diff --git a/.github/workflows/R-CMD-check.yaml b/.github/workflows/R-CMD-check.yaml
index 08fa16a25..3dfa52634 100644
--- a/.github/workflows/R-CMD-check.yaml
+++ b/.github/workflows/R-CMD-check.yaml
@@ -44,6 +44,10 @@ jobs:
           - { os: ubuntu-, os-version: 18.04,   r: 'devel',   rspm: "https://packagemanager.rstudio.com/cran/__linux__/bionic/latest", http-user-agent: "R/4.0.0 (ubuntu-18.04) R (4.0.0 x86_64-pc-linux-gnu x86_64 linux-gnu) on GitHub Actions" }
           - { os: ubuntu-, os-version: 18.04,   r: 'oldrel',  rspm: "https://packagemanager.rstudio.com/cran/__linux__/bionic/latest" }
 
+          # Begin custom: R 3.6
+          - {os: ubuntu-, os-version: 18.04,   r: '3.6',     rspm: "https://packagemanager.rstudio.com/cran/__linux__/bionic/latest"}
+          # End custom: R 3.6
+
           # Begin custom: R 3.5
           - {os: ubuntu-, os-version: 18.04,   r: '3.5',     rspm: "https://packagemanager.rstudio.com/cran/__linux__/bionic/latest"}
           # End custom: R 3.5