diff --git a/tests/conftest.py b/tests/conftest.py
index ab921dd..4e741cd 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -10,6 +10,8 @@
 
 import pytest
 
+from too.mock import create_mock_too_catalogue
+
 
 DBNAME: str = "sdss5db_too_test"
 
@@ -25,3 +27,10 @@ def sdss5db():
     yield
 
     sdss5db.database.close()
+
+
+@pytest.fixture(scope="session")
+def too_mock():
+    sample = create_mock_too_catalogue()
+
+    yield sample
diff --git a/tests/test_mock.py b/tests/test_mock.py
new file mode 100644
index 0000000..9e2863b
--- /dev/null
+++ b/tests/test_mock.py
@@ -0,0 +1,16 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+#
+# @Author: José Sánchez-Gallego (gallegoj@uw.edu)
+# @Date: 2024-02-11
+# @Filename: test_mock.py
+# @License: BSD 3-clause (http://www.opensource.org/licenses/BSD-3-Clause)
+
+from __future__ import annotations
+
+import polars
+
+
+def test_mock_sample(too_mock: polars.DataFrame):
+    assert isinstance(too_mock, polars.DataFrame)
+    assert too_mock.height > 500000