diff --git a/testsuite/MDAnalysisTests/coordinates/test_xdr.py b/testsuite/MDAnalysisTests/coordinates/test_xdr.py
index 5de0447eb9..6f768cd6e1 100644
--- a/testsuite/MDAnalysisTests/coordinates/test_xdr.py
+++ b/testsuite/MDAnalysisTests/coordinates/test_xdr.py
@@ -892,9 +892,7 @@ def test_unsupported_format(self, traj):
 
     @pytest.mark.skipif(get_userid() == 0, reason="cannot readonly as root")
     def test_persistent_offsets_readonly(self, tmpdir):
-        test_file = Path(self.filename)
-        tmp_path = str(tmpdir)
-        shutil.copy(test_file, tmp_path)
+        shutil.copy(self.filename, str(tmpdir))
 
         if os.name == 'nt':
             # Windows platform has a unique way to deny write access