diff --git a/vsphere/datadog_checks/vsphere/vsphere.py b/vsphere/datadog_checks/vsphere/vsphere.py
index f79df2d043ac93..fa879c4f84b83b 100644
--- a/vsphere/datadog_checks/vsphere/vsphere.py
+++ b/vsphere/datadog_checks/vsphere/vsphere.py
@@ -629,11 +629,11 @@ def _process_mor_objects_queue(self, instance):
             return
 
         for resource_type in RESOURCE_TYPE_METRICS:
-            query_specs = []
             # Batch size can prevent querying large payloads at once if the environment is too large
             # If batch size is set to 0, process everything at once
             batch_size = self.batch_morlist_size or self.mor_objects_queue.size(i_key, resource_type)
             while self.mor_objects_queue.size(i_key, resource_type):
+                query_specs = []
                 for _ in xrange(batch_size):
                     mor = self.mor_objects_queue.pop(i_key, resource_type)
                     if mor is None:
@@ -832,8 +832,8 @@ def collect_metrics(self, instance):
         # Request metrics for several objects at once. We can limit the number of objects with batch_size
         # If batch_size is 0, process everything at once
         batch_size = self.batch_morlist_size or n_mors
-        query_specs = []
         for batch in self.mor_cache.mors_batch(i_key, batch_size):
+            query_specs = []
             for mor_name, mor in batch.iteritems():
                 if mor['mor_type'] == 'vm':
                     vm_count += 1
diff --git a/vsphere/tests/test_vsphere.py b/vsphere/tests/test_vsphere.py
index 1793e65b2b3d5c..d38d487363adea 100644
--- a/vsphere/tests/test_vsphere.py
+++ b/vsphere/tests/test_vsphere.py
@@ -233,6 +233,7 @@ def test__cache_morlist_raw_async(vsphere, instance):
 
 def test__process_mor_objects_queue(vsphere, instance):
     vsphere.log = MagicMock()
+    vsphere._process_mor_objects_queue_async = MagicMock()
     vsphere._process_mor_objects_queue(instance)
     # Queue hasn't been initialized
     vsphere.log.debug.assert_called_once_with(
@@ -248,6 +249,10 @@ def test__process_mor_objects_queue(vsphere, instance):
         vsphere._process_mor_objects_queue(instance)
         # Object queue should be empty after processing
         assert sum(vsphere.mor_objects_queue.size(i_key, resource_type) for resource_type in RESOURCE_TYPE_METRICS) == 0
+        assert vsphere._process_mor_objects_queue_async.call_count == 2  # Once for each datacenter
+        for call_args in vsphere._process_mor_objects_queue_async.call_args_list:
+            # query_specs parameter should be a list of size 1 since the batch size is 1
+            assert len(call_args[0][1]) == 1
 
 
 def test_collect_realtime_only(vsphere, instance):
@@ -343,6 +348,20 @@ def test_format_metric_name(vsphere):
         assert vsphere.format_metric_name(counter) == "group.name.{}".format(short_rollup)
 
 
+def test_collect_metrics(vsphere, instance):
+    with mock.patch('datadog_checks.vsphere.vsphere.vmodl'):
+        vsphere.batch_morlist_size = 1
+        vsphere._collect_metrics_async = MagicMock()
+        vsphere._cache_metrics_metadata(instance)
+        vsphere._cache_morlist_raw(instance)
+        vsphere._process_mor_objects_queue(instance)
+        vsphere.collect_metrics(instance)
+        assert vsphere._collect_metrics_async.call_count == 6  # One for each VM/host, datacenters are not collected
+        for call_args in vsphere._collect_metrics_async.call_args_list:
+            # query_specs parameter should be a list of size 1 since the batch size is 1
+            assert len(call_args[0][1]) == 1
+
+
 def test__collect_metrics_async_compatibility(vsphere, instance):
     server_instance = vsphere._get_server_instance(instance)
     server_instance.content.perfManager.QueryPerf.return_value = [MagicMock(value=[MagicMock()])]