diff --git a/tempest/cli/__init__.py b/tempest/cli/__init__.py
index 6aa98c4..d10dd19 100644
--- a/tempest/cli/__init__.py
+++ b/tempest/cli/__init__.py
@@ -89,14 +89,15 @@
         return self.cmd_with_auth(
             'neutron', action, flags, params, admin, fail_ok)
 
-    def sahara(self, action, flags='', params='', admin=True, fail_ok=False):
+    def sahara(self, action, flags='', params='', admin=True,
+               fail_ok=False, merge_stderr=True):
         """Executes sahara command for the given action."""
         flags += ' --endpoint-type %s' % CONF.data_processing.endpoint_type
         return self.cmd_with_auth(
-            'sahara', action, flags, params, admin, fail_ok)
+            'sahara', action, flags, params, admin, fail_ok, merge_stderr)
 
     def cmd_with_auth(self, cmd, action, flags='', params='',
-                      admin=True, fail_ok=False):
+                      admin=True, fail_ok=False, merge_stderr=False):
         """Executes given command with auth attributes appended."""
         # TODO(jogo) make admin=False work
         creds = ('--os-username %s --os-tenant-name %s --os-password %s '
@@ -106,7 +107,7 @@
                   CONF.identity.admin_password,
                   CONF.identity.uri))
         flags = creds + ' ' + flags
-        return self.cmd(cmd, action, flags, params, fail_ok)
+        return self.cmd(cmd, action, flags, params, fail_ok, merge_stderr)
 
     def cmd(self, cmd, action, flags='', params='', fail_ok=False,
             merge_stderr=False):
diff --git a/tempest/cli/simple_read_only/test_sahara.py b/tempest/cli/simple_read_only/test_sahara.py
index 36cc324..f00dcae 100644
--- a/tempest/cli/simple_read_only/test_sahara.py
+++ b/tempest/cli/simple_read_only/test_sahara.py
@@ -12,8 +12,8 @@
 # implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 import logging
+import re
 import subprocess
 
 from tempest import cli
@@ -138,3 +138,30 @@
             'cluster_id',
             'status'
         ])
+
+    def test_sahara_bash_completion(self):
+        self.sahara('bash-completion')
+
+    # Optional arguments
+    def test_sahara_help(self):
+        help_text = self.sahara('help')
+        lines = help_text.split('\n')
+        self.assertFirstLineStartsWith(lines, 'usage: sahara')
+
+        commands = []
+        cmds_start = lines.index('Positional arguments:')
+        cmds_end = lines.index('Optional arguments:')
+        command_pattern = re.compile('^ {4}([a-z0-9\-\_]+)')
+        for line in lines[cmds_start:cmds_end]:
+            match = command_pattern.match(line)
+            if match:
+                commands.append(match.group(1))
+        commands = set(commands)
+        wanted_commands = set(('cluster-create', 'data-source-create',
+                               'image-unregister', 'job-binary-create',
+                               'plugin-list', 'job-binary-create', 'help'))
+        self.assertFalse(wanted_commands - commands)
+
+    def test_sahara_version(self):
+        version = self.sahara('', flags='--version')
+        self.assertTrue(re.search('[0-9.]+', version))