diff --git a/.github/workflows/R-CMD-check.yaml b/.github/workflows/R-CMD-check.yaml
index e2fe66f5..5b2db711 100644
--- a/.github/workflows/R-CMD-check.yaml
+++ b/.github/workflows/R-CMD-check.yaml
@@ -74,7 +74,6 @@ jobs:
           } else {
             cmdstanr::install_cmdstan(cores = 2)
           }
-          cmdstanr::install_cmdstan(cores = 2)
         shell: Rscript {0}
 
       - name: Session info