diff --git a/glance_store/_drivers/cinder.py b/glance_store/_drivers/cinder.py
index 66829ea9..dceb512e 100644
--- a/glance_store/_drivers/cinder.py
+++ b/glance_store/_drivers/cinder.py
@@ -42,14 +42,11 @@ _CINDER_OPTS = [
                     'catalog. Format is : separated values of the form: '
                     '<service_type>:<service_name>:<endpoint_type>'),
     cfg.StrOpt('cinder_endpoint_template',
-               default=None,
                help='Override service catalog lookup with template for cinder '
                     'endpoint e.g. http://localhost:8776/v1/%(project_id)s'),
     cfg.StrOpt('os_region_name',
-               default=None,
                help='Region name of this node'),
     cfg.StrOpt('cinder_ca_certificates_file',
-               default=None,
                help='Location of ca certicates file to use for cinder client '
                     'requests.'),
     cfg.IntOpt('cinder_http_retries',
diff --git a/glance_store/_drivers/gridfs.py b/glance_store/_drivers/gridfs.py
index 5ce53700..1d858677 100644
--- a/glance_store/_drivers/gridfs.py
+++ b/glance_store/_drivers/gridfs.py
@@ -45,7 +45,7 @@ _GRIDFS_OPTS = [
                     "If host is an IPv6 literal it must be enclosed "
                     "in '[' and ']' characters following the RFC2732 "
                     "URL syntax (e.g. '[::1]' for localhost)"),
-    cfg.StrOpt('mongodb_store_db', default=None, help='Database to use'),
+    cfg.StrOpt('mongodb_store_db', help='Database to use'),
 ]
 
 
diff --git a/glance_store/_drivers/s3.py b/glance_store/_drivers/s3.py
index 97aa65bf..cc2f6d4d 100644
--- a/glance_store/_drivers/s3.py
+++ b/glance_store/_drivers/s3.py
@@ -85,10 +85,8 @@ _S3_OPTS = [
     cfg.IntOpt('s3_store_proxy_port', default=8080,
                help=_('The port to use when connecting over a proxy.')),
     cfg.StrOpt('s3_store_proxy_user',
-               default=None,
                help=_('The username to connect to the proxy.')),
     cfg.StrOpt('s3_store_proxy_password', secret=True,
-               default=None,
                help=_('The password to use when connecting over a proxy.'))
 ]
 
diff --git a/glance_store/_drivers/swift/store.py b/glance_store/_drivers/swift/store.py
index 2e86bd7b..bdf4bbde 100644
--- a/glance_store/_drivers/swift/store.py
+++ b/glance_store/_drivers/swift/store.py
@@ -62,7 +62,6 @@ _SWIFT_OPTS = [
                       'single tenant. This setting is only necessary if the '
                       'tenant has multiple swift endpoints.')),
     cfg.StrOpt('swift_store_endpoint',
-               default=None,
                help=_('If set, the configured endpoint will be used. If '
                       'None, the storage url from the auth response will be '
                       'used.')),
diff --git a/glance_store/common/config.py b/glance_store/common/config.py
index 3263176c..4d228c4b 100644
--- a/glance_store/common/config.py
+++ b/glance_store/common/config.py
@@ -107,7 +107,7 @@ common_opts = [
                 help=_("Deploy the v1 OpenStack Images API.")),
     cfg.BoolOpt('enable_v2_api', default=True,
                 help=_("Deploy the v2 OpenStack Images API.")),
-    cfg.StrOpt('pydev_worker_debug_host', default=None,
+    cfg.StrOpt('pydev_worker_debug_host',
                help=_('The hostname/IP of the pydev process listening for '
                       'debug connections')),
     cfg.IntOpt('pydev_worker_debug_port', default=5678,