diff --git a/tests/io/open_plus.py b/tests/io/open_plus.py
index e5530f2d52fa841807516dc54423a40cd49f86a6..98598ee67261e34d645c03e2285132218a35b61d 100644
--- a/tests/io/open_plus.py
+++ b/tests/io/open_plus.py
@@ -40,3 +40,9 @@ f.write(b"1234")
 f.seek(0)
 print(f.read())
 f.close()
+
+# cleanup
+try:
+    os.unlink("testfile")
+except OSError:
+    pass