diff --git a/mx-tester.yml b/mx-tester.yml
index a249b61a..1e903e89 100644
--- a/mx-tester.yml
+++ b/mx-tester.yml
@@ -6,7 +6,7 @@ up:
     # Wait until postgresql is ready
     - until psql postgres://mjolnir-tester:mjolnir-test@127.0.0.1:8083/mjolnir-test-db -c ""; do echo "Waiting for psql..."; sleep 1s; done
     # Launch the reverse proxy, listening for connections *only* on the local host.
-    - docker run --rm --network host --name mjolnir-test-reverse-proxy -p 127.0.0.1:8084:8084 -p 127.0.0.1:8085:8085 -p 127.0.0.1:8086:8086 -p 127.0.0.1:8081:8081 -v $MX_TEST_CWD/test/nginx.conf:/etc/nginx/nginx.conf:ro -d nginx
+    - docker run --rm --network host --name mjolnir-test-reverse-proxy -v $MX_TEST_CWD/test/nginx.conf:/etc/nginx/nginx.conf:ro -d nginx
     - yarn install
     - npx ts-node src/appservice/cli.ts -r -u "http://host.docker.internal:9000"
     - cp mjolnir-registration.yaml $MX_TEST_SYNAPSE_DIR/data/