diff --git a/.github/workflows/R-CMD-check.yaml b/.github/workflows/R-CMD-check.yaml
index fea535cb8..502580dc6 100644
--- a/.github/workflows/R-CMD-check.yaml
+++ b/.github/workflows/R-CMD-check.yaml
@@ -25,15 +25,15 @@ jobs:
       fail-fast: false
       matrix:
         config:
-          - {os: macOS-latest,   r: 'release'}
-          - {os: windows-latest, r: 'release'}
-          - {os: windows-latest, r: '3.6'}
-          - {os: ubuntu-20.04,   r: 'devel', http-user-agent: 'release'}
-          - {os: ubuntu-20.04,   r: 'release'}
-          - {os: ubuntu-20.04,   r: 'oldrel-1'}
-          - {os: ubuntu-20.04,   r: 'oldrel-2'}
-          - {os: ubuntu-20.04,   r: 'oldrel-3'}
-          - {os: ubuntu-20.04,   r: 'oldrel-4'}
+          - { os: macOS-latest, r: "release" }
+          - { os: windows-latest, r: "release" }
+          # - {os: windows-latest, r: '3.6'} # Difficulty building packages on windows w/ R 3.6
+          - { os: ubuntu-20.04, r: "devel", http-user-agent: "release" }
+          - { os: ubuntu-20.04, r: "release" }
+          - { os: ubuntu-20.04, r: "oldrel-1" }
+          - { os: ubuntu-20.04, r: "oldrel-2" }
+          - { os: ubuntu-20.04, r: "oldrel-3" }
+          - { os: ubuntu-20.04, r: "oldrel-4" }
 
     env:
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}