How to provide multiple exclusions in VsTest Task TestCategory

Question

I am trying to exclude two testing categories from the VS Test task.

I tried including TestCategory!=Monitor|TestCategory!=Regression, but that didn't exclude either category.

I know that when I ran it only as "TestCategory!=Monitor" it properly excluded that group.

So then I tried running the tests with "TestCategory=Regression" and noticed it ran those fine as well.

But, when I try excluded two categories it doesn't seem to work.

Based on this link it seems like I am doing it correctly https://jessehouwing.net/staged-execution-of-tests-in-azure-devops-pipelines/

I also found https://github.com/microsoft/vstest-docs/issues/233 but when I tested with "TestCategory=Smoke|TestCategory=Monitor" it ran fine. I'm wondering if you just can't have multiple !=