Switch to side-by-side view

--- a/pyforge/flyway/tests/test_migrations.py
+++ b/pyforge/flyway/tests/test_migrations.py
@@ -14,6 +14,10 @@
             '-u', 'mim:///pyforge',
             ]
         self.cmd.run(self.args + ['--reset'])
+
+    def tearDown(self):
+        from flyway import runner
+        runner.MIGRATION_GRAPH = None
 
     def test_simple(self):
         self.cmd.run(self.args)