diff --git a/CHANGELOG.md b/CHANGELOG.md
index 684d597db3cf505eb7da728414213107081b49c1..5041c0001ad726726980824e07b2784e8c5e8177 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added (for new features)
 
+* Tests for deeply nested SELECT queries
+- Tests for [#62](https://gitlab.com/caosdb/caosdb-server/-/issues/62)
 * Tests for One-time Authentication Tokens
 * Test for [caosdb-pylib#31](https://gitlab.com/caosdb/caosdb-pylib/-/issues/31)
 * Tests for [caosdb-server#62](https://gitlab.com/caosdb/caosdb-server/-/issues/62)
diff --git a/tests/test_datatype.py b/tests/test_datatype.py
index a7b14d3def80a5504f37278aa9f5ab04cb698438..ce800b49b8c12f6a949a48489b5ac9e00ee1010c 100644
--- a/tests/test_datatype.py
+++ b/tests/test_datatype.py
@@ -26,8 +26,7 @@
 @author: tf
 """
 import caosdb as db
-# @UnresolvedImport
-from nose.tools import nottest, assert_raises, with_setup, assert_true, assert_equal
+from pytest import raises
 
 
 def setup():
@@ -44,24 +43,20 @@ def teardown():
         pass
 
 
-@with_setup(setup, teardown)
 def test_override_with_non_existing_ref():
     rt1 = db.RecordType("TestRecordType1").insert()
     rt2 = db.RecordType("TestRecordType2").insert()
     db.Property("TestProperty", datatype=db.TEXT).insert()
 
-    with assert_raises(db.TransactionError) as cm:
+    with raises(db.TransactionError) as cm:
         db.Record(
             name="TestRecord").add_property(
             name="TestProperty",
             datatype=rt2,
             value="Non-Existing").add_parent(rt1).insert()
-    assert_equal(
-        cm.exception.get_errors()[0].msg,
-        "Referenced entity does not exist.")
+    assert cm.value.get_errors()[0].msg == "Referenced entity does not exist."
 
 
-@with_setup(setup, teardown)
 def test_override_with_existing_ref():
     rt1 = db.RecordType("TestRecordType1").insert()
     rt2 = db.RecordType("TestRecordType2").insert()
@@ -74,10 +69,9 @@ def test_override_with_existing_ref():
         datatype=rt2,
         value="TestRecord").add_parent(rt1).insert()
 
-    assert_true(rec2.is_valid())
+    assert rec2.is_valid() is True
 
 
-@with_setup(setup, teardown)
 def test_reference_datatype_sequencial():
     rt = db.RecordType(name="TestRT", description="TestRTDesc").insert()
     p = db.Property(
@@ -85,22 +79,21 @@ def test_reference_datatype_sequencial():
         description="RefOnTestRT",
         datatype="TestRT").insert()
 
-    assert_true(p.is_valid())
+    assert p.is_valid() is True
 
     dt = db.execute_query("FIND TestProp", unique=True).datatype
-    assert_equal(dt, "TestRT")
+    assert dt == "TestRT"
 
     rt2 = db.RecordType(
         "TestRT2",
         description="TestRT2Desc").add_property(
         name="TestProp",
         value="TestRT").insert()
-    assert_true(rt2.is_valid())
-    assert_equal(rt2.get_property("TestProp").value, rt.id)
-    assert_equal(rt2.get_property("TestProp").datatype, "TestRT")
+    assert rt2.is_valid() is True
+    assert rt2.get_property("TestProp").value == rt.id
+    assert rt2.get_property("TestProp").datatype == "TestRT"
 
 
-@with_setup(setup, teardown)
 def test_reference_datatype_at_once():
     rt = db.RecordType(name="TestRT")
     rt2 = db.RecordType(name="TestRT2").add_property(name="TestProp")
@@ -112,10 +105,9 @@ def test_reference_datatype_at_once():
     p = db.Property(name="TestProp", datatype="TestRT")
 
     c = db.Container().extend([rt, rt2, rec, rec2, p]).insert()
-    assert_true(c.is_valid())
+    assert c.is_valid() is True
 
 
-@with_setup(setup, teardown)
 def test_generic_reference_success():
     rt1 = db.RecordType(name="TestRT1").insert()
     rt2 = db.RecordType(name="TestRT2").insert()
@@ -127,14 +119,13 @@ def test_generic_reference_success():
             name="TestP1",
         value=rec1.id).insert()
 
