Testing mapping code
Yes, you can make it less verbose.

I assume you are using AutoFixture in you call to Create()?

If so, this will create random values out of the box. No need to specify the content and assign each property. Create the source object for mapping, map it, compare the mapped values with the properties on the source object:

    [Test]
    public void Map_Always_SetsSimpleProperties()
    {
        var doc = fixture.Create&lt;Notification223&gt;(); // Autofixture will fill properties with random data.
        var sut = CreateSut();

        var actual = sut.Map(doc);

        Assert.That(actual.AuctionPlace, Is.EqualTo(doc.AuctionPlace));
        Assert.That(actual.SubmissionCloseDateTime, Is.EqualTo(doc.SubmissionCloseDateTime));
        Assert.That(actual.QuotationForm, Is.EqualTo(doc.QuotationForm));
        Assert.That(actual.QuotationExaminationDateTime, Is.EqualTo(doc.QuotationExaminationDateTime));
        Assert.That(actual.EnvelopeOpeningTime, Is.EqualTo(doc.EnvelopeOpeningTime));
        Assert.That(actual.EnvelopeOpeningPlace, Is.EqualTo(doc.EnvelopeOpeningPlace));
        Assert.That(actual.AuctionDateTime, Is.EqualTo(doc.AuctionDateTime));
        Assert.That(actual.ApplExamPeriodDateTime, Is.EqualTo(doc.ApplExamPeriodDateTime));
        Assert.That(actual.ConsiderationSecondPartDate, Is.EqualTo(doc.ConsiderationSecondPartDate));
    }