diff --git a/.docker/docker-compose.yml b/.docker/docker-compose.yml
index 61d455f43ec92974207ba0ae8aadf528e15dfcaa..798717baaf96a801e946211d1e6bfe6f463cad88 100644
--- a/.docker/docker-compose.yml
+++ b/.docker/docker-compose.yml
@@ -27,6 +27,8 @@ services:
       - "10080:10080"
     environment:
       DEBUG: 1
+      CAOSDB_CONFIG__CAOSDB_INTEGRATION_TEST_SUITE_KEY: "_CAOSDB_ADV_TEST_SUITE"
+
 
 networks:
   caosnet:
diff --git a/integrationtests/test_ex_import_xlsx.py b/integrationtests/test_ex_import_xlsx.py
index ae6d922a6bd41f3ac9eb3bab5809f7d50a9c974b..9a9a9a0669dcf987cb9e8fa3dbc0c3559470d355 100755
--- a/integrationtests/test_ex_import_xlsx.py
+++ b/integrationtests/test_ex_import_xlsx.py
@@ -26,9 +26,12 @@ Data is partly reused from the unit tests.
 import json
 import os
 import sys
+import pytest
 from datetime import datetime
 from pathlib import Path
 
+from linkahead.utils.register_tests import clear_database, set_test_key
+
 from openpyxl import load_workbook
 
 import linkahead as db
@@ -42,6 +45,7 @@ from utils import (  # noqa: E402, pylint: disable=wrong-import-position
     purge_from_json,
     )  # noqa: E402
 
+set_test_key("_CAOSDB_ADV_TEST_SUITE")
 
 def rfp(*pathcomponents):
     """
@@ -122,76 +126,62 @@ def _insert_multiple_refs_data():
     cont.insert()
 
 
-# def _fill_data():
-
-
-def setup_function(function):
+@pytest.fixture(autouse=True)
+def setup(clear_database):
     "Create needed test data"
-    try:
-        # Setup data structure
-        test_rt_0 = db.RecordType(name="Person", description="An observant human.")
-        test_prop_0 = db.Property(name="full_name", datatype=db.TEXT)
-        test_rt_0.add_property(test_prop_0)
-        test_rt_1 = db.RecordType(name="ObservationRecord")
-        test_prop_1 = db.Property(name="date", datatype=db.DATETIME)
-        test_prop_2 = db.Property(name="amount", datatype=db.INTEGER)
-        test_prop_3 = db.Property(name="observer", datatype=test_rt_0)
-        test_rt_1.add_property(test_prop_1).add_property(test_prop_2).add_property(test_prop_3)
-        test_rt_2 = db.RecordType(name="Conference")
-        test_prop_4 = db.Property(name="attendees", datatype=db.LIST(test_rt_0))
-        test_rt_2.add_property(test_prop_4)
-
-        # Setup data
-        test_person_0 = db.Record(name="Person 0").add_parent(test_rt_0).add_property(
-            test_prop_0, value="Their Name")
-        test_person_1 = db.Record(name="Person 1").add_parent(test_rt_0).add_property(
-            test_prop_0, value="Also Name")
-        test_person_2 = db.Record(name="Person 2").add_parent(test_rt_0).add_property(
-            test_prop_0, value="Third Name")
-        test_observation_0 = (db.Record().add_parent(test_rt_1)
-                              .add_property(test_prop_1, value="2025-01-01")
-                              .add_property(test_prop_2, value=5)
-                              .add_property(test_prop_3, value=test_person_1))
-        test_observation_1 = (db.Record().add_parent(test_rt_1)
-                              .add_property(test_prop_1, value="2025-02-02")
-                              .add_property(test_prop_2, value=3)
-                              .add_property(test_prop_3, value=test_person_0))
-        test_observation_2 = (db.Record().add_parent(test_rt_1)
-                              .add_property(test_prop_1, value="2025-03-03")
-                              .add_property(test_prop_2, value=12)
-                              .add_property(test_prop_3, value=test_person_0))
-        test_observation_3 = (db.Record().add_parent(test_rt_1)
-                              .add_property(test_prop_1, value="2025-04-04")
-                              .add_property(test_prop_2, value=0)
-                              .add_property(test_prop_3, value=test_person_2))
-        test_conference_0 = (db.Record(description="Only for Also").add_parent(test_rt_2)
-                             .add_property(test_prop_4, value=[test_person_1]))
-        test_conference_1 = (db.Record(name="Official Conf", description="For everyone")
-                             .add_parent(test_rt_2)
-                             .add_property(test_prop_4,
-                                           value=[test_person_0, test_person_1, test_person_2]))
-        testdata = [test_rt_0, test_rt_1, test_rt_2,
-                    test_prop_0, test_prop_1, test_prop_2,
-                    test_prop_3, test_prop_4,
-                    test_person_0, test_person_1, test_person_2,
-                    test_observation_0, test_observation_1, test_observation_2, test_observation_3,
-                    test_conference_0, test_conference_1]
-
-        # Insert
-        c = db.Container()
-        c.extend(testdata)
-        c.insert()
-    except Exception as setup_exc:
-        print(setup_exc)
-
-
-def teardown_function(function):
-    """Delete created test data"""
-    try:
-        db.execute_query("FIND ENTITY WITH ID > 99").delete()
-    except Exception as delete_exc:
-        print(delete_exc)
-
+    # Setup data structure
+    test_rt_0 = db.RecordType(name="Person", description="An observant human.")
+    test_prop_0 = db.Property(name="full_name", datatype=db.TEXT)
+    test_rt_0.add_property(test_prop_0)
+    test_rt_1 = db.RecordType(name="ObservationRecord")
+    test_prop_1 = db.Property(name="date", datatype=db.DATETIME)
+    test_prop_2 = db.Property(name="amount", datatype=db.INTEGER)
+    test_prop_3 = db.Property(name="observer", datatype=test_rt_0)
+    test_rt_1.add_property(test_prop_1).add_property(test_prop_2).add_property(test_prop_3)
+    test_rt_2 = db.RecordType(name="Conference")
+    test_prop_4 = db.Property(name="attendees", datatype=db.LIST(test_rt_0))
+    test_rt_2.add_property(test_prop_4)
+
+    # Setup data
+    test_person_0 = db.Record(name="Person 0").add_parent(test_rt_0).add_property(
+        test_prop_0, value="Their Name")
+    test_person_1 = db.Record(name="Person 1").add_parent(test_rt_0).add_property(
+        test_prop_0, value="Also Name")
+    test_person_2 = db.Record(name="Person 2").add_parent(test_rt_0).add_property(
+        test_prop_0, value="Third Name")
+    test_observation_0 = (db.Record().add_parent(test_rt_1)
+                            .add_property(test_prop_1, value="2025-01-01")
+                            .add_property(test_prop_2, value=5)
+                            .add_property(test_prop_3, value=test_person_1))
+    test_observation_1 = (db.Record().add_parent(test_rt_1)
+                            .add_property(test_prop_1, value="2025-02-02")
+                            .add_property(test_prop_2, value=3)
+                            .add_property(test_prop_3, value=test_person_0))
+    test_observation_2 = (db.Record().add_parent(test_rt_1)
+                            .add_property(test_prop_1, value="2025-03-03")
+                            .add_property(test_prop_2, value=12)
+                            .add_property(test_prop_3, value=test_person_0))
+    test_observation_3 = (db.Record().add_parent(test_rt_1)
+                            .add_property(test_prop_1, value="2025-04-04")
+                            .add_property(test_prop_2, value=0)
+                            .add_property(test_prop_3, value=test_person_2))
+    test_conference_0 = (db.Record(description="Only for Also").add_parent(test_rt_2)
+                            .add_property(test_prop_4, value=[test_person_1]))
+    test_conference_1 = (db.Record(name="Official Conf", description="For everyone")
+                            .add_parent(test_rt_2)
+                            .add_property(test_prop_4,
+                                        value=[test_person_0, test_person_1, test_person_2]))
+    testdata = [test_rt_0, test_rt_1, test_rt_2,
+                test_prop_0, test_prop_1, test_prop_2,
+                test_prop_3, test_prop_4,
+                test_person_0, test_person_1, test_person_2,
+                test_observation_0, test_observation_1, test_observation_2, test_observation_3,
+                test_conference_0, test_conference_1]
+
+    # Insert
+    c = db.Container()
+    c.extend(testdata)
+    c.insert()
 
