diff --git a/tests/functional/check-reqs.sh b/tests/functional/check-reqs.sh
deleted file mode 100644
index 367f2668e..000000000
--- a/tests/functional/check-reqs.sh
+++ /dev/null
@@ -1,24 +0,0 @@
-source common.sh
-
-clearStore
-
-RESULT=$TEST_ROOT/result
-
-nix-build -o $RESULT check-reqs.nix -A test1
-
-(! nix-build -o "$RESULT" check-reqs.nix -A test2)
-(! nix-build -o "$RESULT" check-reqs.nix -A test3)
-(! nix-build -o "$RESULT" check-reqs.nix -A test4) 2>&1 | grepQuiet 'check-reqs-dep1'
-(! nix-build -o "$RESULT" check-reqs.nix -A test4) 2>&1 | grepQuiet 'check-reqs-dep2'
-(! nix-build -o "$RESULT" check-reqs.nix -A test5)
-(! nix-build -o "$RESULT" check-reqs.nix -A test6)
-
-(! nix-build -o "$RESULT" check-reqs.nix -A test6) 2>&1 | grepQuiet '└───.*/.*-check-reqs-deps'
-(! nix-build -o "$RESULT" check-reqs.nix -A test6) 2>&1 | grepQuiet 'check-reqs-dep1'
-(! nix-build -o "$RESULT" check-reqs.nix -A test6) 2>&1 | grepQuiet 'check-reqs-dep2'
-
-nix-build -o $RESULT check-reqs.nix -A test7
-
-# ignoreSelfRefs is only true for drvs using structuredAttrs.
-(! nix-build -o $RESULT check-reqs.nix -A test8)
-nix-build -o $RESULT check-reqs.nix -A test9
diff --git a/tests/functional/meson.build b/tests/functional/meson.build
index 527ed368f..98fcb6722 100644
--- a/tests/functional/meson.build
+++ b/tests/functional/meson.build
@@ -71,7 +71,6 @@ functional_tests_scripts = [
   'readfile-context.sh',
   'nix-channel.sh',
   'dependencies.sh',
-  'check-reqs.sh',
   'build-remote-content-addressed-fixed.sh',
   'nar-access.sh',
   'repl.sh',
diff --git a/tests/functional/check-reqs.nix b/tests/functional2/build/assets/check-reqs.nix
similarity index 100%
rename from tests/functional/check-reqs.nix
rename to tests/functional2/build/assets/check-reqs.nix
diff --git a/tests/functional2/build/test_check_reqs.py b/tests/functional2/build/test_check_reqs.py
new file mode 100644
index 000000000..37bd41dfc
--- /dev/null
+++ b/tests/functional2/build/test_check_reqs.py
@@ -0,0 +1,57 @@
+import pytest
+from pathlib import Path
+from testlib.fixtures.nix import Nix
+from testlib.fixtures.file_helper import CopyFile
+from testlib.utils import get_global_asset
+from testlib.fixtures.file_helper import with_files
+import re
+
+check_req_files = {
+    "check-reqs.nix": CopyFile("assets/check-reqs.nix"),
+    "config.nix": get_global_asset("config.nix"),
+}
+
+
+@with_files(check_req_files)
+@pytest.mark.parametrize("attr", ["test1", "test7", "test9"])
+def test_good(nix: Nix, files: Path, attr: str):
+    result = files / "result"
+    nix.nix_build(["-o", result, "check-reqs.nix", "-A", attr]).run().ok()
+
+    assert result.exists()
+
+
+@with_files(check_req_files)
+@pytest.mark.parametrize(
+    "attr",
+    [
+        "test2",
+        "test3",
+        "test5",
+        "test8",  # ignoreSelfRefs is only true for drvs using structuredAttrs.
+    ],
+)
+def test_bad(nix: Nix, files: Path, attr: str):
+    res = nix.nix_build(["-o", files / "result", "check-reqs.nix", "-A", attr]).run().expect(1)
+
+    assert "Shown below are chains that lead to the forbidden path(s)." in res.stderr_plain
+    assert "is not allowed to refer to the following paths:" in res.stderr_plain
+
+
+@with_files(check_req_files)
+@pytest.mark.parametrize(
+    ("attr", "bad_refs"),
+    [
+        ("test4", ["check-reqs-dep1", "check-reqs-dep2"]),
+        ("test6", ["check-reqs-dep1", "check-reqs-dep2", "└───.*/.*-check-reqs-deps"]),
+    ],
+)
+def test_bad_deps(nix: Nix, files: Path, attr: str, bad_refs: list[str]):
+    res = nix.nix_build(["-o", files / "result", "check-reqs.nix", "-A", attr]).run().expect(1)
+    err = res.stderr_plain
+
+    assert "Shown below are chains that lead to the forbidden path(s)." in err
+    assert "is not allowed to refer to the following paths:" in err
+
+    for bad_ref in bad_refs:
+        assert re.search(bad_ref, err)