Tests from _Exclude_APIV1_ Tests do not get loaded in Test Tool and run

Issue
I want to run tests for the standard app _Exclude_APIV1_. Have build a pipeline to deploy the test app _Exclude_APIV1_ Tests, which does get deployed but these test tool do not get run. I made a backup after the pipeline was run and clearly the test tool was empty. I can, however, add them as they do reside in the database.

Doing the same with, for example, Tests-Bank it works fine, so, the issue here seems related to the fact that _Exclude_APIV1_ is a "hidden" extension.

Tests-Bank yaml
https://github.com/fluxxus-nl/TestFixtureInitializer/blob/master/TestFixtureInitializer/Azure%20Pipelines/azure-pipelines-BANK%20-%20onprem.yml

_Exclude_APIV1_ Tests yaml
https://github.com/fluxxus-nl/TestFixtureInitializer/blob/master/TestFixtureInitializer/Azure%20Pipelines/azure-pipelines-APIV1%20-%20onprem.yml

Expected behavior
All tests in Exclude_APIV1 Tests are executed.

Start by comparing azure-pipelines-BANK - onprem.yml with azure-pipelines-APIV1 - onprem.yml, then inspect the repository's test-tool handling for hidden extensions such as Exclude_APIV1. Reproduce the pipeline deployment and verify that the deployed Exclude_APIV1 Tests appear in the test tool and are executed.