diff --git a/.github/workflows/build_linux.yml b/.github/workflows/build_linux.yml
index 25c80276..10c7f404 100644
--- a/.github/workflows/build_linux.yml
+++ b/.github/workflows/build_linux.yml
@@ -26,7 +26,7 @@ jobs:
           python3 startbroker.py -c localhost_testing.conf &
       - name: Start test proxy
         run: |
-          python3 test/mqttsas.py &
+          python3 test/mqttsas.py localhost 1883 1885 &
       - name: run tests
         run: |
           cd build.paho