diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a5738adb..1b0e39c3 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,3 +15,5 @@ jobs:
     needs: Spec
     uses: "puppetlabs/cat-github-actions/.github/workflows/module_acceptance.yml@main"
     secrets: "inherit"
+    with:
+      runs_on: "ubuntu-20.04"
diff --git a/.github/workflows/nightly.yml b/.github/workflows/nightly.yml
index 1b06c471..aaa4967f 100644
--- a/.github/workflows/nightly.yml
+++ b/.github/workflows/nightly.yml
@@ -14,3 +14,5 @@ jobs:
     needs: Spec
     uses: "puppetlabs/cat-github-actions/.github/workflows/module_acceptance.yml@main"
     secrets: "inherit"
+    with:
+      runs_on: "ubuntu-20.04"