diff --git a/.github/workflows/R-CMD-check.yaml b/.github/workflows/R-CMD-check.yaml
index 87e20eb..9d93732 100644
--- a/.github/workflows/R-CMD-check.yaml
+++ b/.github/workflows/R-CMD-check.yaml
@@ -106,10 +106,14 @@ jobs:
           remotes::install_github("SticsRPacks/SticsRFiles@main", dependencies = FALSE, upgrade = "never")
         shell: Rscript {0}
 
-      #- name: Install testthat 3.1.8
-      #  run: Rscript -e "install.packages('https://cran.r-project.org/src/contrib/Archive/testthat/testthat_3.1.8.tar.gz', repos = NULL, type = 'source')"
-      - name: Install testthat
-        run: Rscript -e "install.packages('testthat')"
+      - name: Install testthat 3.1.8
+
+      # Rscript -e "install.packages('https://cran.r-project.org/src/contrib/Archive/testthat/testthat_3.1.8.tar.gz', repos = NULL, type = 'source')"
+        run: |
+          Rscript -e "install.packages('ellipsis')"
+          Rscript -e 'remotes::install_version("testthat", version = "3.1.8")'
+      #- name: Install testthat
+      #  run: Rscript -e "install.packages('testthat')"
         
       - name: Check
         env: