diff --git a/.github/workflows/check.yaml b/.github/workflows/check.yaml
index a41a03bb..d1b85d9a 100644
--- a/.github/workflows/check.yaml
+++ b/.github/workflows/check.yaml
@@ -24,8 +24,6 @@ jobs:
           - {os: ubuntu-latest,   r: 'release'}
           - {os: ubuntu-latest,   r: 'oldrel'}
           - {os: ubuntu-latest,   r: '4.1.3'}
-          - {os: ubuntu-latest,   r: '4.0.5'}
-          - {os: ubuntu-latest,   r: '3.6.0'}
 
     runs-on: ${{ matrix.os }}