diff --git a/tests/migrations/test_graph.py b/tests/migrations/test_graph.py
index 3e066ed1f36..a4e01d5b017 100644
--- a/tests/migrations/test_graph.py
+++ b/tests/migrations/test_graph.py
@@ -139,9 +139,9 @@ class GraphTests(TestCase):
         graph.add_node(('A', '0001'), None)
         graph.add_node(('C', '0001'), None)
         graph.add_node(('B', '0001'), None)
-        graph.add_dependency('A.0001', ('A', '0001'),('B', '0001'))
-        graph.add_dependency('B.0001', ('B', '0001'),('A', '0001'))
-        graph.add_dependency('C.0001', ('C', '0001'),('B', '0001'))
+        graph.add_dependency('A.0001', ('A', '0001'), ('B', '0001'))
+        graph.add_dependency('B.0001', ('B', '0001'), ('A', '0001'))
+        graph.add_dependency('C.0001', ('C', '0001'), ('B', '0001'))
 
         self.assertRaises(
             CircularDependencyError,