 def test_successful_export():
     records = next(db.execute_query("FIND Record", page_length=50))
@@ -208,6 +198,10 @@ def test_successful_export():
 
 def test_export_list_refs(tmpdir):
     """Test the export to XLSX of list-valued references.
+
+    We retrieve all "Training" Records from LinkAhead and run `export_container_to_xlsx` on the
+    result. This shall create an XLSX template, a JSON schema, a filled JSON, and a filled XLSX.
+    All are checked against our expectation.
     """
     tmpdir = Path(tmpdir)
     # Setup database
@@ -230,15 +224,18 @@ def test_export_list_refs(tmpdir):
     with open(tmpdir/"schema.json", encoding="utf-8") as schema_f:
         schema_generated = json.load(schema_f)
 
-    training = schema_generated.get("properties", {}).get("Training")
-    assert training
-    assert len(schema_generated.get("properties", {})) == 1  # All top-level sheets?
-    for props in (training["properties"],
-                  training["properties"]["trainer"]["items"]["properties"],
-                  training["properties"]["participant"]["items"]["properties"],
-                  training["properties"]["Organisation"]["items"]["properties"],
-                  ):
-        assert "id" in props.keys()
+    try:
+        assert len(schema_generated["properties"]) == 1  # Only 'Training' should be top level
+        training = schema_generated["properties"]["Training"]
+        for props in (training["properties"],
+                      training["properties"]["trainer"]["items"]["properties"],
+                      training["properties"]["participant"]["items"]["properties"],
+                      training["properties"]["Organisation"]["items"]["properties"],
+                      ):
+            assert "id" in props.keys()
+    except KeyError:
+        print("It seems the generated JSON schema does not have the expected structure!")
+        raise
 
     # Check: XLSX template
     template_known_good = load_workbook(rfp("data", "multiple_refs_template.xlsx"))