diff --git a/cinder/api/validation/parameter_types.py b/cinder/api/validation/parameter_types.py
index 80f1b07df3d..71d277cb780 100644
--- a/cinder/api/validation/parameter_types.py
+++ b/cinder/api/validation/parameter_types.py
@@ -147,7 +147,7 @@ uuid = {
 extra_specs = {
     'type': 'object',
     'patternProperties': {
-        '^[a-zA-Z0-9-_:. ]{1,255}$': {
+        '^[a-zA-Z0-9-_:. /]{1,255}$': {
             'type': 'string', 'maxLength': 255
         }
     },
@@ -173,7 +173,7 @@ group_snapshot_status = {
 
 extra_specs_with_null = copy.deepcopy(extra_specs)
 extra_specs_with_null['patternProperties'][
-    '^[a-zA-Z0-9-_:. ]{1,255}$']['type'] = ['string', 'null']
+    '^[a-zA-Z0-9-_:. /]{1,255}$']['type'] = ['string', 'null']
 
 
 name_allow_zero_min_length = {
diff --git a/cinder/tests/functional/test_volumes.py b/cinder/tests/functional/test_volumes.py
index e0a82b54189..cb243b318fb 100644
--- a/cinder/tests/functional/test_volumes.py
+++ b/cinder/tests/functional/test_volumes.py
@@ -82,7 +82,8 @@ class VolumesTest(functional_helpers._FunctionalTestBase):
 
         # Create volume
         metadata = {'key1': 'value1',
-                    'key2': 'value2'}
+                    'key2': 'value2',
+                    'volume/created/by': 'cinder'}
         created_volume = self.api.post_volume(
             {'volume': {'size': 1,
                         'metadata': metadata}})