Tests of assertion errors seem to behave differently on the web #102086

I am attempting to write a test that exercises an assertion that would get thrown during paint, see f1b701d

I've found that this test works fine on mobile/desktop, but when run on the web the assertion errors seem to be uncaught/uncatchable:

https://logs.chromium.org/logs/flutter/buildbucket/cr-buildbucket/8816572064274580753/+/u/run_test.dart_for_web_tests_shard_and_subshard_3/test_stdout

I cannot reproduce this locally, as the test times out when compiling after many minutes. Filing as an issue so these tests can be skipped