In this page of JetBrains Rider options, you can adjust unit testing settings related to MSTest tests.
|Enable MSTest support|
By default, JetBrains Rider adds action indicators allowing you to execute MSTest tests right from the editor and automatically discovers MSTest tests in your solution. Clear this checkbox to disable this behavior.
|Choose the IDE folder|
As MSTest v1 is not distributed without Visual Studio, you have to specify the IDE folder inside a Visual Studio installation on your machine. JetBrains Rider will find all necessary executables in this folder.
|Test Settings|| |
Specify a custom test settings configuration (.testsettings file within your solution).