Improve error message when TestCase functions use a parametrized fixture

Fix #2535

1 files changed, 13 insertions, 0 deletions

diff --git a/testing/example_scripts/unittest/test_parametrized_fixture_error_message.py b/testing/example_scripts/unittest/test_parametrized_fixture_error_message.py
new file mode 100644
index 000000000..0b85bef3a
--- /dev/null
+++ b/testing/example_scripts/unittest/test_parametrized_fixture_error_message.py
@@ -0,0 +1,13 @@
+import pytest
+import unittest
+
+
+@pytest.fixture(params=[1, 2])
+def two(request):
+    return request.param
+
+
+@pytest.mark.usefixtures("two")
+class TestSomethingElse(unittest.TestCase):
+    def test_two(self):
+        pass