On this page of JetBrains Rider options, you can adjust general settings that apply to all unit testing features.
Default platform architecture
This selector allows choosing a platform to run unit tests on.
Default .NET Framework version
This selector allows setting .NET version to use when running unit tests.
Run up to [number of assemblies] assemblies in parallel
Select the number of assemblies to be tested by JetBrains Rider concurrently in parallel threads.
Skip tests from categories
Type names of test categories to be excluded from the run. The tests associated with the category that you specified are ignored. For more information, see Working with Test Categories
Run tests from:
Choose Project output folder to run compiled tests from the default location. When assemblies are placed in the default project location, test files are retrieved from the same location.
Choose Specified folder to run tests using a post-build step, so the tests are run from the particular folder. Enter the desired path in the text box, or click Browse to find and set the desired location.
Unit Test Sessions
Save and restore Unit Test Sessions
Select this check box to allow JetBrains Rider to restore unit test sessions when you close and reopen Rider.
Activate Unit Test Session window when tun starts
Select this check box if you want Unit Tests window to open each time you run unit tests.
Unit Test Output
Wrap long lines in Unit Test Session output
Defines how to display long lines in the Output tab in the Unit Tests window. If this check box is selected, long lines are wrapped.
Limit auto-loaded output to:
Defines how to many lines should be displayed in the Output tab in the Unit Tests window.