diff --git a/ec2api/api/availability_zone.py b/ec2api/api/availability_zone.py
index c6a1c284..99cc59b0 100644
--- a/ec2api/api/availability_zone.py
+++ b/ec2api/api/availability_zone.py
@@ -120,7 +120,9 @@ def describe_regions(context, region_name=None, filter=None):
             regions.append({'regionName': name,
                             'regionEndpoint': endpoint})
     else:
-        regions = [{'regionName': 'nova',
+        # NOTE(andrey-mp): RegionOne is a default region name that is used
+        # in keystone, nova and some other projects
+        regions = [{'regionName': 'RegionOne',
                     'regionEndpoint': '%s://%s:%s%s' % (CONF.ec2_scheme,
                                                         CONF.ec2_host,
                                                         CONF.ec2_port,
diff --git a/ec2api/tests/functional/botocoreclient.py b/ec2api/tests/functional/botocoreclient.py
index d575955c..848be8c2 100644
--- a/ec2api/tests/functional/botocoreclient.py
+++ b/ec2api/tests/functional/botocoreclient.py
@@ -20,7 +20,7 @@ from oslo_config import types
 def _get_client(client_name, url, region, access, secret, ca_bundle):
     connection_data = {
         'config_file': (None, 'AWS_CONFIG_FILE', None, None),
-        'region': ('region', 'BOTO_DEFAULT_REGION', region, None),
+        'region': ('region', 'AWS_DEFAULT_REGION', region, None),
     }
     session = botocore.session.get_session(connection_data)
     kwargs = {
diff --git a/ec2api/tests/unit/test_availability_zone.py b/ec2api/tests/unit/test_availability_zone.py
index 0a33d553..b7a971a4 100644
--- a/ec2api/tests/unit/test_availability_zone.py
+++ b/ec2api/tests/unit/test_availability_zone.py
@@ -56,7 +56,7 @@ class AvailabilityZoneCase(base.ApiTestCase):
 
     def test_regions(self):
         resp = self.execute('DescribeRegions', {})
-        self.assertEqual(resp['regionInfo'][0]['regionName'], 'nova')
+        self.assertEqual(resp['regionInfo'][0]['regionName'], 'RegionOne')
         self.assertTrue(resp['regionInfo'][0].get('regionEndpoint')
                         is not None)