Flaky unit test suite

ImprovedTestCase.cs

 [Fact(DisplayName = @"
    GIVEN 
        that document Atendence List is published
        AND SteveJobs is the elaborator
        AND SteveJobs requested a new revision
        AND the request is still open
        AND SteveJobs has an open and closed revision request
    WHEN 
        I replace SteveJobs with MrCatra
    THEN 
        MrCatra should be the new responsible of the open revision request of the Attendance List document
        AND SteveJobs should still be the responsible of the closed revision request
")]
public async void Replace_ShouldChangeResponsibleForRevisionRequest()
{
    // Arrange
    var context = InMemoryContextFactory.Create();
    var document = DocumentMother.DocumentWithOnePublishedRevision(1, "CEA001", null, 1, UserMother.SteveJobs(), null);
    var revision = document.GetLastPublishedRevision();
    revision.RequestNewRevision("old revision request", UserMother.SteveJobsId);
    revision.RejectRevisionRequest("rejected");
    revision.RequestNewRevision("new revision request", UserMother.SteveJobsId);
    await context.Documents.AddAsync(document);
    await context.SaveChangesAsync();
    context.DetachAllEntities();
    var service = ReplaceResponsibleServiceFactory.Create(context);

    //Act
    await service.Replace(UserMother.SteveJobsId, UserMother.MrCatraId);

    //Assert
    var unitOfWork = UnitOfWorkFactory.Create(context);
    var documentFromDatabase = unitOfWork.Document.Find(document.Id);

    documentFromDatabase
        .GetLastPublishedRevision()
        .GetOpenRevisionRequest()
        .ResponsibleId
        .Should()
        .Be(UserMother.MrCatraId, "because we replaced SteveJobs with MrCatra and SteveJobs was the requester of this revision");

    documentFromDatabase
        .GetLastPublishedRevision()
        .GetClosedRevisionRequest()
        .ResponsibleId
        .Should()
        .Be(UserMother.SteveJobsId, "because we shouldnt change history");
}