diff --git a/superset/migrations/versions/4736ec66ce19_.py b/superset/migrations/versions/4736ec66ce19_.py
index 2d560d57dfd21..de86a392292ad 100644
--- a/superset/migrations/versions/4736ec66ce19_.py
+++ b/superset/migrations/versions/4736ec66ce19_.py
@@ -34,11 +34,10 @@
     sa.Column('datasource_name', sa.String(255)),
 )
 
-bind = op.get_bind()
-insp = sa.engine.reflection.Inspector.from_engine(bind)
-
 
 def upgrade():
+    bind = op.get_bind()
+    insp = sa.engine.reflection.Inspector.from_engine(bind)
 
     # Add the new less restrictive uniqueness constraint.
     with op.batch_alter_table('datasources', naming_convention=conv) as batch_op:
@@ -114,6 +113,8 @@ def upgrade():
 
 
 def downgrade():
+    bind = op.get_bind()
+    insp = sa.engine.reflection.Inspector.from_engine(bind)
 
     # Add the new more restrictive uniqueness constraint which is required by
     # the foreign key constraints. Note this operation will fail if the