diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 55ee1f7..3ac3406 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -19,7 +19,7 @@ jobs:
           - ~> 5.2.0
           - ~> 6.0.0
           - ~> 6.1.0
-          - ~> main
+          - ~> 7.0.0.alpha2
     container: docker://ruby
     steps:
     - uses: actions/checkout@v1