diff --git a/.github/workflows/R_CMD_check_Hades.yaml b/.github/workflows/R_CMD_check_Hades.yaml
index e0819273..3c0aefe7 100644
--- a/.github/workflows/R_CMD_check_Hades.yaml
+++ b/.github/workflows/R_CMD_check_Hades.yaml
@@ -20,8 +20,6 @@ jobs:
       fail-fast: false
       matrix:
         config:
-          - {os: windows-latest, r: 'release'}
-          - {os: macOS-latest, r: 'release'}
           - {os: ubuntu-20.04, r: 'release', rspm: "https://packagemanager.rstudio.com/cran/__linux__/focal/latest"}
 
     env: