diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 762e6a3..515193f 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -8,6 +8,10 @@ jobs:
       fail-fast: false
       matrix:
         ruby:
+          - ruby-2.0
+          - ruby-2.1
+          # - ruby-2.2
+          - ruby-2.3
           - ruby-2.4
           - ruby-2.5
           - ruby-2.6
@@ -15,7 +19,10 @@ jobs:
           - ruby-3.0
           - ruby-3.1
           - ruby-3.2
-          - jruby-9.2
+          - jruby-9.1
+          # - jruby-9.2
+          # - jruby-9.3
+          # - jruby-9.4
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3