This may also have impact on this test: https://searchfox.org/mozilla-central/source/testing/web-platform/tests/css/css-sizing/aspect-ratio/flex-aspect-ratio-008.tentative.html after introducing `aspect-ratio` property.
Bug 1056959 Comment 5 Edit History
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This may also have impact on this test: https://searchfox.org/mozilla-central/source/testing/web-platform/tests/css/css-sizing/aspect-ratio/flex-aspect-ratio-009.tentative.html after introducing `aspect-ratio` property.