-    assert_true(rt1.is_valid())
-    assert_true(rt2.is_valid())
-    assert_true(p.is_valid())
-    assert_true(rec1.is_valid())
-    assert_true(rec2.is_valid())
+    assert rt1.is_valid() is True
+    assert rt2.is_valid() is True
+    assert p.is_valid() is True
+    assert rec1.is_valid() is True
+    assert rec2.is_valid() is True
 
 
-@with_setup(setup, teardown)
 def test_generic_reference_failure():
     db.RecordType(name="TestRT2").insert()
     db.Property(name="TestP1", datatype=db.REFERENCE).insert()
@@ -143,49 +134,45 @@ def test_generic_reference_failure():
         name="TestRT2").add_property(
             name="TestP1",
         value="asdf")
-    assert_raises(db.TransactionError, rec2.insert)
+    raises(db.TransactionError, rec2.insert)
 
 
-@with_setup(setup, teardown)
 def test_unknown_datatype1():
     p = db.Property(name="TestP", datatype="Non-Existing")
     try:
         p.insert()
-        assert_true(False)
+        assert False is True
     except db.TransactionError as e:
-        assert_equal(e.msg, "Unknown datatype.")
+        assert e.msg == "Unknown datatype."
 
 
-@with_setup(setup, teardown)
 def test_unknown_datatype2():
     p = db.Property(name="TestP", datatype="12345687654334567")
     try:
         p.insert()
-        assert_true(False)
+        assert False is True
     except db.TransactionError as e:
-        assert_equal(e.msg, "Unknown datatype.")
+        assert e.msg == "Unknown datatype."
 
 
-@with_setup(setup, teardown)
 def test_unknown_datatype3():
     p = db.Property(name="TestP", datatype="-134")
     try:
         p.insert()
-        assert_true(False)
+        assert False is True
     except db.TransactionError as e:
-        assert_equal(e.msg, "Unknown datatype.")
+        assert e.msg == "Unknown datatype."
 
 
-@with_setup(setup, teardown)
 def test_wrong_refid():
     rt1 = db.RecordType(name="TestRT1").insert()
     rt2 = db.RecordType(name="TestRT2").insert()
     rt3 = db.RecordType(name="TestRT3").insert()
     p = db.Property(name="TestP1", datatype=rt1.id).insert()
-    assert_true(p.is_valid())
-    assert_true(rt1.is_valid())
-    assert_true(rt2.is_valid())
-    assert_true(rt3.is_valid())
+    assert p.is_valid() is True
+    assert rt1.is_valid() is True
+    assert rt2.is_valid() is True
+    assert rt3.is_valid() is True
 
     rec1 = db.Record().add_parent(name="TestRT1").insert()
     rec2 = db.Record().add_parent(name="TestRT2").insert()
@@ -195,14 +182,32 @@ def test_wrong_refid():
         value=rec2.id)
     try:
         rec3.insert()
-        assert_true(False)
+        assert False is True
     except db.TransactionError:
-        assert_equal(
-            rec3.get_property("TestP1").get_errors()[0].description,
-            'Reference not qualified. The value of this Reference Property is to be a child of its data type.')
+        desc = ('Reference not qualified. The value of this Reference '
+                'Property is to be a child of its data type.')
+        err = rec3.get_property("TestP1").get_errors()[0]
+        assert err.description == desc
 
