diff --git a/cinder/volume/drivers/vmware/datastore.py b/cinder/volume/drivers/vmware/datastore.py
index 61d15d28e69..3f5f126fb5b 100644
--- a/cinder/volume/drivers/vmware/datastore.py
+++ b/cinder/volume/drivers/vmware/datastore.py
@@ -113,12 +113,10 @@ class DatastoreSelector(object):
         filtered_summaries = [self._vops.get_summary(ds) for ds in
                               filtered_datastores]
 
-        def _filter(summary):
-            return (summary.freeSpace > size_bytes and
+        return [summary for summary in filtered_summaries
+                if (summary.freeSpace > size_bytes and
                     (hard_affinity_ds_types is None or
-                     summary.type.lower() in hard_affinity_ds_types))
-
-        return filter(_filter, filtered_summaries)
+                     summary.type.lower() in hard_affinity_ds_types))]
 
     def _get_all_hosts(self):
         """Get all ESX hosts managed by vCenter."""
diff --git a/tests-py3.txt b/tests-py3.txt
index b4de7284101..4160aac3bd9 100644
--- a/tests-py3.txt
+++ b/tests-py3.txt
@@ -107,6 +107,7 @@ cinder.tests.unit.test_v6000_fcp
 cinder.tests.unit.test_v6000_iscsi
 cinder.tests.unit.test_v7000_common
 cinder.tests.unit.test_v7000_fcp
+cinder.tests.unit.test_vmware_datastore
 cinder.tests.unit.test_vmware_vmdk
 cinder.tests.unit.test_vmware_volumeops
 cinder.tests.unit.test_volume