Edge 44.17763 and Chrome 70 make this 300px wide. FF makes it 150px wide.

Summary

Harness status: OK

Found 1 tests

Details

ResultTest NameMessage
Pass#stf 1
Asserts run
Pass
assert_true(true, "data-expected-width is a valid data attribute")
    at checkDataKeys ( /resources/check-layout-th.js:61:13)