diff --git a/clearml/automation/cloud_driver.py b/clearml/automation/cloud_driver.py
index 0e069864..489518da 100644
--- a/clearml/automation/cloud_driver.py
+++ b/clearml/automation/cloud_driver.py
@@ -7,10 +7,10 @@ import attr
 from ..backend_api import Session
 from ..backend_api.session.defs import ENV_AUTH_TOKEN
 
-env_git_user = 'CLEARML_AUTOSCALER_GIT_USER'
-env_git_pass = 'CLEARML_AUTOSCALER_GIT_PASSWORD'
+env_git_user = "CLEARML_AUTOSCALER_GIT_USER"
+env_git_pass = "CLEARML_AUTOSCALER_GIT_PASSWORD"
 
-bash_script_template = '''\
+bash_script_template = """\
 #!/bin/bash
 
 set -x
@@ -49,13 +49,13 @@ then
 fi
 
 shutdown
-'''
+"""
 
-clearml_conf_template = '''\
+clearml_conf_template = """\
 agent.git_user="{git_user}"
 agent.git_pass="{git_pass}"
 {extra_clearml_conf}
-'''
+"""
 
 
 @attr.s
@@ -76,7 +76,7 @@ class CloudDriver(ABC):
     # Other
     extra_vm_bash_script = attr.ib()
     docker_image = attr.ib()
-    tags = attr.ib(default='')
+    tags = attr.ib(default="")
     session = attr.ib(default=None)
 
     def __attrs_post_init__(self):
@@ -125,15 +125,13 @@ class CloudDriver(ABC):
         return bash_script_template.format(
             queue=queue_name,
             worker_prefix=worker_prefix,
-
-            auth_token=self.auth_token or '',
-            access_key=self.access_key or '',
+            auth_token=self.auth_token or "",
+            access_key=self.access_key or "",
             api_server=self.api_server,
             clearml_conf=self.clearml_conf(),
             files_server=self.files_server,
-            secret_key=self.secret_key or '',
+            secret_key=self.secret_key or "",
             web_server=self.web_server,
-
             bash_script=("export NVIDIA_VISIBLE_DEVICES=none; " if cpu_only else "") + self.extra_vm_bash_script,
             driver_extra=self.driver_bash_extra(task_id),
             docker="--docker '{}'".format(self.docker_image) if self.docker_image else "",
@@ -142,8 +140,8 @@ class CloudDriver(ABC):
 
     def clearml_conf(self):
         # TODO: This need to be documented somewhere
-        git_user = environ.get(env_git_user) or self.git_user or ''
-        git_pass = environ.get(env_git_pass) or self.git_pass or ''
+        git_user = environ.get(env_git_user) or self.git_user or ""
+        git_pass = environ.get(env_git_pass) or self.git_pass or ""
 
         return clearml_conf_template.format(
             git_user=git_user,
@@ -153,27 +151,27 @@ class CloudDriver(ABC):
 
     def driver_bash_extra(self, task_id):
         if not task_id:
-            return ''
-        return 'python -m clearml_agent --config-file ~/clearml.conf execute --id {}'.format(task_id)
+            return ""
+        return "python -m clearml_agent --config-file ~/clearml.conf execute --id {}".format(task_id)
 
     @classmethod
     def from_config(cls, config):
         session = Session()
-        hyper_params, configurations = config['hyper_params'], config['configurations']
+        hyper_params, configurations = config["hyper_params"], config["configurations"]
         opts = {
-            'git_user': hyper_params['git_user'],
-            'git_pass': hyper_params['git_pass'],
-            'extra_clearml_conf': configurations['extra_clearml_conf'],
-            'api_server': session.get_api_server_host(),
-            'web_server': session.get_app_server_host(),
-            'files_server': session.get_files_server_host(),
-            'access_key': session.access_key,
-            'secret_key': session.secret_key,
-            'auth_token': ENV_AUTH_TOKEN.get(),
-            'extra_vm_bash_script': configurations['extra_vm_bash_script'],
-            'docker_image': hyper_params['default_docker_image'],
-            'tags': hyper_params.get('tags', ''),
-            'session': session,
+            "git_user": hyper_params["git_user"],
+            "git_pass": hyper_params["git_pass"],
+            "extra_clearml_conf": configurations["extra_clearml_conf"],
+            "api_server": session.get_api_server_host(),
+            "web_server": session.get_app_server_host(),
+            "files_server": session.get_files_server_host(),
+            "access_key": session.access_key,
+            "secret_key": session.secret_key,
+            "auth_token": ENV_AUTH_TOKEN.get(),
+            "extra_vm_bash_script": configurations["extra_vm_bash_script"],
+            "docker_image": hyper_params["default_docker_image"],
+            "tags": hyper_params.get("tags", ""),
+            "session": session,
         }
         return cls(**opts)
 
@@ -184,7 +182,7 @@ class CloudDriver(ABC):
     def logger(self):
         if self.scaler:
             return self.scaler.logger
-        return logging.getLogger('AWSDriver')
+        return logging.getLogger("AWSDriver")
 
 
 def parse_tags(s):
@@ -197,10 +195,10 @@ def parse_tags(s):
         return []
 
     tags = []
-    for kv in s.split(','):
-        if '=' not in kv:
+    for kv in s.split(","):
+        if "=" not in kv:
             raise ValueError(kv)
-        key, value = [v.strip() for v in kv.split('=', 1)]
+        key, value = [v.strip() for v in kv.split("=", 1)]
         if not key or not value:
             raise ValueError(kv)
         tags.append((key, value))