Possible to extend the gitlab runner timeout?

The ASDF tests on Clozure Common Lisp now reliably fail with timeout.  I =
wonder if it would be possible to extend the timeout for these tests?

An alternative might be to split the tests into multiple sub-tests, run o=
n different cores. I've done that for another library elsewhere. However,=
 I doubt that the ASDF tests are concurrency-safe, since their correctnes=
s involves interaction with the state of the filesystem.  So probably it =
would not be enough to split the tests across cores, but they would proba=
bly have to be split across containers, as well. This might be quite a bi=
t of work, requiring more understanding of how GitLab CI than I have.

Any suggestions?

Thanks,
R