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If you are not sure if you need tests, consider this rule of thumb: the purpose of a test is to make sure someone doesn't accidentally revert the fix. Ask yourself, is there anything in your PR that you feel it is important we not accidentally revert back to how it was before your fix?

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https://ci.chromium.org/ui/p/flutter/builders/prod/Mac_ios%20complex_layout_scroll_perf_ios__timeline_summary/1920/overview

Maybe this?

ld: '/opt/flutter/xcode/12c33/XCode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/Frameworks/XCTest.framework/XCTest' does not contain bitcode. You must rebuild it with bitcode enabled (Xcode setting ENABLE_BITCODE), obtain an updated library from the vendor, or disable bitcode for this target. file '/opt/flutter/xcode/12c33/XCode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/Frameworks/XCTest.framework/XCTest' for architecture arm64

LGTM, thanks@zanderso

Merging to green the build.