diff --git a/.github/workflows/R-CMD-check.yaml b/.github/workflows/R-CMD-check.yaml
index 8d7839f..96f85a7 100644
--- a/.github/workflows/R-CMD-check.yaml
+++ b/.github/workflows/R-CMD-check.yaml
@@ -20,9 +20,9 @@ jobs:
         config:
           - { os: macos-latest, r: "release" }
           - { os: windows-latest, r: "release" }
-          - { os: ubuntu-latest, r: "devel", http-user-agent: "release" }
+          - { os: ubuntu-latest, r: "oldrel-1", http-user-agent: "release" }
           #- { os: ubuntu-latest, r: "release" }
-          #- { os: ubuntu-latest, r: "oldrel-1" }
+          #- { os: ubuntu-latest, r: "devel" }
 
     env:
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}