diff --git a/sahara/tests/unit/plugins/ambari/test_common.py b/sahara/tests/unit/plugins/ambari/test_common.py
new file mode 100644
index 00000000..b2f36b9f
--- /dev/null
+++ b/sahara/tests/unit/plugins/ambari/test_common.py
@@ -0,0 +1,69 @@
+# Copyright (c) 2017 EasyStack Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import mock
+
+from sahara.plugins.ambari import common
+from sahara.tests.unit import base
+
+
+class AmbariCommonTestCase(base.SaharaTestCase):
+    def setUp(self):
+        super(AmbariCommonTestCase, self).setUp()
+        self.master_ng = mock.Mock()
+        self.master_ng.node_processes = ['Ambari', 'HiveServer']
+
+        self.worker_ng = mock.Mock()
+        self.worker_ng.node_processes = ['DataNode', 'Oozie']
+
+        self.cluster = mock.Mock()
+        self.cluster.node_groups = [self.master_ng, self.worker_ng]
+
+    def test_get_ambari_proc_list(self):
+        procs = common.get_ambari_proc_list(self.master_ng)
+        expected = ['METRICS_COLLECTOR', 'HIVE_SERVER',
+                    'MYSQL_SERVER', 'WEBHCAT_SERVER']
+        self.assertEqual(procs, expected)
+
+        procs = common.get_ambari_proc_list(self.worker_ng)
+        expected = ['DATANODE', 'OOZIE_SERVER', 'PIG']
+        self.assertEqual(procs, expected)
+
+    @mock.patch('sahara.plugins.kerberos.is_kerberos_security_enabled')
+    def test_get_clients(self, kerberos):
+        kerberos.return_value = False
+        clients = common.get_clients(self.cluster)
+        expected = ['OOZIE_CLIENT', 'HIVE_CLIENT', 'HDFS_CLIENT',
+                    'TEZ_CLIENT', 'METRICS_MONITOR']
+        for e in expected:
+            self.assertIn(e, clients)
+
+        kerberos.return_value = True
+        clients = common.get_clients(self.cluster)
+        expected = ['OOZIE_CLIENT', 'HIVE_CLIENT', 'HDFS_CLIENT',
+                    'TEZ_CLIENT', 'METRICS_MONITOR', 'KERBEROS_CLIENT']
+        for e in expected:
+            self.assertIn(e, clients)
+
+    def test_instances_have_process(self):
+        instance1 = mock.Mock()
+        instance2 = mock.Mock()
+        instance1.node_group = self.master_ng
+        instance2.node_group = self.worker_ng
+        self.assertTrue(common.instances_have_process([instance1], "Ambari"))
+        self.assertTrue(common.instances_have_process([instance1, instance2],
+                                                      "DataNode"))
+        self.assertFalse(common.instances_have_process([instance1, instance2],
+                                                       "DRPC Server"))