diff --git a/.github/workflows/msbuild.yml b/.github/workflows/msbuild.yml
index 46461c61c..1dcf6c5ae 100644
--- a/.github/workflows/msbuild.yml
+++ b/.github/workflows/msbuild.yml
@@ -7,7 +7,7 @@ name: MSBuild
 
 on:
   push:
-    branches: [ "master" ]
+    branches: [ "master", "iteration21" ]
   pull_request:
     branches: [ "master" ]