diff --git a/python/src/etos_api/library/docker.py b/python/src/etos_api/library/docker.py
index 7485b53..8e1ca04 100644
--- a/python/src/etos_api/library/docker.py
+++ b/python/src/etos_api/library/docker.py
@@ -92,7 +92,9 @@ async def authorize(
             else:
                 query[key] = value.strip('"')
 
-        if not isinstance(url, str) or not (url.startswith("http://") or url.startswith("https://")):
+        if not isinstance(url, str) or not (
+            url.startswith("http://") or url.startswith("https://")
+        ):
             raise ValueError(f"No realm URL found in www-authenticate header: {www_auth_header}")
 
         async with session.get(url, params=query) as response:
diff --git a/python/src/etos_api/library/validator.py b/python/src/etos_api/library/validator.py
index b585490..0a1744a 100644
--- a/python/src/etos_api/library/validator.py
+++ b/python/src/etos_api/library/validator.py
@@ -199,9 +199,7 @@ async def validate(self, test_suite_url):
             for test_runner in test_runners:
                 for attempt in range(5):
                     if attempt > 0:
-                        span.add_event(
-                            f"Test runner validation unsuccessful, retry #{attempt}"
-                        )
+                        span.add_event(f"Test runner validation unsuccessful, retry #{attempt}")
                         self.logger.warning(
                             "Test runner %s validation unsuccessful, retry #%d",
                             test_runner,