diff --git a/tests/test_tickets_300.py b/tests/test_tickets_300.py
index 1b36d343d5b84f3223ad93fc0366ba3535aa70aa..36fa9a63a238a0fd88cdc3a240fecc22ad64a8ed 100644
--- a/tests/test_tickets_300.py
+++ b/tests/test_tickets_300.py
@@ -5,6 +5,8 @@
 #
 # Copyright (C) 2018 Research Group Biomedical Physics,
 # Max-Planck-Institute for Dynamics and Self-Organization Göttingen
+# Copyright (C) 2020 Indiscale GmbH <info@indiscale.com>
+# Copyright (C) 2020 Florian Spreckelsen <f.spreckelsen@indiscale.com>
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU Affero General Public License as
@@ -25,12 +27,12 @@
 
 from __future__ import unicode_literals, print_function
 import caosdb as db
-from nose.tools import with_setup, assert_raises as raiz, assert_equal as eq
+from pytest import raises
 
 
 def _delete_test_entities():
     try:
-        db.execute_query("FIND Entity WITH id >= 100").delete()
+        db.execute_query("FIND Test*").delete()
     except Exception as e:
         print(e)
 
@@ -43,14 +45,23 @@ def teardown_module():
     _delete_test_entities()
 
 
-@with_setup(_delete_test_entities, _delete_test_entities)
+def setup():
+    setup_module()
+
+
+def teardown():
+    teardown_module()
+
+
 def test_ticket_350_insert_with_invalid_ref():
     c = db.Container()
-    e = db.Entity(name="SomeName")
-    rt1 = db.RecordType(name="RT1")
-    rt2 = db.RecordType(name="RT2").add_property(name="RT1", value="SomeName")
+    e = db.Entity(name="TestEnt")
+    rt1 = db.RecordType(name="TestRT1")
+    rt2 = db.RecordType(name="TestRT2").add_property(
+        name="TestRT1", value="TestEnt")
     c.extend([e, rt1, rt2])
-    with raiz(db.TransactionError) as cm:
+    with raises(db.TransactionError) as cm:
         c.insert()
-    eq(cm.exception.errors[0].msg, "There is no such role 'Entity'.")
-    eq(cm.exception.errors[1].msg, "Entity has unqualified properties.")
+    assert any(
+        [x.msg == "There is no such role 'Entity'." for x in cm.value.get_errors()])
+    assert cm.value.has_error(db.UnqualifiedPropertiesError)