diff --git a/.github/workflows/R-CMD-check.yaml b/.github/workflows/R-CMD-check.yaml
index afa68b6..7e33427 100644
--- a/.github/workflows/R-CMD-check.yaml
+++ b/.github/workflows/R-CMD-check.yaml
@@ -33,7 +33,7 @@ jobs:
       R_REMOTES_NO_ERRORS_FROM_WARNINGS: 'true'
       R_COMPILE_AND_INSTALL_PACKAGES: 'never'
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
-      CUDA_VISIBLE_DEVICES: ""
+      CUDA_VISIBLE_DEVICES: 'FALSE'
       RETICULATE_AUTOCONFIGURE: 'FALSE'
 
     steps:
@@ -83,6 +83,7 @@ jobs:
             any::remotes
             any::reticulate
             any::devtools
+            any::VGAM
 
       # - name: Cache Python environment
       #   if: runner.os == 'Linux' || runner.os == 'macOS'
diff --git a/.github/workflows/test-coverage.yaml b/.github/workflows/test-coverage.yaml
index 09c9f53..97a5bed 100644
--- a/.github/workflows/test-coverage.yaml
+++ b/.github/workflows/test-coverage.yaml
@@ -17,7 +17,7 @@ jobs:
       R_REMOTES_NO_ERRORS_FROM_WARNINGS: 'true'
       R_COMPILE_AND_INSTALL_PACKAGES: 'never'
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
-      CUDA_VISIBLE_DEVICES: ""
+      CUDA_VISIBLE_DEVICES: 'FALSE'
       RETICULATE_AUTOCONFIGURE: 'FALSE'
 
     steps:
@@ -65,6 +65,7 @@ jobs:
             any::rcmdcheck
             any::sessioninfo
             any::devtools
+            any::VGAM
 
       # - name: Cache Python environment
       #   if: runner.os == 'Linux' || runner.os == 'macOS'
diff --git a/DESCRIPTION b/DESCRIPTION
index df015f0..b4bc26e 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -26,6 +26,7 @@ Imports:
     tensorflow (>= 1.14.0)
 Suggests:
     devtools,
+    VGAM,
     covr,
     knitr,
     rmarkdown,