diff --git a/Tests/varLib/interpolatable_test.py b/Tests/varLib/interpolatable_test.py
index a20aee10a..354b059a1 100644
--- a/Tests/varLib/interpolatable_test.py
+++ b/Tests/varLib/interpolatable_test.py
@@ -134,12 +134,10 @@ class InterpolatableTest(unittest.TestCase):
         # without --ignore-missing
         problems = interpolatable_main(["--quiet"] + ttf_paths)
         self.assertEqual(
-            problems["a"], 
-            [{"type": "missing", "master": "SparseMasters-Medium"}]
+            problems["a"], [{"type": "missing", "master": "SparseMasters-Medium"}]
         )
         self.assertEqual(
-            problems["s"], 
-            [{"type": "missing", "master": "SparseMasters-Medium"}]
+            problems["s"], [{"type": "missing", "master": "SparseMasters-Medium"}]
         )
         self.assertEqual(
             problems["edotabove"],
@@ -172,12 +170,10 @@ class InterpolatableTest(unittest.TestCase):
         # without --ignore-missing
         problems = interpolatable_main(["--quiet"] + ufo_paths)
         self.assertEqual(
-            problems["a"], 
-            [{"type": "missing", "master": "SparseMasters-Medium"}]
+            problems["a"], [{"type": "missing", "master": "SparseMasters-Medium"}]
         )
         self.assertEqual(
-            problems["s"], 
-            [{"type": "missing", "master": "SparseMasters-Medium"}]
+            problems["s"], [{"type": "missing", "master": "SparseMasters-Medium"}]
         )
         self.assertEqual(
             problems["edotabove"],
@@ -208,12 +204,10 @@ class InterpolatableTest(unittest.TestCase):
 
         problems = interpolatable_main(["--quiet", designspace_path])
         self.assertEqual(
-            problems["a"], 
-            [{"type": "missing", "master": "SparseMasters-Medium"}]
+            problems["a"], [{"type": "missing", "master": "SparseMasters-Medium"}]
         )
         self.assertEqual(
-            problems["s"], 
-            [{"type": "missing", "master": "SparseMasters-Medium"}]
+            problems["s"], [{"type": "missing", "master": "SparseMasters-Medium"}]
         )
         self.assertEqual(
             problems["edotabove"],
@@ -232,12 +226,10 @@ class InterpolatableTest(unittest.TestCase):
 
         problems = interpolatable_main(["--quiet", glyphsapp_path])
         self.assertEqual(
-            problems["a"], 
-            [{"type": "missing", "master": "Sparse Masters-Medium"}]
+            problems["a"], [{"type": "missing", "master": "Sparse Masters-Medium"}]
         )
         self.assertEqual(
-            problems["s"], 
-            [{"type": "missing", "master": "Sparse Masters-Medium"}]
+            problems["s"], [{"type": "missing", "master": "Sparse Masters-Medium"}]
         )
         self.assertEqual(
             problems["edotabove"],