diff --git a/tests/test_issues_server.py b/tests/test_issues_server.py
index 9a54058c6eee7bcdb751ff764e5945a92506d573..7762838c469f17b098ef7ac3e59c6ffc1b55ee42 100644
--- a/tests/test_issues_server.py
+++ b/tests/test_issues_server.py
@@ -1402,3 +1402,33 @@ See https://gitlab.com/caosdb/caosdb-server/-/issues/220"""
     assert res_3.parents[0].name == rectype.name, \
         "The name of the record's parent should be up-to-date."
     assert query.cached is False, "Query after name change of parent should not be cached."
+
+
+@pytest.mark.xfail(reason="Needs fix for keeping datatype, "
+                   "see https://gitlab.indiscale.com/caosdb/src/caosdb-server/-/issues/106")
+def test_indiscale_106():
+    """Datatype of old properties is changed.
+
+See https://gitlab.indiscale.com/caosdb/src/caosdb-server/-/issues/106
+    """
+
+    # Create TEXT Property
+    p = db.Property("prop", datatype=db.TEXT)
+    p.insert()
+
+    # Create Record using this Property
+    db.RecordType("RT").insert()
+    r = db.Record(name="rec")
+    r.add_parent("RT")
+    r.add_property(id=p.id, value="This is a TEXT property")
+    r.insert()
+
+    print(db.Record(id=r.id).retrieve())
+    assert db.Record(id=r.id).retrieve().get_property("prop").datatype == db.TEXT
+
+    # Changing Property's datatype to REFERENCE
+    p.datatype = db.REFERENCE
+    p.update()
+
+    # Existing Property should still be reported as TEXT
+    assert db.Record(id=r.id).retrieve().get_property("prop").datatype == db.TEXT