diff --git a/tests/strategies/transformation/conftest.py b/tests/strategies/transformation/conftest.py
new file mode 100644
index 00000000..563a7447
--- /dev/null
+++ b/tests/strategies/transformation/conftest.py
@@ -0,0 +1,11 @@
+"""Pytest fixtures for transformation strategy tests."""
+
+from __future__ import annotations
+
+import pytest
+
+
+@pytest.fixture
+def default_rabbitmq_broker_image() -> str:
+    """Pin RabbitMQ to 3.x to avoid RabbitMQ 4.x removing transient_nonexcl_queues."""
+    return "rabbitmq:3"