diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index b2983d53..6f67ad06 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -30,6 +30,12 @@ jobs:
           # Ruby 3.x is not supported by Rails 5.2.x
           - ruby_version: 3.0
             gemfile: gemfiles/Gemfile.rails-5.2.x
+          # Ruby 3.x is not supported by Rails 5.1.x
+          - ruby_version: 3.0
+            gemfile: gemfiles/Gemfile.rails-5.1.x
+          # Ruby 3.x is not supported by Rails 5.0.x
+          - ruby_version: 3.0
+            gemfile: gemfiles/Gemfile.rails-5.0.x
           # Ruby 2.6.x is not supported by Rails main
           - ruby_version: 2.6
             gemfile: gemfiles/Gemfile.rails-main