diff --git a/requirements.txt b/requirements.txt
index c86db38..d64a70e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 pbr>=2.0.0,!=2.1.0
 alembic>=0.8.10
 oslo.config>=4.0.0
-oslo.db>=4.24.0
+oslo.db>=4.27.0
 python-subunit>=0.0.18
 six>=1.9.0
 SQLAlchemy>=1.0.10,!=1.1.5,!=1.1.6,!=1.1.7,!=1.1.8
diff --git a/subunit2sql/tests/migrations/test_migrations.py b/subunit2sql/tests/migrations/test_migrations.py
index 55d1d2e..483d0aa 100644
--- a/subunit2sql/tests/migrations/test_migrations.py
+++ b/subunit2sql/tests/migrations/test_migrations.py
@@ -93,7 +93,7 @@ class TestWalkMigrations(base.TestCase):
         revisions = list(script_dir.walk_revisions("base", "head"))
 
         if not revisions:
-            raise exc.DbMigrationError('There is no suitable migrations.')
+            raise exc.DBMigrationError('There is no suitable migrations.')
 
         for rev in list(reversed(revisions)):
             # Destination, current