diff --git a/cinder/volume/api.py b/cinder/volume/api.py
index 39e3efa5d51..ff98c9401f7 100644
--- a/cinder/volume/api.py
+++ b/cinder/volume/api.py
@@ -555,7 +555,7 @@ class API(base.Base):
                 if hasattr(e, 'msg'):
                     # ignore type (Exception has no attr "msg") error
                     msg = _("Unable to delete encryption key for "
-                            "volume: %s") % (e.msg)  # type: ignore
+                            "volume: %s") % (e.msg)
                 else:
                     msg = _("Unable to delete encryption key for volume.")
                 LOG.error(msg)
diff --git a/test-requirements.txt b/test-requirements.txt
index 10c8d6acb8a..0097afc5260 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -18,5 +18,5 @@ SQLAlchemy-Utils>=0.37.8 # BSD License
 testtools>=2.4.0 # MIT
 
 doc8>=0.8.1 # Apache-2.0
-mypy>=0.981 # MIT
+mypy>=1.0 # MIT
 moto>=2.2.5 # Apache-2.0