diff --git a/tripleoclient/utils.py b/tripleoclient/utils.py
index 99425d9b8..e269b5273 100644
--- a/tripleoclient/utils.py
+++ b/tripleoclient/utils.py
@@ -56,7 +56,8 @@ def run_ansible_playbook(logger,
                          ansible_config=None,
                          retries=True,
                          connection='smart',
-                         output_callback='json'):
+                         output_callback='json',
+                         python_interpreter=None):
     """Simple wrapper for ansible-playbook
 
     :param logger: logger instance
@@ -83,6 +84,10 @@ def run_ansible_playbook(logger,
 
     :param output_callback: Callback for output format. Defaults to "json"
     :type output_callback: String
+
+    :param python_interpreter: Absolute path for the Python interpreter
+    on the host where Ansible is run.
+    :type python_interpreter: String
     """
     env = os.environ.copy()
     cleanup = False
@@ -105,6 +110,9 @@ def run_ansible_playbook(logger,
     elif os.path.exists(os.path.join(workdir, ansible_config)):
         env['ANSIBLE_CONFIG'] = os.path.join(workdir, ansible_config)
 
+    if python_interpreter is not None:
+        env['ANSIBLE_PYTHON_INTERPRETER'] = python_interpreter
+
     play = os.path.join(workdir, playbook)
 
     if os.path.exists(play):
diff --git a/tripleoclient/v1/undercloud_preflight.py b/tripleoclient/v1/undercloud_preflight.py
index 2bf5bd332..f6a6f12b7 100644
--- a/tripleoclient/v1/undercloud_preflight.py
+++ b/tripleoclient/v1/undercloud_preflight.py
@@ -112,13 +112,15 @@ def _check_diskspace(upgrade=False):
     else:
         playbook = 'undercloud-disk-space.yaml'
 
+    python_interpreter = "/usr/bin/python{}".format(sys.version_info[0])
     utils.run_ansible_playbook(logger=LOG,
                                workdir=constants.ANSIBLE_VALIDATION_DIR,
                                playbook=playbook,
                                inventory='undercloud,',
                                retries=False,
                                connection='local',
-                               output_callback='validation_output')
+                               output_callback='validation_output',
+                               python_interpreter=python_interpreter)
 
 
 def _check_hostname():