diff --git a/tests/test_series.py b/tests/test_series.py
index 627051266440b4fa1a4c65f0bac7bbc888c48aa3..54a564f1d8501673ea2f85bdfddc68cd63fae5a0 100644
--- a/tests/test_series.py
+++ b/tests/test_series.py
@@ -209,6 +209,9 @@ class TestSeries(unittest.TestCase):
         self.do_verify_series(series, 0, 1200)
         self.do_verify_series(series, 0, 1800)
         series.close()
+        from tempsdb.series import TimeSeries
+        series = TimeSeries('test.gz', 'test.gz')
+        series.close()
 
     def do_verify_series(self, series, start, stop):
         it = series.iterate_range(start, stop)