diff --git a/oslo_versionedobjects/fields.py b/oslo_versionedobjects/fields.py
index 4b175741..0ee27f9d 100644
--- a/oslo_versionedobjects/fields.py
+++ b/oslo_versionedobjects/fields.py
@@ -347,7 +347,10 @@ class UUID(StringPattern):
     def coerce(obj, attr, value):
         # FIXME(danms): We should actually verify the UUIDness here
         with warnings.catch_warnings():
-            warnings.simplefilter("once")
+            # Change the warning action only if no other filter exists
+            # for this warning to allow the client to define other action
+            # like 'error' for this warning.
+            warnings.filterwarnings(action="once", append=True)
             try:
                 uuid.UUID(str(value))
             except Exception:
diff --git a/oslo_versionedobjects/tests/test_fields.py b/oslo_versionedobjects/tests/test_fields.py
index ad36c2fe..77c7dd48 100644
--- a/oslo_versionedobjects/tests/test_fields.py
+++ b/oslo_versionedobjects/tests/test_fields.py
@@ -13,6 +13,7 @@
 #    under the License.
 
 import datetime
+import warnings
 
 import iso8601
 import mock
@@ -296,6 +297,11 @@ class TestUUID(TestField):
         self.test_from_primitive()
         self.test_to_primitive()
 
+    def test_validation_warning_can_be_escalated_to_exception(self):
+        warnings.filterwarnings(action='error')
+        self.assertRaises(FutureWarning, self.field.coerce, 'obj', 'attr',
+                          'not a uuid')
+
     def test_get_schema(self):
         field = fields.UUIDField()
         schema = field.get_schema()