# Can not use SeleniumTestability Library

**URL:** <https://forum.robotframework.org/t/can-not-use-seleniumtestability-library/4408>\
**Category:** Libraries\
**Created:** [27 July 2022 06:41 UTC](https://forum.robotframework.org/t/can-not-use-seleniumtestability-library/4408 "2022-07-27T06:41:22Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![weeranuch](https://avatars.discourse-cdn.com/v4/letter/w/cab0a1/32.png) [@weeranuch](https://forum.robotframework.org/u/weeranuch)\
**Post date:** [27 July 2022 06:41 UTC](https://forum.robotframework.org/t/can-not-use-seleniumtestability-library/4408/1 "2022-07-27T06:41:23Z")

</div>

Error  
Initializing library ‘SeleniumLibrary’ with arguments [plugins=SeleniumTestability] failed: Importing test library ‘SeleniumTestability’ failed: AttributeError: type object ‘DesiredCapabilities’ has no attribute ‘OPERA’  
I not use opera.