     rec4 = db.Record().add_parent(
         name="TestRT3").add_property(
         name="TestP1",
         value=rec1.id).insert()
-    assert_true(rec4.is_valid())
+    assert rec4.is_valid() is True
+
+
+def test_datatype_mismatch_in_response():
+    p = db.Property("TestDoubleProperty", datatype=db.DOUBLE).insert()
+
+    with raises(ValueError) as exc:
+        rt = db.RecordType().add_property(p, "not a double")
+        assert exc.value.args[0] == ("could not convert string to "
+                                     "float: 'not a double'")
+
+    # add property by name,
+    rt = db.RecordType("TestEntity").add_property(p.name, "not a double")
+
+    with raises(db.TransactionError) as exc:
+        # should not raise ValueError but transaction error.
+        rt.insert()
+    assert exc.value.get_errors()[0].msg == "Cannot parse value to double."
diff --git a/tests/test_query.py b/tests/test_query.py
index 9b188d9c94f964508ef254506ea19783fd02b5b6..8432b37d92c87d772ff07c0b4772def48b6aaab1 100644
--- a/tests/test_query.py
+++ b/tests/test_query.py
@@ -1002,3 +1002,25 @@ def test_query_by_name():
     assert len(h.execute_query("FIND TestRT WITH name LIKE 'TestRec*'")) == 2
     assert len(h.execute_query("FIND TestRT WITH name LIKE '*Rec*'")) == 2
     assert len(h.execute_query("FIND ENTITY WITH name LIKE 'TestRec*'")) == 2
+
+
+@mark.xfail(reason="Issue: https://gitlab.com/caosdb/caosdb-server/-/issues/96")
+def test_referenced_as():
+    rt_person = db.RecordType("TestPerson").insert()
+    db.RecordType("TestParty").insert()
+
+    # three persons
+    g1 = db.Record().add_parent("TestPerson").insert()
+    g2 = db.Record().add_parent("TestPerson").insert()
+    g3 = db.Record().add_parent("TestPerson").insert()
+    guest_ids = set(g1.id, g2.id, g3.id)
+
+    party = db.Record(
+        "Diamond Jubilee of Elizabeth II").add_parent("TestParty")
+    party.add_property(rt_person, datatype=db.LIST(rt_person), name="Guests",
+                       value=[g1, g2, g3])
+    party.insert()
+    guests = db.execute_query("FIND RECORD TestPerson WHICH IS REFERENCED BY "
+                              "TestParty AS Guests")
+    assert len(guests) == 3
+    assert set([e.id for e in guests]) == guest_ids
diff --git a/tests/test_select.py b/tests/test_select.py
index 748b85dd07d85a32e5e4643f562204433639da04..66c3992d1519f101b7b18941924b9bd939fa0066 100644
--- a/tests/test_select.py
+++ b/tests/test_select.py
@@ -25,123 +25,304 @@
 
 @author: tf
 """
-import caosdb as h
-
-# @UnresolvedImport
-from nose.tools import assert_true, assert_equal, assert_is_not_none, assert_is_none
+import caosdb as db
 
 
 def setup_module():
-    print("SETUP")
     teardown_module()
-    h.Property(name="TestPropertyOne", datatype=h.TEXT).insert()
-    h.Property(
+    db.Property(name="TestPropertyOne", datatype=db.TEXT).insert()
+    db.Property(
         name="TestPropertyTwo",
         description="Desc2",
-        datatype=h.TEXT).insert()
-    h.RecordType(
+        datatype=db.TEXT).insert()
+    db.RecordType(
         name="TestRecordType",
         description="DescRecTy").add_property(
-        name="TestPropertyOne").add_property(
-            name="TestPropertyTwo").insert()
+        name="TestPropertyOne", value="v1").add_property(
+            name="TestPropertyTwo", value="v2").insert()
+    rt_house = db.RecordType("TestHouse", description="TestHouseDesc").insert()
+    db.RecordType("TestWindow").insert()
+    rt_person = db.RecordType("TestPerson",
+                              description="TestPersonDesc").insert()
+    db.RecordType("TestParty", description="TestPartyDesc").insert()
+    db.Property("TestHeight", description="TestHeightDesc", datatype=db.DOUBLE,
+                unit="ft").insert()
+    db.Property("TestDate", description="TestDateDesc",
+                datatype=db.DATETIME).insert()
+
+    window = db.Record("Window1",
+                       description="Window1Desc").add_parent("TestWindow")
+    window.add_property("TestHeight", 20.5, unit="ft")
+    window.insert()
+
+    owner = db.Record("The Queen").add_parent("TestPerson").insert()
+
+    house = db.Record("Buckingham Palace")
+    house.description = "A rather large house"
+    house.add_parent("TestHouse")
+    house.add_property(rt_person, name="TestOwner", value=owner)
+    house.add_property("TestWindow", window).insert()
+
+    g1 = db.Record().add_parent("TestPerson").insert()
+    g2 = db.Record().add_parent("TestPerson").insert()
+    g3 = db.Record().add_parent("TestPerson").insert()
+
+    party = db.Record(
+        "Diamond Jubilee of Elizabeth II").add_parent("TestParty")
+    party.add_property(rt_house, name="Location", value=house)
+    party.add_property("TestDate", "2012-02-06")
+    party.add_property(rt_person, datatype=db.LIST(rt_person), name="Guests",
+                       value=[g1, g2, g3])
+    party.insert()
 
