diff --git a/dkist/wcs/models.py b/dkist/wcs/models.py
index d213ba52..87e9b505 100644
--- a/dkist/wcs/models.py
+++ b/dkist/wcs/models.py
@@ -669,7 +669,6 @@ def inverse(self):
 
         return step1 | step2
 
-
     def _calculate_separability_matrix(self):
         sepleft = separable._separable(self.left)
         sepright = separable._separable(self.right)