Configurations can be used to specify for any Test Run, which hardware or software configuration this run should be performed on.

Configuration groups are found in Projects:

Imagine that your team is working on a web application, and you want to test its behavior in several different browsers. For that, you can create a "Browsers" configuration group and list all the browsers you plan to be performing testing in:

Once your configuration group has been created, and you've added all possible individual configurations to test on, you can now specify this while preparing a test run - all available configuration groups will be shown in the "Configurations" section:

You can create multiple configuration groups and have combinations of, for example, different browsers and different OS:

You can also edit or delete both configuration groups and individual configurations after having created them:

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