional2/store/test_case_hack.py
new file mode 100644
index 000000000..f66dfc291
--- /dev/null
+++ b/tests/functional2/store/test_case_hack.py
@@ -0,0 +1,51 @@
+from testlib.fixtures.nix import Nix
+from testlib.fixtures.file_helper import CopyFile, with_files
+
+files = {"case.nar": CopyFile("assets/case.nar")}
+
+opts = ["--option", "use-case-hack", "true"]
+
+expected = {
+    "x",
+    "x/FOO",
+    "x/Foo~nix~case~hack~1",
+    "x/foo~nix~case~hack~2",
+    "x/foo~nix~case~hack~2/A",
+    "x/foo~nix~case~hack~2/A/foo",
+    "x/foo~nix~case~hack~2/a~nix~case~hack~1",
+    "x/foo~nix~case~hack~2/a~nix~case~hack~1/foo",
+    "x/foo-1",
+    "x/foo0",
+    "xt_CONNMARK.h",
+    "xt_CONNmark.h~nix~case~hack~1",
+    "xt_connmark.h~nix~case~hack~2",
+}
+
+
+@with_files(files)
+def test_case_hack(nix: Nix):
+    nar_path = nix.env.dirs.home / "case.nar"
+    nar = nar_path.read_bytes()
+    out = nix.env.dirs.home / "case"
+
+    # Check whether restoring and dumping a NAR that contains case
+    # collisions is round-tripping, even on a case-insensitive system.
+    nix.nix_store([*opts, "--restore", out]).with_stdin(nar).run().ok()
+    assert set({str(p.relative_to(out)) for p in out.rglob("*")}) == expected
+
+    dumped = nix.nix_store([*opts, "--dump", out]).run().ok().stdout
+    assert dumped == nar
+
+    out_hash = nix.nix([*opts, "--type", "sha256", out], nix_exe="nix-hash").run().ok().stdout_plain
+    nar_hash = (
+        nix.nix(["--flat", "--type", "sha256", nar_path], nix_exe="nix-hash")
+        .run()
+        .ok()
+        .stdout_plain
+    )
+    assert out_hash == nar_hash
+
+    # Check whether we detect true collisions (e.g. those remaining after
+    # removal of the suffix).
+    (out / "xt_CONNMARK.h~nix~case~hack~3").write_text("")
+    assert "file name collision" in nix.nix_store([*opts, "--dump", out]).run().expect(1).stderr_s