Upgrade from .testsettings to .runsettings
You can upgrade your test configuration file from .testsettings to .runsettings with the SettingsMigrator tool that installs along with Visual Studio. Depending on your Visual Studio install location, you can find the settings migrator tool in the following path:
C:\Program Files\Microsoft Visual Studio\2022\Enterprise\Common7\IDE\Extensions\TestPlatform\SettingsMigrator.exe
C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\Common7\IDE\Extensions\TestPlatform\SettingsMigrator.exe
In the correct directory location, you can run the tool with the format below:
SettingsMigrator.exe <Full path to testsettings file to be migrated>
SettingsMigrator.exe <Full path to testsettings file to be migrated> <Full path to runsettings file to be created>
Examples
SettingsMigrator.exe E:\MyTest\MyTestSettings.testsettings
SettingsMigrator.exe E:\MyTest\MyTestSettings.testsettings E:\MyTest\MyNewRunSettings.runsettings
If you're interested in reading more on how the .testsettings options convert to .runsettings you can find more implementation details in the open source test platform repository on GitHub.