diff --git a/ament_clang_tidy/ament_clang_tidy/main.py b/ament_clang_tidy/ament_clang_tidy/main.py
index 0158d6c2..5faa8142 100755
--- a/ament_clang_tidy/ament_clang_tidy/main.py
+++ b/ament_clang_tidy/ament_clang_tidy/main.py
@@ -175,7 +175,7 @@ def start_subprocess(full_cmd):
                       file=sys.stderr)
                 # Attempt to recover output, if any was found (eg - if
                 # WarningsAsErrors was specified in the config file).
-                output = e.output.decode("utf-8")
+                output = e.output.decode('utf-8')
             return output
 
         files = []
@@ -206,7 +206,8 @@ def start_subprocess(full_cmd):
     for compilation_db in compilation_dbs:
         package_dir = os.path.dirname(compilation_db)
         package_name = os.path.basename(package_dir)
-        print(f"found compilation database for package '{package_name}' at '{compilation_db}'")        (source_files, output) = invoke_clang_tidy(compilation_db)
+        print(f"found compilation database for package '{package_name}' at '{compilation_db}'")
+        (source_files, output) = invoke_clang_tidy(compilation_db)
         files += source_files
         outputs.append(output)
     pool.close()