 
 def teardown_module():
-    print("TEARDOWN")
-    try:
-        h.execute_query("FIND Test*").delete()
-    except BaseException:
-        pass
+    d = db.execute_query("FIND Test*")
+
+    if len(d) > 0:
+        d.delete()
 
 
 def test_id1():
-    p1 = h.execute_query("FIND TestPropertyOne", unique=True)
-    assert_true(p1.is_valid())
-    assert_is_not_none(p1.name)
-    assert_is_not_none(p1.datatype)
-    assert_is_none(p1.description)
+    p1 = db.execute_query("FIND TestPropertyOne", unique=True)
+    assert p1.is_valid() is True
+    assert p1.name is not None
+    assert p1.datatype is not None
+    assert p1.description is None
 
-    p1_c = h.execute_query("SELECT id FROM TestPropertyOne", unique=True)
-    assert_true(p1_c.is_valid())
-    assert_equal(p1_c.id, p1.id)
-    assert_is_none(p1_c.name)
-    assert_is_none(p1_c.datatype)
-    assert_is_none(p1_c.description)
+    p1_c = db.execute_query("SELECT id FROM TestPropertyOne", unique=True)
+    assert p1_c.is_valid() is True
+    assert p1_c.id == p1.id
+    assert p1_c.name is not None, "Name is always included"
+    assert p1_c.datatype is None
+    assert p1_c.description is None
 
 
 def test_id2():
-    p2 = h.execute_query("FIND TestPropertyTwo", unique=True)
-    assert_true(p2.is_valid())
-    assert_is_not_none(p2.name)
-    assert_is_not_none(p2.datatype)
-    assert_is_not_none(p2.description)
+    p2 = db.execute_query("FIND TestPropertyTwo", unique=True)
+    assert p2.is_valid() is True
+    assert p2.name is not None
+    assert p2.datatype is not None
+    assert p2.description is not None
 
-    p2_c = h.execute_query("SELECT id FROM TestPropertyTwo", unique=True)
-    assert_true(p2_c.is_valid())
-    assert_equal(p2_c.id, p2.id)
-    assert_is_none(p2_c.name)
-    assert_is_none(p2_c.datatype)
-    assert_is_none(p2_c.description)
+    p2_c = db.execute_query("SELECT id FROM TestPropertyTwo", unique=True)
+    assert p2_c.is_valid() is True
+    assert p2_c.id == p2.id
+    assert p2_c.name is not None, "Name is always included"
+    assert p2_c.datatype is None
+    assert p2_c.description is None
 
 
 def test_id3():
-    p3s = h.execute_query("SELECT description FROM TestProperty*")
-    assert_equal(len(p3s), 2)
+    p3s = db.execute_query("SELECT description FROM TestProperty*")
+    assert len(p3s) == 2
+
     for e in p3s:
-        assert_is_not_none(e.id)
+        assert e.id is not None
 
 
 def test_name1():
-    p3s = h.execute_query("SELECT description FROM TestProperty*")
-    assert_equal(len(p3s), 2)
+    p3s = db.execute_query("SELECT description FROM TestProperty*")
+    assert len(p3s) == 2
+
     for e in p3s:
-        assert_is_not_none(e.name)
+        assert e.name is not None
 
 
 def test_name2():
-    p3s = h.execute_query("SELECT name FROM TestProperty*")
-    assert_equal(len(p3s), 2)
+    p3s = db.execute_query("SELECT name FROM TestProperty*")
+    assert len(p3s) == 2
+
     for e in p3s:
-        assert_is_not_none(e.name)
-        assert_is_none(e.description)
+        assert e.name is not None
+        assert e.description is None
 
 
 def test_multi1():
-    p1 = h.execute_query(
+    p1 = db.execute_query(
         "SELECT id, name, description FROM TestPropertyOne",
         unique=True)
-    assert_is_not_none(p1.id)
-    assert_equal(p1.name, "TestPropertyOne")
-    assert_is_none(p1.description)
+    assert p1.id is not None
+    assert p1.name == "TestPropertyOne"
+    assert p1.description is None
 
