Fix SimUtils tests

[nandor]

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[t14916]

LGTM, Probably request @davidbiancolin for checking over the scala tests. As an FYI scalafmt isn't passing so might still need to reformat the tests.

[davidbiancolin]

make scalafmtAll should do it

[davidbiancolin]

LGTM

[davidbiancolin]

It's late in europe so i'll just fix this up