diff --git a/migra/changes.py b/migra/changes.py
index d8d7963..73dab48 100644
--- a/migra/changes.py
+++ b/migra/changes.py
@@ -240,7 +240,9 @@ def get_table_changes(
             rls_alter = v.alter_rls_statement
             statements.append(rls_alter)
 
-    seq_created, seq_dropped, seq_modified, _ = differences(sequences_from, sequences_target)
+    seq_created, seq_dropped, seq_modified, _ = differences(
+        sequences_from, sequences_target
+    )
 
     for k in seq_created:
         seq_b = sequences_target[k]
@@ -472,12 +474,12 @@ class Changes(object):
                 self.i_target.enums,
             )
 
-        elif name == 'sequences':
+        elif name == "sequences":
             return partial(
                 statements_for_changes,
                 getattr(self.i_from, name),
                 getattr(self.i_target, name),
-                modifications=False
+                modifications=False,
             )
 
         elif name in THINGS:
diff --git a/migra/migra.py b/migra/migra.py
index 68e20ef..ac04acb 100644
--- a/migra/migra.py
+++ b/migra/migra.py
@@ -1,8 +1,7 @@
 from __future__ import unicode_literals
 
-from sqlbag import raw_execute
-
 from schemainspect import DBInspector, get_inspector
+from sqlbag import raw_execute
 
 from .changes import Changes
 from .statements import Statements
diff --git a/tests/test_migra.py b/tests/test_migra.py
index 55a80c3..744c784 100644
--- a/tests/test_migra.py
+++ b/tests/test_migra.py
@@ -3,11 +3,11 @@ from __future__ import unicode_literals
 import io
 
 from pytest import raises
+from schemainspect import get_inspector
 from sqlbag import S, load_sql_from_file, temporary_database
 
 from migra import Migration, Statements, UnsafeMigrationException
 from migra.command import parse_args, run
-from schemainspect import get_inspector
 
 SQL = """select 1;