diff --git a/.github/workflows/ubuntu.yml b/.github/workflows/ubuntu.yml
index fefc661c..628de06b 100644
--- a/.github/workflows/ubuntu.yml
+++ b/.github/workflows/ubuntu.yml
@@ -20,6 +20,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     strategy:
+      fail-fast: false
       matrix:
         ruby:
           - "2.5"
@@ -28,9 +29,11 @@ jobs:
           - "3.0"
           - "3.1"
           - "head"
-          - "jruby-9.2.20.1"
-          - "jruby-9.3.2.0"
+          - "jruby-9.2.21.0"
+          - "jruby-9.3.9.0"
           - "jruby-head"
+          - "truffleruby-22.3.0"
+          - "truffleruby-head"
     steps:
     - uses: actions/checkout@v3
     - uses: ruby/setup-ruby@v1
diff --git a/Rakefile b/Rakefile
index f93b8fef..7f3272e1 100644
--- a/Rakefile
+++ b/Rakefile
@@ -23,7 +23,8 @@ Rake::TestTask.new(:test) do |t|
   t.ruby_opts << "-rhelper"
   t.test_files = FileList["test/**/test_*.rb"]
   if RUBY_VERSION >= "2.6"
-    t.ruby_opts << %w[--enable-frozen-string-literal --debug=frozen-string-literal]
+    t.ruby_opts << "--enable-frozen-string-literal"
+    t.ruby_opts << "--debug=frozen-string-literal" if RUBY_ENGINE != "truffleruby"
   end
 end
 gem 'rake-compiler', '>= 0.4.1'