test names should start with test

Author: chriddyp

plotly/tests/test_core/test_image/test_image.py

@@ -63,6 +63,6 @@ def _test(self):
 
         _test = test_generator(*args)
         arg_string = ', '.join([str(a) for a in args])
-        test_name = test_generator.__name__.replace('generate', 'test')
+        test_name = test_generator.__name__.replace('_generate', 'test')
         test_name += '({})'.format(arg_string)
         setattr(TestImage, test_name, _test)