diff --git a/.github/workflows/ruby-tests.yml b/.github/workflows/ruby-tests.yml
index f15225a..57ddfac 100644
--- a/.github/workflows/ruby-tests.yml
+++ b/.github/workflows/ruby-tests.yml
@@ -15,7 +15,13 @@ jobs:
 
     strategy:
       matrix:
-        ruby-version: [3.1, 3.0, 2.7, 2.6]
+        ruby-version:
+          - "3.1"
+          - "3.0"
+          - "2.7"
+          - "2.6"
+          - jruby
+          - truffleruby
 
     steps:
     - uses: actions/checkout@v2