diff --git a/cmdeploy/src/cmdeploy/__init__.py b/cmdeploy/src/cmdeploy/__init__.py
index 265eccd..809730a 100644
--- a/cmdeploy/src/cmdeploy/__init__.py
+++ b/cmdeploy/src/cmdeploy/__init__.py
@@ -1,6 +1,7 @@
 """
 Chat Mail pyinfra deploy.
 """
+
 import sys
 import importlib.resources
 import subprocess
@@ -303,9 +304,7 @@ def _configure_postfix(config: Config, debug: bool = False) -> bool:
 
     # Login map that 1:1 maps email address to login.
     login_map = files.put(
-        src=importlib.resources.files(__package__).joinpath(
-            "postfix/login_map"
-        ),
+        src=importlib.resources.files(__package__).joinpath("postfix/login_map"),
         dest="/etc/postfix/login_map",
         user="root",
         group="root",
diff --git a/cmdeploy/src/cmdeploy/cmdeploy.py b/cmdeploy/src/cmdeploy/cmdeploy.py
index 0fdb481..bde9b75 100644
--- a/cmdeploy/src/cmdeploy/cmdeploy.py
+++ b/cmdeploy/src/cmdeploy/cmdeploy.py
@@ -2,6 +2,7 @@
 Provides the `cmdeploy` entry point function,
 along with command line option and subcommand parsing.
 """
+
 import argparse
 import shutil
 import subprocess
diff --git a/cmdeploy/src/cmdeploy/tests/online/test_2_deltachat.py b/cmdeploy/src/cmdeploy/tests/online/test_2_deltachat.py
index 2a03b65..e8a7244 100644
--- a/cmdeploy/src/cmdeploy/tests/online/test_2_deltachat.py
+++ b/cmdeploy/src/cmdeploy/tests/online/test_2_deltachat.py
@@ -142,7 +142,7 @@ def test_echobot(cmfactory, chatmail_config, lp):
     ac = cmfactory.get_online_accounts(1)[0]
 
     lp.sec(f"Send message to echo@{chatmail_config.mail_domain}")
-    chat = ac.create_chat(f'echo@{chatmail_config.mail_domain}')
+    chat = ac.create_chat(f"echo@{chatmail_config.mail_domain}")
     text = "hi, I hope you text me back"
     chat.send_text(text)
     lp.sec("Wait for reply from echobot")