Fix tests

[yurabakhtin]

https://github.com/humhub/humhub-internal/issues/191#issuecomment-3409803709

[yurabakhtin]

@luke- I am not sure how to solve the conflict with the file composer.lock because I prefer to remove it from repo as I described here only if you don't have an important reason to keep it here.

[yurabakhtin]

@luke- Here I see you wrote:

Hint: Make sure to always commit the composer.lock as well.

Ok, I will try again to commit the file to see how tests works again.

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After merging new changes from master all tests work well even with the composer.lock, so ok let's keep it as before.
This PR is ready for merging.