diff --git a/designate/objects/zone.py b/designate/objects/zone.py
index 3dc69de0..bf825c32 100644
--- a/designate/objects/zone.py
+++ b/designate/objects/zone.py
@@ -189,6 +189,9 @@ class Zone(base.DictObjectMixin, base.SoftDeleteObjectMixin,
                 "Provided object does not match "
                 "schema", errors=errors, object=self)
 
+    def __hash__(self):
+        return hash(self.id)
+
     def validate(self):
         errors = ValidationErrorList()
 
diff --git a/tests-py3.txt b/tests-py3.txt
index 8537bc46..224a32da 100644
--- a/tests-py3.txt
+++ b/tests-py3.txt
@@ -1,5 +1,4 @@
 # Blacklist of tests failing on Python 3
-designate.tests.test_pool_manager.test_service
 designate.tests.unit.test_central.test_basic
 designate.tests.unit.test_pool
 designate.tests.unit.test_producer.test_tasks