diff --git a/.github/workflows/R-CMD-check.yaml b/.github/workflows/R-CMD-check.yaml
index 3f0a9d1..b5e3d98 100644
--- a/.github/workflows/R-CMD-check.yaml
+++ b/.github/workflows/R-CMD-check.yaml
@@ -22,16 +22,17 @@ jobs:
       fail-fast: false
       matrix:
         config:
-          - {os: ubuntu-latest,   r: 'devel', http-user-agent: 'release'}
           - {os: ubuntu-latest,   r: 'release'}
+          - {os: macos-latest,    r: 'release'}
+          - {os: windows-latest,  r: 'release'}
+          - {os: ubuntu-latest,   r: 'devel', http-user-agent: 'release'}
+          - {os: fedora-clang,    r: 'devel'}
+          - {os: debian-gcc,      r: 'devel'}
+          - {os: debian-clang,    r: 'devel'}
           - {os: ubuntu-latest,   r: 'oldrel-1'}
           - {os: ubuntu-latest,   r: 'oldrel-2'}
           - {os: ubuntu-latest,   r: 'oldrel-3'}
           - {os: ubuntu-latest,   r: 'oldrel-4'}
-          - {os: ubuntu-latest,   r: 'devel-ubsan-clang'}
-          - {os: ubuntu-latest,   r: 'devel-san'}
-          - {os: macos-latest,    r: 'release'}
-          - {os: windows-latest,  r: 'release'}
           # Use 3.6 to trigger usage of RTools35
           - {os: windows-latest,  r: '3.6'}
           # use 4.1 to check with rtools40's older compiler