How to suppress InMemoryEventId.TransactionIgnoredWarning when unit testing with in-memory database with transactions?

In the code where you declare the in-memory database, configure the context to ignore that error as follows:

public MyDbContext GetContextWithInMemoryDb()
{
    var options = new DbContextOptionsBuilder<MyDbContext>()
        .UseInMemoryDatabase(Guid.NewGuid().ToString())
        // don't raise the error warning us that the in memory db doesn't support transactions
        .ConfigureWarnings(x => x.Ignore(InMemoryEventId.TransactionIgnoredWarning))
        .Options;

    return new MyDbContext(options); 
}

I used the answer from @tomRedox but varied it for use in an ASP.NET Core 2.0 startup.cs file.

services.AddDbContext<MyDbContext>(options =>
{
    options.UseInMemoryDatabase("TestDb");
    options.ConfigureWarnings(x => x.Ignore(InMemoryEventId.TransactionIgnoredWarning));
});