ng test does not run tests from new test files when watching

[reduckted]

Command

test

Is this a regression?

• Yes, this behavior used to work in the previous version

The previous version in which this bug was not present was

No response

Description

While ng test is running and watching for changes, if you add a new test file, that file is detected and causes the tests to run again, but the tests in that new file are not included in the test run. To include the tests from the new file, you need to restart the ng test process.

Minimal Reproduction

1. In a terminal, run:

ng new watch --skip-git --style css --ssr=false 
ng test

2. Three tests are run.
3. In a second terminal, run:

ng g component widget

4. A new component is created with a test file that contains one test.
5. The new test file is detected and the tests recompile.
6. Only three tests are run.
7. Add another test to the new component's test file.
8. The change is detected and the tests recompile.
9. Only three tests are run.
10. Kill the ng test process.
11. Run ng test again.
12. Five tests are run.

Exception or Error

No response

Your Environment

_                      _                 ____ _     ___
    / \   _ __   __ _ _   _| | __ _ _ __     / ___| |   |_ _|
   / △ \ | '_ \ / _` | | | | |/ _` | '__|   | |   | |    | |
  / ___ \| | | | (_| | |_| | | (_| | |      | |___| |___ | |
 /_/   \_\_| |_|\__, |\__,_|_|\__,_|_|       \____|_____|___|
                |___/


Angular CLI: 17.0.3
Node: 20.9.0
Package Manager: npm 10.1.0
OS: win32 x64

Angular:
...

Package                      Version
------------------------------------------------------
@angular-devkit/architect    0.1700.3 (cli-only)
@angular-devkit/core         17.0.3 (cli-only)
@angular-devkit/schematics   17.0.3 (cli-only)
@schematics/angular          17.0.3 (cli-only)

Anything else relevant?

Here's a screen recording to help explain what I'm seeing.

[luiz-soares]

this got freq1:low label meaning it's rarely observed, but it happens all the time, are there any workarounds?