diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 92e3205..cd20ef4 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -19,6 +19,8 @@ jobs:
           - rails_4_devise_3
           - ruby_1.9.3_rails_3.2
         exclude:
+          - ruby: 'head'
+            gemfile: rails_6_devise_4
           - ruby: 'head'
             gemfile: rails_5_devise_4
           - ruby: 'head'