The fact that #12 popped up without the CI failing indicates that there is something wrong with the tests. I think the issue is that the docker image already has Julia installed. Thus, you can successfully run julia --version without even installing it via asdf. A potential fix would be to use another docker image. Another solution would be to run the very binary that was installed (/home/user/.asdf/shims/julia) or remove the pre-installed Julia binary before running the test.
The fact that #12 popped up without the CI failing indicates that there is something wrong with the tests. I think the issue is that the docker image already has Julia installed. Thus, you can successfully run
julia --versionwithout even installing it viaasdf. A potential fix would be to use another docker image. Another solution would be to run the very binary that was installed (/home/user/.asdf/shims/julia) or remove the pre-installed Julia binary before running the test.