Cancelation test failure in CI

Seen in https://buildkite.com/julialang/julia-pr/builds/1528#01a007bd-9e36-4ab4-a06f-e3d98fabdb2d ``` Error in testset cancellation: --   | Test Failed at julialang/julia-pr/julia-fec0c95b10/share/julia/test/cancellation.jl:2210   | Expression: exited === :ok   | Evaluated: :timed_out === :ok   | Error in testset cancellation:   | Test Failed at julialang/julia-pr/julia-fec0c95b10/share/julia/test/cancellation.jl:2217   | Expression: p.termsignal == Base.SIGTERM \|\| p.exitcode == 128 + Base.SIGTERM ```