diff --git a/.github/workflows/reusable-test-gutenberg-build-process.yml b/.github/workflows/reusable-test-gutenberg-build-process.yml
index a538daeed6779..f20f726ca5905 100644
--- a/.github/workflows/reusable-test-gutenberg-build-process.yml
+++ b/.github/workflows/reusable-test-gutenberg-build-process.yml
@@ -16,6 +16,11 @@ on:
         required: false
         type: 'string'
         default: 'src'
+      gutenberg-branch:
+        description: 'The branch in the Gutenberg repository that should be tested against.'
+        required: false
+        type: 'string'
+        default: ''
 
 env:
   GUTENBERG_DIRECTORY: ${{ inputs.directory == 'build' && 'build' || 'src' }}/wp-content/plugins/gutenberg
@@ -58,6 +63,7 @@ jobs:
         uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           repository: 'WordPress/gutenberg'
+          ref: ${{ inputs.gutenberg-branch && inputs.gutenberg-branch || 'trunk' }}
           path: ${{ env.GUTENBERG_DIRECTORY }}
           show-progress: ${{ runner.debug == '1' && 'true' || 'false' }}
           persist-credentials: false