-    p2 = h.execute_query(
+    p2 = db.execute_query(
         "SELECT id, name, description FROM TestPropertyTwo",
         unique=True)
-    assert_is_not_none(p2.id)
-    assert_equal(p2.name, "TestPropertyTwo")
-    assert_equal(p2.description, "Desc2")
+    assert p2.id is not None
+    assert p2.name == "TestPropertyTwo"
+    assert p2.description == "Desc2"
 
 
 def test_sub1():
-    rt = h.execute_query("FIND TestRecordType", unique=True)
-    assert_is_not_none(rt.id)
-    assert_is_not_none(rt.name)
-    assert_is_not_none(rt.get_property("TestPropertyOne"))
+    rt = db.execute_query("FIND TestRecordType", unique=True)
+    assert rt.id is not None
+    assert rt.name is not None
+    assert rt.get_property("TestPropertyOne") is not None
 
-    rt = h.execute_query(
+    rt = db.execute_query(
         "SELECT TestPropertyOne FROM TestRecordType",
         unique=True)
-    assert_is_not_none(rt.id)
-    assert_is_not_none(rt.name)
-    assert_is_not_none(rt.get_property("TestPropertyOne"))
+    assert rt.id is not None
+    assert rt.name is not None
+    assert rt.get_property("TestPropertyOne") is not None
+    assert rt.get_property("TestPropertyOne").value == "v1"
+    assert rt.get_property("TestPropertyTwo") is None
 
