diff --git a/.github/workflows/test-build-processes.yml b/.github/workflows/test-build-processes.yml
index 6a03dccf237ed..23a188c94bb47 100644
--- a/.github/workflows/test-build-processes.yml
+++ b/.github/workflows/test-build-processes.yml
@@ -76,7 +76,7 @@ jobs:
   # Tests the Gutenberg plugin build process on multiple operating systems when run within a wordpress-develop checkout.
   test-gutenberg-build-process:
     name: Gutenberg running from ${{ matrix.directory }}
-    uses: WordPress/wordpress-develop/.github/workflows/reusable-test-gutenberg-build-process.yml@trunk
+    uses: desrosj/wordpress-develop/.github/workflows/reusable-test-gutenberg-build-process.yml@add/input-for-pinning-gutenberg
     permissions:
       contents: read
     if: ${{ github.repository == 'WordPress/wordpress-develop' || github.event_name == 'pull_request' }}
@@ -88,6 +88,7 @@ jobs:
     with:
       os: ${{ matrix.os }}
       directory: ${{ matrix.directory }}
+      gutenberg-branch: 'wp/6.5'
 
   # Tests the Gutenberg plugin build process on MacOS when run within a wordpress-develop checkout.
   #
@@ -99,7 +100,7 @@ jobs:
   # See https://docs.github.com/en/actions/learn-github-actions/contexts#context-availability.
   test-gutenberg-build-process-macos:
     name: Gutenberg running from ${{ matrix.directory }}
-    uses: WordPress/wordpress-develop/.github/workflows/reusable-test-gutenberg-build-process.yml@trunk
+    uses: desrosj/wordpress-develop/.github/workflows/reusable-test-gutenberg-build-process.yml@add/input-for-pinning-gutenberg
     permissions:
       contents: read
     if: ${{ github.repository == 'WordPress/wordpress-develop' }}
@@ -111,6 +112,7 @@ jobs:
     with:
       os: ${{ matrix.os }}
       directory: ${{ matrix.directory }}
+      gutenberg-branch: 'wp/6.5'
 
   # Uploads the PR number as an artifact for the Pull Request Commenting workflow to download and then
   # leave a comment detailing how to test the PR within WordPress Playground.