diff --git a/.github/workflows/R-CMD-check.yaml b/.github/workflows/R-CMD-check.yaml
index fe9ce9d7..9a8e7459 100644
--- a/.github/workflows/R-CMD-check.yaml
+++ b/.github/workflows/R-CMD-check.yaml
@@ -25,11 +25,13 @@ jobs:
           - {os: windows-latest, nosuggests: false, r: 'devel'}
           - {os: windows-latest, nosuggests: false, r: 'release'}
           - {os: windows-latest, nosuggests: true,  r: 'release'}
-          - {os: windows-latest, nosuggests: false, r: 'oldrel'}
+          - {os: windows-latest, nosuggests: false, r: 'oldrel/1'}
+          - {os: windows-latest, nosuggests: false, r: 'oldrel/2'}
           - {os: ubuntu-20.04,   nosuggests: false, r: 'devel'}
           - {os: ubuntu-20.04,   nosuggests: false, r: 'release'}
           - {os: ubuntu-20.04,   nosuggests: true,  r: 'release'}
-          - {os: ubuntu-20.04,   nosuggests: false, r: 'oldrel'}
+          - {os: ubuntu-20.04,   nosuggests: false, r: 'oldrel/1'}
+          - {os: ubuntu-20.04,   nosuggests: false, r: 'oldrel/2'}
 
     env:
       _R_CHECK_DEPENDS_ONLY_: ${{ matrix.config.nosuggests }}