 
 def test_sub2():
-    rt = h.execute_query(
+    rt = db.execute_query(
         "SELECT TestPropertyTwo.description FROM TestRecordType",
         unique=True)
-    assert_is_not_none(rt.id)
-    assert_is_not_none(rt.name)
-    assert_is_not_none(rt.get_property("TestPropertyTwo"))
-    assert_equal(rt.get_property("TestPropertyTwo").description, "Desc2")
-    assert_is_none(rt.get_property("TestPropertyTwo").datatype)
+    assert rt.id is not None
+    assert rt.name is not None
+    assert rt.get_property("TestPropertyTwo") is not None
+    assert rt.get_property("TestPropertyTwo").description == "Desc2"
+    assert rt.get_property("TestPropertyTwo").datatype is None
+    assert rt.get_property("TestPropertyTwo").value is None
+
+
+def test_subref():
+    window = db.execute_query("FIND RECORD TestWindow", unique=True)
+    s = db.execute_query("SELECT name, TestWindow.TestHeight.value, "
+                         "TestWindow.TestHeight.unit FROM RECORD TestHouse")
+
+    assert len(s) == 1
+
+    row = s.get_property_values("name", "TestWindow")[0]
+    assert row[0] == "Buckingham Palace"
+    assert row[1] == window.id
+
+    row = s.get_property_values("name", ("TestWindow", "TestHeight"))[0]
+    assert row[0] == "Buckingham Palace"
+    assert row[1] == 20.5
+
+    row = s.get_property_values(
+        "name", ("TestWindow", "TestHeight", "unit"))[0]
+    assert row[0] == "Buckingham Palace"
+    assert row[1] == "ft"
+
+
+def test_subref_deep():
+    p = db.execute_query(
+        "SELECT name, Testdate, location, location.TestWindow.Testheight FROM "
+        "RECORD TestParty", unique=True)
+    row = p.get_property_values("name", "Testdate",
+                                ("location", "Testwindow", "Testheight"))
+    assert row == ("Diamond Jubilee of Elizabeth II", "2012-02-06", 20.5)
+
+
+def test_select_list():
+    guests = db.execute_query(
+        "FIND RECORD TestPerson WHICH IS REFERENCED BY TestParty")
+    s = db.execute_query("SELECT guests FROM RECORD TestParty", unique=True)
+
+    column = s.get_property_values("guests")[0]
+    assert len(column) == len(guests)
+
+    for eid in [e.id for e in guests]:
+        assert eid in column
+
+
+def test_select_unit():
+    s = db.execute_query("SELECT unit FROM RECORD TestHouse", unique=True)
+    column = s.get_property_values("unit")
+    assert column == (None,)
+
+    s = db.execute_query("SELECT unit FROM PROPERTY TestHeight", unique=True)
+    column = s.get_property_values("unit")
+    assert column == ("ft",)
+
+    s = db.execute_query("SELECT TestWindow.TestHeight.unit FROM "
+                         "RECORD TestHouse", unique=True)
+    column = s.get_property_values(("TestWindow", "TestHeight", "unit"))
+    assert column == ("ft",)
+
+    s = db.execute_query("SELECT TestHeight.unit.TestWindow FROM "
+                         "RECORD TestWindow", unique=True)
+    column = s.get_property_values(("TestHeight", "unit", "TestWindow"))
+    assert column == (None,)
+
+
+def test_select_description():
+    s = db.execute_query("SELECT description FROM RECORD TestPerson")
+    column = s.get_property_values("description")
+    assert column == [(None,), (None,), (None,), (None,)]
+
+    s = db.execute_query("SELECT description"
+                         "FROM RECORD TestHouse", unique=True)
+    column = s.get_property_values(("description"))
+    assert column == ("A rather large house",)
+
+    s = db.execute_query("SELECT location.description"
+                         "FROM RECORD TestParty", unique=True)
+    column = s.get_property_values(("location", "description"))
+    assert column == ("A rather large house",)
+
+    s = db.execute_query("SELECT TestHeight.description FROM "
+                         "RECORD TestWindow", unique=True)
+    column = s.get_property_values(("TestHeight", "description"))
+    assert column == ('TestHeightDesc',)
+
+    s = db.execute_query("SELECT TestWindow.TestHeight.description FROM "
+                         "RECORD TestHouse", unique=True)
+    column = s.get_property_values(("TestWindow", "TestHeight", "description"))
+    assert column == ('TestHeightDesc',)
+
+    s = db.execute_query("SELECT TestHeight.description.TestWindow FROM "
+                         "RECORD TestWindow", unique=True)
+    column = s.get_property_values(("TestHeight", "description", "TestWindow"))
+    assert column == (None,)
+
+
+def test_select_id():
+    house_id = db.execute_query("FIND RECORD TestHouse", unique=True).id
+    s = db.execute_query("SELECT id FROM RECORD TestHouse", unique=True)
+    column = s.get_property_values("id")
+    assert column == (house_id,)
+
+    s = db.execute_query(
+        "SELECT location.id FROM RECORD TestHouse",
+        unique=True)
+    column = s.get_property_values("id")
+    assert column == (house_id,)
+
+    height_id = db.execute_query("FIND PROPERTY TestHeight", unique=True).id
+    s = db.execute_query("SELECT id FROM PROPERTY TestHeight", unique=True)
+    column = s.get_property_values("id")
+    assert column == (height_id,)
+
+    s = db.execute_query("SELECT TestWindow.TestHeight.id FROM "
+                         "RECORD TestHouse", unique=True)
+    column = s.get_property_values(("TestWindow", "TestHeight", "id"))
+    assert column == (height_id,)
+
+    s = db.execute_query("SELECT TestHeight.id.TestWindow FROM "
+                         "RECORD TestWindow", unique=True)
+    column = s.get_property_values(("TestHeight", "id", "TestWindow"))
+    assert column == (None,)
+
+
+def test_select_name():
+    s = db.execute_query("SELECT name FROM RECORD TestHouse", unique=True)
+    column = s.get_property_values("name")
+    assert column == ("Buckingham Palace",)
+
+    s = db.execute_query("SELECT location.name FROM RECORD TestHouse",
+                         unique=True)
+    column = s.get_property_values("name")
+    assert column == ("Buckingham Palace",)
+
+    s = db.execute_query("SELECT name FROM PROPERTY TestHeight", unique=True)
+    column = s.get_property_values("name")
+    assert column == ("TestHeight",)
+
+    s = db.execute_query("SELECT TestWindow.TestHeight.name FROM "
+                         "RECORD TestHouse", unique=True)
+    column = s.get_property_values(("TestWindow", "TestHeight", "name"))
+    assert column == ("TestHeight",)
+
+    s = db.execute_query("SELECT TestHeight.name.TestWindow FROM "
+                         "RECORD TestWindow", unique=True)
+    column = s.get_property_values(("TestHeight", "name", "TestWindow"))
+    assert column == (None,)