diff --git a/traceback_with_variables/module_alias.py b/traceback_with_variables/module_alias.py
index cecb825..cbbd478 100644
--- a/traceback_with_variables/module_alias.py
+++ b/traceback_with_variables/module_alias.py
@@ -40,12 +40,12 @@ def create_alias(alias: str, module_name: str) -> None:
 
     try:
         os.symlink(str(module_path), str(module_path.parent / alias))
-    except FileExistsError as e:
+    except FileExistsError:
         raise ValueError('the needed file system location already occupied')
 
 
 def rm_alias(alias: str) -> None:
     module_path = module_name_to_path(alias)
     if not module_path.is_symlink():
-        raise ValueError(f'the module is not an alias')
+        raise ValueError('the module is not an alias')
     os.remove(str(module_path))