diff --git a/docker-compose.yaml b/docker-compose.yaml
index 904d6f4..7c93ea8 100644
--- a/docker-compose.yaml
+++ b/docker-compose.yaml
@@ -8,7 +8,7 @@ services:
       POSTGRESQL_DATABASE: tycho_indexer_0
       POSTGRESQL_USERNAME: postgres
     ports:
-      - "5432:5432"
+      - "5431:5432"
     volumes:
       - postgres_data:/var/lib/postgresql/data
 volumes:
diff --git a/testing/runner.py b/testing/runner.py
index deab2e3..195c322 100644
--- a/testing/runner.py
+++ b/testing/runner.py
@@ -61,7 +61,7 @@ class TestRunner:
                 print(f"❗️ {test['name']} failed: {result.message}")
 
             self.tycho_runner.empty_database(
-                "postgres://postgres:mypassword@localhost:5432"
+                "postgres://postgres:mypassword@localhost:5431"
             )
 
     def validate_state(self, expected_state: dict, stop_block: int) -> TestResult: