diff --git a/hindsight-api-slim/tests/conftest.py b/hindsight-api-slim/tests/conftest.py
index 8d0c64a8..d051849b 100644
--- a/hindsight-api-slim/tests/conftest.py
+++ b/hindsight-api-slim/tests/conftest.py
@@ -17,7 +17,7 @@ from hindsight_api.pg0 import EmbeddedPostgres
 
 # Default pg0 instance configuration for tests
 DEFAULT_PG0_INSTANCE_NAME = "hindsight-test"
-DEFAULT_PG0_PORT = 5556
+DEFAULT_PG0_PORT = None
 
 
 # Load environment variables from .env at the start of test session