Test ignored if nullable enum used as parameter

[Dona278]

This test won't run:

[Test]
[Arguments(new FlagMock[] { }, null)]
[Arguments(new FlagMock[] { FlagMock.Two }, FlagMock.Two)]
[Arguments(new FlagMock[] { FlagMock.One, FlagMock.Three }, FlagMock.One | FlagMock.Three)]
public async Task Get_Flag(FlagMock[] flags, FlagMock? expected)
{
    await Assert.That(FlagsHelper.GetFlags(flags)).IsEqualTo(expected);
}

but if I change the last parameter to non-nullable version it runs (and fail because pass the default value, but I really want null):

// This signature works
public async Task Get_Flag(FlagMock[] flags, FlagMock expected)

[Dona278]

Updated to 0.61.31 and still not work..

[thomhurst]

@Dona278 What output do you get with dotnet run ?

[Dona278]

dotnet run show all sucess..
So I double checked what VS show in "Tests explorer" and there is something strange because some tests are duplicated:

If I select one from what you can see "green" I can run/debug it, "blue" no.. and the same behavior (unable to debug or run) occur from code if I try to run / debug with mouse right click.

[thomhurst]

Wonder if it's something to do with VS?

Rider seems to work for me: