diff --git a/.github/workflows/baseruby.yml b/.github/workflows/baseruby.yml
index 532d4a998d..788ca8f474 100644
--- a/.github/workflows/baseruby.yml
+++ b/.github/workflows/baseruby.yml
@@ -15,6 +15,7 @@ jobs:
 #         - ruby-2.5
 #         - ruby-2.6
           - ruby-2.7
+          - ruby-3.0
 
     steps:
       - uses: actions/checkout@v2