diff --git a/tests/functional/meson.build b/tests/functional/meson.build
index efaf33954..7b71cac4c 100644
--- a/tests/functional/meson.build
+++ b/tests/functional/meson.build
@@ -103,7 +103,6 @@ functional_tests_scripts = [
   'selfref-gc.sh',
   'db-migration.sh',
   'bash-profile.sh',
-  'pass-as-file.sh',
   'store-ping.sh',
   'flakes/show.sh',
   'path-from-hash-part.sh',
diff --git a/tests/functional/pass-as-file.sh b/tests/functional/pass-as-file.sh
deleted file mode 100644
index 2c0bc5031..000000000
--- a/tests/functional/pass-as-file.sh
+++ /dev/null
@@ -1,18 +0,0 @@
-source common.sh
-
-clearStore
-
-outPath=$(nix-build --no-out-link -E "
-with import ./config.nix;
-
-mkDerivation {
-  name = \"pass-as-file\";
-  passAsFile = [ \"foo\" ];
-  foo = [ \"xyzzy\" ];
-  builder = builtins.toFile \"builder.sh\" ''
-    [ \"\$(basename \$fooPath)\" = .attr-1bp7cri8hplaz6hbz0v4f0nl44rl84q1sg25kgwqzipzd1mv89ic ]
-    [ \"\$(cat \$fooPath)\" = xyzzy ]
-    touch \$out
-  '';
-}
-")
diff --git a/tests/functional2/build/test_pass_as_file.py b/tests/functional2/build/test_pass_as_file.py
new file mode 100644
index 000000000..6ea193a58
--- /dev/null
+++ b/tests/functional2/build/test_pass_as_file.py
@@ -0,0 +1,26 @@
+from testlib.fixtures.nix import Nix
+from testlib.utils import get_global_asset
+from testlib.fixtures.file_helper import File, with_files
+
+
+@with_files(
+    {
+        "config.nix": get_global_asset("config.nix"),
+        "default.nix": File("""
+            with import ./config.nix;
+
+            mkDerivation {
+              name = "pass-as-file";
+              passAsFile = [ "foo" ];
+              foo = [ "xyzzy" ];
+              builder = builtins.toFile "builder.sh" ''
+                [ "$(basename $fooPath)" = .attr-1bp7cri8hplaz6hbz0v4f0nl44rl84q1sg25kgwqzipzd1mv89ic ]
+                [ "$(cat $fooPath)" = xyzzy ]
+                touch $out
+              '';
+            }
+        """),
+    }
+)
+def test_pass_as_file(nix: Nix):
+    nix.nix_build([]).run().ok()