diff --git a/neptune/experiments.py b/neptune/experiments.py
index b265bf063..ebe05245f 100644
--- a/neptune/experiments.py
+++ b/neptune/experiments.py
@@ -168,11 +168,18 @@ def get_system_properties(self):
     def get_tags(self):
         return self._client.get_experiment(self._internal_id).tags
 
-    def append_tag(self, tag):
+    def append_tag(self, tag, *tags):
+        if isinstance(tag, list):
+            tags_list = tag
+        else:
+            tags_list = [tag] + list(tags)
         self._client.update_tags(experiment=self,
-                                 tags_to_add=[tag],
+                                 tags_to_add=tags_list,
                                  tags_to_delete=[])
 
+    def append_tags(self, tag, *tags):
+        self.append_tag(tag, *tags)
+
     def remove_tag(self, tag):
         self._client.update_tags(experiment=self,
                                  tags_to_add=[],
diff --git a/tests/neptune/test_experiment.py b/tests/neptune/test_experiment.py
index 7557a95d6..b1e37cf33 100644
--- a/tests/neptune/test_experiment.py
+++ b/tests/neptune/test_experiment.py
@@ -21,7 +21,7 @@
 
 import mock
 import pandas as pd
-from mock import MagicMock
+from mock import call, MagicMock
 from munch import Munch
 from pandas.util.testing import assert_frame_equal
 
@@ -101,6 +101,37 @@ def test_send_image(self, ChannelsValuesSender, content):
         # then
         channels_values_sender.send.assert_called_with('errors', ChannelType.IMAGE.value, channel_value)
 
+    def test_append_tags(self):
+        # given
+        client = mock.MagicMock()
+        experiment = Experiment(client, an_experiment_id(), a_uuid_string(), a_project_qualified_name())
+
+        #and
+        def build_call(tags_list):
+            return call(
+                experiment=experiment,
+                tags_to_add=tags_list,
+                tags_to_delete=[]
+            )
+
+        # when
+        experiment.append_tag('tag')
+        experiment.append_tag(['tag1', 'tag2', 'tag3'])
+        experiment.append_tag('tag1', 'tag2', 'tag3')
+        experiment.append_tags('tag')
+        experiment.append_tags(['tag1', 'tag2', 'tag3'])
+        experiment.append_tags('tag1', 'tag2', 'tag3')
+
+        # then
+        client.update_tags.assert_has_calls([
+            build_call(['tag']),
+            build_call(['tag1', 'tag2', 'tag3']),
+            build_call(['tag1', 'tag2', 'tag3']),
+            build_call(['tag']),
+            build_call(['tag1', 'tag2', 'tag3']),
+            build_call(['tag1', 'tag2', 'tag3'])
+        ])
+
     def test_get_numeric_channels_values(self):
         # when
         client = MagicMock()