diff --git a/.github/workflows/antsibull-build.yml b/.github/workflows/antsibull-build.yml
index 32364217..6f7c3e90 100644
--- a/.github/workflows/antsibull-build.yml
+++ b/.github/workflows/antsibull-build.yml
@@ -31,28 +31,28 @@ jobs:
             antsibull_changelog_ref: 0.24.0
             antsibull_core_ref: stable-2
             antsibull_docutils_ref: 1.0.0  # isn't used by antsibull-changelog 0.24.0
-            antsibull_fileutils_ref: main
+            antsibull_fileutils_ref: pull/1/head
           - name: Ansible 9
             options: '-e antsibull_ansible_version=9.99.0'
             python: '3.11'
             antsibull_changelog_ref: main
             antsibull_core_ref: stable-2
             antsibull_docutils_ref: main
-            antsibull_fileutils_ref: main
+            antsibull_fileutils_ref: pull/1/head
           - name: Ansible 10
             options: '-e antsibull_ansible_version=10.99.0'
             python: '3.12'
             antsibull_changelog_ref: main
             antsibull_core_ref: main
             antsibull_docutils_ref: main
-            antsibull_fileutils_ref: main
+            antsibull_fileutils_ref: pull/1/head
           - name: Ansible 11
             options: '-e antsibull_ansible_version=11.99.0'
             python: '3.12'
             antsibull_changelog_ref: main
             antsibull_core_ref: main
             antsibull_docutils_ref: main
-            antsibull_fileutils_ref: main
+            antsibull_fileutils_ref: pull/1/head
 
     steps:
       - name: Check out antsibull
diff --git a/.github/workflows/nox.yml b/.github/workflows/nox.yml
index c0d22069..00cf7187 100644
--- a/.github/workflows/nox.yml
+++ b/.github/workflows/nox.yml
@@ -79,6 +79,7 @@ jobs:
         with:
           repository: ansible-community/antsibull-fileutils
           path: antsibull-fileutils
+          ref: pull/1/head
       - name: Install extra packages
         if: "matrix.packages != ''"
         run: |