diff --git a/.github/workflows/build_installer.yml b/.github/workflows/build_installer.yml
index f31a14b41..4a6d41cfc 100644
--- a/.github/workflows/build_installer.yml
+++ b/.github/workflows/build_installer.yml
@@ -4,6 +4,11 @@ on:
   workflow_dispatch: {}
   push:
 
+  pull_request:
+      branches:
+      - RB-2.5
+      - RB-2.6
+
 env:
   NATRON_BUILD_WORKSPACE: 'D:/nbw'
   CI: 'True'