diff --git a/glue/viewers/image/qt/tests/test_python_export.py b/glue/viewers/image/qt/tests/test_python_export.py
index e1dc77912..fcb32a1dd 100644
--- a/glue/viewers/image/qt/tests/test_python_export.py
+++ b/glue/viewers/image/qt/tests/test_python_export.py
@@ -9,6 +9,7 @@
 
 from astropy.wcs import WCS
 
+
 class TestExportPython(BaseTestExportPython):
 
     def setup_method(self, method):