System.IO.Tests.Enumeration.SpecialDirectoryTests_Enumerable.SkippingHiddenFiles test fails on Windows 10 2004

[ViktorHofer]

System.IO.Tests.Enumeration.SpecialDirectoryTests_Enumerable.SkippingHiddenFiles [FAIL]
        Assert.Contains() Failure
        Not found: .
        In value:  String[] [".."]
        Stack Trace:
          C:\git\runtime4\src\libraries\System.IO.FileSystem\tests\Enumeration\SpecialDirectoryTests.cs(64,0): at System.IO.Tests.Enumeration.SpecialDirectoryTests_Enumerable.SkippingHiddenFiles()

OS build: 19574.1000

cc @JeremyKuhne @carlossanlop @jozkee

[JeremyKuhne]

Interesting. @ViktorHofer does this fail consistently for you?

[ViktorHofer]

No, not consistently.

[ViktorHofer]

Just ran the tests again and it failed 3 out of 5 runs.

[ViktorHofer]

Still failing for me locally with dotnet test:

[xUnit.net 00:00:04.49]     System.IO.Tests.Enumeration.SpecialDirectoryTests_DirectoryInfo_GetDirectories.SkippingHiddenFiles [FAIL]
  Failed System.IO.Tests.Enumeration.SpecialDirectoryTests_DirectoryInfo_GetDirectories.SkippingHiddenFiles [30 ms]
  Error Message:
   Assert.Contains() Failure
Not found: .
In value:  String[] [".."]
  Stack Trace:
     at System.IO.Tests.Enumeration.SpecialDirectoryTests_Enumerable.SkippingHiddenFiles() in C:\git\runtime2\src\libraries\System.IO.FileSystem\tests\Enumeration\SpecialDirectoryTests.cs:line 63

cc @carlossanlop @adamsitnik