diff --git a/glance_store/_drivers/cinder/nfs.py b/glance_store/_drivers/cinder/nfs.py
index 0e092d26..58631972 100644
--- a/glance_store/_drivers/cinder/nfs.py
+++ b/glance_store/_drivers/cinder/nfs.py
@@ -53,7 +53,7 @@ class NfsBrickConnector(base.BaseBrickConnectorInterface):
 
     @staticmethod
     def get_hash_str(base_str):
-        """Returns string that represents SHA256 hash of base_str (in hex format).
+        """Returns string representing SHA256 hash of base_str in hex format.
 
         If base_str is a Unicode string, encode it to UTF-8.
         """
diff --git a/glance_store/tests/unit/cinder/test_base.py b/glance_store/tests/unit/cinder/test_base.py
index 7c0add56..304d09da 100644
--- a/glance_store/tests/unit/cinder/test_base.py
+++ b/glance_store/tests/unit/cinder/test_base.py
@@ -38,7 +38,7 @@ class TestConnectorBase(test_base.StoreBaseTest):
     def test_factory(self, protocol, expected_class):
         connector_class = base.factory(
             connection_info={'driver_volume_type': protocol})
-        self.assertTrue(isinstance(connector_class, expected_class))
+        self.assertIsInstance(connector_class, expected_class)
 
 
 class TestBaseBrickConnectorInterface(test_base.StoreBaseTest):
diff --git a/glance_store/tests/unit/cinder/test_cinder_base.py b/glance_store/tests/unit/cinder/test_cinder_base.py
index 3269de11..52a36660 100644
--- a/glance_store/tests/unit/cinder/test_cinder_base.py
+++ b/glance_store/tests/unit/cinder/test_cinder_base.py
@@ -766,7 +766,7 @@ class TestCinderStoreBase(object):
 
             mock_wait.side_effect = [fake_volume, exceptions.BackendException]
             self.assertRaises(
-                Exception, self.store.add, expected_image_id,  # noqa
+                exceptions.StorageFull, self.store.add, expected_image_id,
                 image_file, expected_size, self.hash_algo, self.context,
                 verifier)
             fake_volume.delete.assert_called_once()
diff --git a/requirements.txt b/requirements.txt
index ffd4fd71..9d7adfea 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,3 @@
-# The order of packages is significant, because pip processes them in the order
-# of appearance. Changing the order has an impact on the overall integration
-# process, which may cause wedges in the gate later.
 oslo.config>=5.2.0 # Apache-2.0
 oslo.i18n>=3.15.3 # Apache-2.0
 oslo.serialization!=2.19.1,>=2.18.0 # Apache-2.0
diff --git a/test-requirements.txt b/test-requirements.txt
index 2eaa2262..edec4cbb 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,8 +1,4 @@
-# The order of packages is significant, because pip processes them in the order
-# of appearance. Changing the order has an impact on the overall integration
-# process, which may cause wedges in the gate later.
-# Metrics and style
-hacking>=3.0.1,<3.1.0 # Apache-2.0
+hacking>=6.1.0,<6.2.0 # Apache-2.0
 
 # Documentation style
 doc8>=0.6.0 # Apache-2.0