diff --git a/.github/workflows/R-CMD-check.yaml b/.github/workflows/R-CMD-check.yaml
index 02ea97a..470becb 100644
--- a/.github/workflows/R-CMD-check.yaml
+++ b/.github/workflows/R-CMD-check.yaml
@@ -21,10 +21,10 @@ jobs:
       matrix:
         config:
           - {os: macOS-latest,   r: 'devel', continue-on-error: true }
-          - {os: macOS-latest,   r: 'release', continue-on-error: false}
-          - {os: windows-latest, r: 'release', continue-on-error: false}
-          - {os: ubuntu-16.04,   r: 'release', rspm: "https://packagemanager.rstudio.com/cran/__linux__/xenial/latest", continue-on-error: false}
-          - {os: ubuntu-16.04,   r: 'oldrel',  rspm: "https://packagemanager.rstudio.com/cran/__linux__/xenial/latest", continue-on-error: false}
+          - {os: macOS-latest,   r: 'release', continue-on-error: false }
+          - {os: windows-latest, r: 'release', continue-on-error: false }
+          - {os: ubuntu-16.04,   r: 'release', rspm: "https://packagemanager.rstudio.com/cran/__linux__/xenial/latest", continue-on-error: false }
+          - {os: ubuntu-16.04,   r: 'oldrel',  rspm: "https://packagemanager.rstudio.com/cran/__linux__/xenial/latest", continue-on-error: false }
           - {os: ubuntu-16.04,   r: '3.5',     rspm: "https://packagemanager.rstudio.com/cran/__linux__/xenial/latest", continue-on-error: false }
           - {os: ubuntu-16.04,   r: '3.4',     rspm: "https://packagemanager.rstudio.com/cran/__linux__/xenial/latest", continue-on-error: true }
           - {os: ubuntu-16.04,   r: '3.3',     rspm: "https://packagemanager.rstudio.com/cran/__linux__/xenial/latest", continue-on-error: true }