diff --git a/tests/test_create_packages_json.py b/tests/test_create_packages_json.py
index df109e71..a4ab70cc 100644
--- a/tests/test_create_packages_json.py
+++ b/tests/test_create_packages_json.py
@@ -50,7 +50,7 @@ class TestPackagesJson(TestCase):
             file_name = PackagesGenerator.get_remote_file_content(
                 file_url='fakeurl')
             mock_requests_get.assert_called_once_with(url='fakeurl')
-            mock_tempfile.assert_called_once_with(delete=False)
+            mock_tempfile.assert_called_once_with(delete=True)
             mock_tempfile.return_value.__enter__().\
                 write.assert_called_once_with(b'TestContent')
             self.assertEqual(