diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 730a9b1..08d4ff5 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -78,7 +78,7 @@ jobs:
       artifact-files: 'b2bua.log'
     strategy:
       matrix:
-        mm-branch: ['master', 'PRACK']
+        mm-branch: ['wip', 'PRACK']
         rtppc-type: ['unix', 'cunix', 'udp', 'udp6', 'tcp', 'tcp6']
         python-version: ['3.9', '3.10', '3.11', '3.12', '3.13-dev']
 
@@ -87,6 +87,7 @@ jobs:
     uses: ./.github/workflows/.main.yml
     with:
       mm-type: 'go-b2bua'
+      mm-branch: 'wip'
       rtppc-type: ${{ matrix.rtppc-type }}
       artifact-files: 'b2bua.log'
     strategy: