diff --git a/fs_task_queue/plugins/ssh.py b/fs_task_queue/plugins/ssh.py
index a5c3258..d2ab345 100644
--- a/fs_task_queue/plugins/ssh.py
+++ b/fs_task_queue/plugins/ssh.py
@@ -73,8 +73,8 @@ def _create_client(self, directory):
             "port": int(p.port or 22),
             "username": p.username or os.getlogin(),
             "password": p.password,
-            "key_file": os.environ.get('PARAMIKO_SSH_KEYFILE'),
-            "passphrase": os.environ.get('PARAMIKO_SSH_PASSPHRASE'),
+            "key_file": os.environ.get("PARAMIKO_SSH_KEYFILE"),
+            "passphrase": os.environ.get("PARAMIKO_SSH_PASSPHRASE"),
             "path": p.path,
         }