Monday, December 5, 2011

MSTEST - UTA004: Illegal use of attribute on testmethod

Have you seem this error UTA004: Illegal use of attribute on testmethod. The TestMethodAttribute can be defined only inside a class marked with the TestClass attribute. while trying to run a mstest unit test.
The common scenario when this occurs is if there is a method with [TestMethod] attribute but the class in which it is defined does not have [TestClass] attribute.
However, even if you add the [TestClass] attribute and the error does not go away, the reason is that the class is not public.

Hence, make sure that the class is public and it has [TestClass] attribute.
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22 comments:

  1. Fathom SavvyFebruary 18, 2012 at 6:40 PM

    Awesome! Thanks so much. I guess it needs to be public so that the test runner executable can see it.

    ReplyDelete
  2. Fathom SavvyFebruary 18, 2012 at 6:41 PM

    Awesome! Thanks so much. I guess it needs to be public so that the test runner executable can see it.

    ReplyDelete
  3. AnonymousAugust 20, 2012 at 4:59 AM

    Thanks so much

    ReplyDelete
  4. AnonymousJanuary 17, 2013 at 7:00 AM

    Thanks that fixed the problem for me.

    ReplyDelete
  5. Steppeish May 1, 2013 at 8:00 AM

    Thanks! Saved me a lot of frustration.

    ReplyDelete
  6. KnowcowJune 4, 2013 at 1:07 PM

    Thanks. helped a lot.

    ReplyDelete
  7. BEPenfriendsJune 30, 2013 at 1:46 PM

    many thanks

    ReplyDelete
  8. piyush medirattaJuly 31, 2013 at 2:31 AM

    Thanks a lot. Saved my day.

    ReplyDelete
  9. AnonymousSeptember 18, 2013 at 12:22 AM

    Thanks.. This information helped me.

    ReplyDelete
  10. PeterOctober 2, 2013 at 12:54 PM

    thanks

    ReplyDelete
  11. AnonymousJanuary 21, 2014 at 6:52 AM

    It helped a lot. Thanks!

    ReplyDelete
  12. AnonymousMarch 24, 2014 at 2:05 PM

    Thanks.

    ReplyDelete
  13. UnknownMay 6, 2014 at 12:25 AM

    thanks.

    ReplyDelete
  14. UnknownMay 30, 2014 at 8:59 AM

    thanks! :)

    ReplyDelete
  15. SubrahmanyamJune 25, 2014 at 7:02 AM

    Thank you very much :)

    ReplyDelete
  16. Kevin DominiqueDecember 12, 2014 at 7:30 AM

    Thanks

    ReplyDelete
  17. AnonymousFebruary 12, 2016 at 1:01 AM

    Thanks that helped

    ReplyDelete
  18. UnknownMarch 16, 2016 at 3:37 AM

    Thank You. :-)

    ReplyDelete
  19. GauravJune 9, 2016 at 5:36 AM

    Thanks , that did the trick !!!

    ReplyDelete
  20. AnonymousNovember 22, 2017 at 7:21 AM

    There's another scenario where you can get this error with a TestClass attribute defined - if you have a DeploymentItem attribute with a disallowed output path like @"\" then you'll get this error.

    ReplyDelete
  21. AnonymousNovember 22, 2017 at 7:21 AM

    There's another scenario where you can get this error with a TestClass attribute defined - if you have a DeploymentItem attribute with a disallowed output path like @"\" then you'll get this error.

    ReplyDelete
  22. Chandra Mohan DastiAugust 17, 2018 at 12:53 AM

    Same issue I got and resolved.. Thank you!

    ReplyDelete

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