diff --git a/aider_gitea/__init__.py b/aider_gitea/__init__.py
index 20f0d6a..cf051b4 100644
--- a/aider_gitea/__init__.py
+++ b/aider_gitea/__init__.py
@@ -257,7 +257,7 @@ def has_commits_on_branch(cwd: Path, base_branch: str, current_branch: str) -> b
         )
         return bool(result.stdout.strip())
     except subprocess.CalledProcessError:
-        logger.exception(f'Failed to check commits on branch {current_branch}')
+        logger.exception('Failed to check commits on branch %s', current_branch)
         return False
 
 
@@ -296,8 +296,9 @@ def solve_issue_in_repository(
     run_cmd(['git', 'checkout', '-b', branch_name], tmpdirname)
 
     # Run aider
+    issue_content = f'# {issue_title}\n{issue_description}'
     succeeded = run_cmd(
-        create_aider_command(f'# {issue_title}\n{issue_description}'),
+        create_aider_command(issue_content),
         tmpdirname,
         check=False,
     )
@@ -344,7 +345,7 @@ def handle_issues(args, client, seen_issues_db):
         title = issue.get('title', f'Issue {issue_number}')
         issue_text = f'{title}\n{issue_description}'
         if seen_issues_db.has_seen(issue_text):
-            logger.info(f'Skipping already processed issue #{issue_number}: {title}')
+            logger.info('Skipping already processed issue #%s: %s', issue_number, title)
             continue
 
         branch_name = generate_branch_name(issue_number, title)
diff --git a/aider_gitea/gitea_client.py b/aider_gitea/gitea_client.py
index 362bc71..df9cc05 100644
--- a/aider_gitea/gitea_client.py
+++ b/aider_gitea/gitea_client.py
@@ -73,7 +73,7 @@ class GiteaClient:
         json_data = {'ref': f'refs/heads/{new_branch}', 'sha': sha}
         response = self.session.post(url, json=json_data)
         if response.status_code == 422:
-            logger.warning(f'Branch {new_branch} already exists.')
+            logger.warning('Branch %s already exists.', new_branch)
             return False
         response.raise_for_status()
         return True