Actually, it fails on multiple windows jobs, as it can be seen [here](https://treeherder.mozilla.org/jobs?repo=try&group_state=expanded&resultStatus=success%2Cpending%2Crunning%2Ctestfailed%2Cbusted%2Cexception%2Crunnable&searchStr=wpt2%2Cwindows&revision=3ba0943675b534aefdd31fe60bc79c211c69849b&selectedTaskRun=ci8eRJ9NQgyRCdzU4sT0yA.0).
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Actually, it fails on multiple windows jobs, as it can be seen [here](https://treeherder.mozilla.org/jobs?repo=try&group_state=expanded&selectedTaskRun=DFeMwotITnmlB_L9o1hO8w.0&resultStatus=pending%2Crunning%2Ctestfailed%2Cbusted%2Cexception%2Crunnable&searchStr=wpt%2Cwindows&revision=3ba0943675b534aefdd31fe60bc79c211c69849b&test_paths=webcodecs).