diff --git a/checkbox-support/checkbox_support/tests/test_run_watcher.py b/checkbox-support/checkbox_support/tests/test_run_watcher.py
index ba36741aca..9386dfbcf5 100644
--- a/checkbox-support/checkbox_support/tests/test_run_watcher.py
+++ b/checkbox-support/checkbox_support/tests/test_run_watcher.py
@@ -318,7 +318,7 @@ def test_usb_storage_parse_journal_line(self):
         mock_usb_storage = MagicMock()
         USBStorage._parse_journal_line(mock_usb_storage, line_str)
         self.assertEqual(mock_usb_storage.action, "insertion")
-        
+
         line_str = "USB disconnect, device"
         mock_usb_storage = MagicMock()
         USBStorage._parse_journal_line(mock_usb_storage, line_str)