Describe the bug
When building the test suite with make -C t PROVE_EXTRA_ARGS="-j40 -v", the tests pass. However, when turning the parallelism down to -j4, the t-credentials.sh fails consistently on test 13 - credentials with bad netrc creds will retry

To Reproduce
Steps to reproduce the behavior:

1. make tests with make -C t PROVE_EXTRA_ARGS="-j4 -v"
2. see how they fail

Expected behavior
Passing test suit, same as when running with -j40

This issue occurred, when building git-lfs for CentOS Stream. We use make -C t PROVE_EXTRA_ARGS="-j$(getconf _NPROCESSORS_ONLN) -v" to get the number of physical cores present on the build system. When building in Koji, we can't see the issue, because by default we use -j40, however Zuul CI running on MR in our GitLab uses -j4, which then fails.
I was able to reproduce this locally in mockbuild environment.

As I don't really know the test suite of git-lfs, I don't know what is the root cause of the problem.