diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index ed57d3e..a9324a0 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -129,12 +129,16 @@ jobs:
           gemfile: gemfiles/rails_3_0.gemfile
         - ruby: 2.5.9
           gemfile: gemfiles/rails_6_1.gemfile
+        - ruby: 2.5.9
+          gemfile: Gemfile
         - ruby: 2.5.9
           gemfile: gemfiles/rails_head.gemfile
         - ruby: 2.6.8
           gemfile: gemfiles/rails_3_0.gemfile
         - ruby: 2.6.8
           gemfile: gemfiles/rails_6_1.gemfile
+        - ruby: 2.6.8
+          gemfile: Gemfile
         - ruby: 2.6.8
           gemfile: gemfiles/rails_head.gemfile
         - ruby: 2.7.4