Dynamically skippable tests are nice, but their status isn't reflected in the results. To support XUnit.SkippableFact (NUGET-package):

Make the following changes in xunit:

1. function RunTests - add:
   runner.OnTestSkipped = info => AddTestResult(info);

2. class TestResultSummary - add:
   public bool Skipped() => _testInfo is Xunit.Runners.TestSkippedInfo;

3. TestResultSummary / public object Status - add:
   _testInfo is Xunit.Runners.TestSkippedInfo ? Util.WithStyle ("Skipped", "color:orange") :

To test it:

[SkippableFact]
void Test_Xunit3()
{
Skip.If(true, "skipping");
Assert.True(1 + 1 == 2);
}

[SkippableTheory]
[InlineData(1)]
[InlineData(2)]
void Test_Xunit4(int x)
{
Skip.If(x==2, "skipping");
Assert.True(1 + 1 == 2);
}

Note: Those changes will also work with the plain XUnit. So adding the changes to the code does not harm.

See also here:
https://stackoverflow.com/a/61792306/1016343