yoga/csharp/tests/Facebook.Yoga.Universal.Tests/UnitTestApp.xaml

<Application
    x:Class="Facebook.CSSLayout.Universal.Tests.App"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:Facebook.CSSLayout.Universal.Tests"
    RequestedTheme="Light">

</Application>