diff --git a/aider_gitea/gitea_client.py b/aider_gitea/gitea_client.py
index 788f0c9..751b2ea 100644
--- a/aider_gitea/gitea_client.py
+++ b/aider_gitea/gitea_client.py
@@ -169,13 +169,13 @@ class GiteaClient:
         # If a pull request for this head/base already exists, return it instead of crashing
         if response.status_code == 422:
             logger.warning(
-                "Pull request already exists for head %s and base %s", head, base
+                'Pull request already exists for head %s and base %s', head, base,
             )
             prs = self.get_pull_requests(owner, repo)
             for pr in prs:
                 if (
-                    pr.get("head", {}).get("ref") == head
-                    and pr.get("base", {}).get("ref") == base
+                    pr.get('head', {}).get('ref') == head
+                    and pr.get('base', {}).get('ref') == base
                 ):
                     return pr
             # fallback to raise if we can’t find it
@@ -201,10 +201,10 @@ class GiteaClient:
         self,
         owner: str,
         repo: str,
-        state: str = "open",
+        state: str = 'open',
     ) -> list[dict]:
         """Fetch pull requests for a repository."""
-        url = f"{self.gitea_url}/repos/{owner}/{repo}/pulls?state={state}"
+        url = f'{self.gitea_url}/repos/{owner}/{repo}/pulls?state={state}'
         response = self.session.get(url)
         response.raise_for_status()
         return response.json()