diff --git a/.Rbuildignore b/.Rbuildignore
index 23fefec..51cbb5f 100644
--- a/.Rbuildignore
+++ b/.Rbuildignore
@@ -2,4 +2,3 @@
 ^\.Rproj\.user$
 ^LICENSE\.md$
 .github/*
-ddl/*
diff --git a/.github/workflows/R_CMD_check.yaml b/.github/workflows/R_CMD_check.yaml
index e1985ec..53cab39 100644
--- a/.github/workflows/R_CMD_check.yaml
+++ b/.github/workflows/R_CMD_check.yaml
@@ -21,10 +21,9 @@ jobs:
       fail-fast: true
       matrix:
         config:
-          #- {os: windows-latest, r: 'release'}  # Does not appear to have Java 32-bit, hence the --no-multiarch
+          - {os: windows-latest, r: 'release'}  # Does not appear to have Java 32-bit, hence the --no-multiarch
           - {os: macOS-latest, r: 'release'}
-          #- {os: ubuntu-20.04, r: 'release', rspm: "https://packagemanager.rstudio.com/cran/__linux__/focal/latest"}
-          #- {os: ubuntu-20.04, r: 'devel', rspm: "https://packagemanager.rstudio.com/cran/__linux__/focal/latest"}
+          - {os: ubuntu-20.04, r: 'release', rspm: "https://packagemanager.rstudio.com/cran/__linux__/focal/latest"}
 
     env:
       R_REMOTES_NO_ERRORS_FROM_WARNINGS: true