diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8ff79d626..cb0758eff 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -27,6 +27,7 @@ jobs:
       fail-fast: false
       matrix:
         ruby:
+          - head
           - 3.0.0
           - 2.7.2
           - 2.6.6
@@ -42,6 +43,9 @@ jobs:
           - { ruby: 3.0.0, appraisal: rails_5_0 }
           - { ruby: 3.0.0, appraisal: rails_5_1 }
           - { ruby: 3.0.0, appraisal: rails_5_2 }
+          - { ruby: head, appraisal: rails_5_0 }
+          - { ruby: head, appraisal: rails_5_1 }
+          - { ruby: head, appraisal: rails_5_2 }
     env:
       DATABASE_ADAPTER: ${{ matrix.adapter }}
       BUNDLE_GEMFILE: gemfiles/${{ matrix.appraisal }}.gemfile