diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2fcff9bd..c38e3294 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -9,7 +9,7 @@ on:
 jobs:
   linux_tests:
     name: Linux, Puppet ${{ matrix.cfg.puppet_version }}, Ruby ${{ matrix.cfg.ruby }}
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     strategy:
       matrix:
         cfg:
diff --git a/.github/workflows/nightly.yml b/.github/workflows/nightly.yml
index f812e9d7..c35eb87c 100644
--- a/.github/workflows/nightly.yml
+++ b/.github/workflows/nightly.yml
@@ -7,7 +7,7 @@ on:
 jobs:
   linux_tests:
     name: Linux, Puppet ${{ matrix.cfg.puppet_version }}, Ruby ${{ matrix.cfg.ruby }}
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     strategy:
       matrix:
         cfg: