Switching engine to 'run all tests manually' enqueues all tests to run

I was in engine mode 1, with 15 or so tests queued for execution. I wanted to stop all tests from being run so I switched to engine mode 4, run all tests manually. Instantly all 2.7k tests were enqueued for execution which is the the exact opposite of what I was after.

This seems to happen every single time I switch to 'run all tests manually mode.'

Hi, thanks for sharing this issue.

The default list of engine modes places 'Run all tests manually' as engine mode 2. This suggests that your list of engine modes has changed from the default.

Check that the 'Run all tests manually' engine mode underneath the Custom Engine Modes dialog. The Automatic Test Filter for this engine mode should be set to 'False' with no other conditions. If you're unsure about this, the easiest way to confirm the correct arrangement is to shut down and re-open the IDE with no projects open, then create a new empty solution. The engine modes will then be populated with the defaults.

Aha, thank you, that is the issue, someone has been messing with the defaults!