diff --git a/os_client_config/cloud_config.py b/os_client_config/cloud_config.py
index 8e0b963..79a6ebf 100644
--- a/os_client_config/cloud_config.py
+++ b/os_client_config/cloud_config.py
@@ -299,15 +299,17 @@ class CloudConfig(object):
         if self._openstack_config:
             return self._openstack_config.get_cache_expiration()
 
-    def get_cache_resource_expiration(self, resource):
+    def get_cache_resource_expiration(self, resource, default=None):
         """Get expiration time for a resource
 
         :param resource: Name of the resource type
+        :param default: Default value to return if not found (optional,
+                        defaults to None)
 
-        :returns: Expiration time for the resource type or None
+        :returns: Expiration time for the resource type as float or default
         """
         if self._openstack_config:
             expiration = self._openstack_config.get_cache_expiration()
             if resource not in expiration:
-                return None
-            return expiration[resource]
+                return default
+            return float(expiration[resource])
diff --git a/os_client_config/config.py b/os_client_config/config.py
index fd28c69..8d2a2ee 100644
--- a/os_client_config/config.py
+++ b/os_client_config/config.py
@@ -246,13 +246,13 @@ class OpenStackConfig(object):
         return new_config
 
     def get_cache_expiration_time(self):
-        return self._cache_expiration_time
+        return int(self._cache_expiration_time)
 
     def get_cache_interval(self):
-        return self._cache_expiration_time
+        return self.get_cache_expiration_time()
 
     def get_cache_max_age(self):
-        return self._cache_expiration_time
+        return self.get_cache_expiration_time()
 
     def get_cache_path(self):
         return self._cache_path
diff --git a/os_client_config/tests/base.py b/os_client_config/tests/base.py
index 67c80f2..3d94e25 100644
--- a/os_client_config/tests/base.py
+++ b/os_client_config/tests/base.py
@@ -39,6 +39,13 @@ VENDOR_CONF = {
     }
 }
 USER_CONF = {
+    'cache': {
+        'max_age': '1',
+        'expiration': {
+            'server': 5,
+            'image': '7',
+        },
+    },
     'client': {
         'force_ipv4': True,
     },
@@ -104,7 +111,6 @@ USER_CONF = {
             'region_name': 'test-region',
         }
     },
-    'cache': {'max_age': 1},
 }
 NO_CONF = {
     'cache': {'max_age': 1},
@@ -155,3 +161,6 @@ class TestCase(base.BaseTestCase):
             self.assertEqual('testproject', cc.auth['project_name'])
         elif 'project_id' in cc.auth:
             self.assertEqual('testproject', cc.auth['project_id'])
+        self.assertEqual(cc.get_cache_expiration_time(), 1)
+        self.assertEqual(cc.get_cache_resource_expiration('server'), 5.0)
+        self.assertEqual(cc.get_cache_resource_expiration('image'), 7.0)