diff --git a/aider_gitea/__init__.py b/aider_gitea/__init__.py
index 76659ce..20f0d6a 100644
--- a/aider_gitea/__init__.py
+++ b/aider_gitea/__init__.py
@@ -138,6 +138,7 @@ For code tasks:
 
 MODEL = None
 
+
 def create_aider_command(issue: str) -> list[str]:
     l = [
         'aider',
@@ -195,7 +196,7 @@ def get_commit_messages(cwd: Path, base_branch: str, current_branch: str) -> str
         return result.stdout.strip()
     except subprocess.CalledProcessError:
         logger.exception(f'Failed to get commit messages on branch {current_branch}')
-        return ""
+        return ''
 
 
 def push_changes(
@@ -209,16 +210,16 @@ def push_changes(
     if not has_commits_on_branch(cwd, base_branch, branch_name):
         logger.info('No commits made on branch %s, skipping push', branch_name)
         return False
-    
+
     # Get commit messages for PR description
     commit_messages = get_commit_messages(cwd, base_branch, branch_name)
-    description = f"This pull request resolves #{issue_number}\n\n"
-    
+    description = f'This pull request resolves #{issue_number}\n\n'
+
     if commit_messages:
-        description += "## Commit Messages\n\n"
+        description += '## Commit Messages\n\n'
         for message in commit_messages.split('\n'):
-            description += f"- {message}\n"
-    
+            description += f'- {message}\n'
+
     cmd = [
         'git',
         'push',
diff --git a/test/test_seen_issues_db.py b/test/test_seen_issues_db.py
index 4b4dcc0..71a0d2e 100644
--- a/test/test_seen_issues_db.py
+++ b/test/test_seen_issues_db.py
@@ -1,4 +1,3 @@
-
 from aider_gitea.seen_issues_db import SeenIssuesDB