Swimbot Error

Traceback (most recent call last):
  File "C:\Users\swimm\AppData\Local\Programs\Python\Python37\lib\site-packages\discord\ext\commands\core.py", line 85, in wrapped
    ret = await coro(*args, **kwargs)
  File "c:\Users\swimm\OneDrive\Desktop\Swimbot\SwimBot.py", line 47, in unload
    bot.unload_extension(extension_name)
  File "C:\Users\swimm\AppData\Local\Programs\Python\Python37\lib\site-packages\discord\ext\commands\bot.py", line 692, in unload_extension
    raise errors.ExtensionNotLoaded(name)
discord.ext.commands.errors.ExtensionNotLoaded: Extension 'test' has not been loaded.