diff --git a/.cspell.dictionary.txt b/.cspell.dictionary.txt
index 5e65ebc..d27b648 100644
--- a/.cspell.dictionary.txt
+++ b/.cspell.dictionary.txt
@@ -1,6 +1,7 @@
 codecov
 fcontext
 fdescribe
+racc
 rbprettier
 rubocop
 srand
diff --git a/.github/workflows/jruby-nightly.yml b/.github/workflows/jruby-nightly.yml
new file mode 100644
index 0000000..e8fadb6
--- /dev/null
+++ b/.github/workflows/jruby-nightly.yml
@@ -0,0 +1,18 @@
+name: JRuby Nightly
+
+on:
+  schedule:
+    # Checks daily
+    - cron: "0 0 * * *"
+
+jobs:
+  TestsOnNightly:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - run: rm Gemfile.lock
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: jruby-head
+          bundler-cache: true
+      - run: bundle exec rspec
diff --git a/.github/workflows/truffleruby-nightly.yml b/.github/workflows/truffleruby-nightly.yml
new file mode 100644
index 0000000..78e623d
--- /dev/null
+++ b/.github/workflows/truffleruby-nightly.yml
@@ -0,0 +1,18 @@
+name: TruffleRuby Nightly
+
+on:
+  schedule:
+    # Checks daily
+    - cron: "0 0 * * *"
+
+jobs:
+  TestsOnNightly:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - run: rm Gemfile.lock
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: truffleruby-head
+          bundler-cache: true
+      - run: bundle exec rspec
diff --git a/Gemfile b/Gemfile
index e62bdcf..7b53495 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,14 +2,19 @@ source "https://rubygems.org"
 
 gemspec
 
-gem "byebug"
-gem "prettier"
-gem "pry"
-gem "pry-byebug"
 gem "rake"
 gem "rspec"
-gem "rubocop"
-gem "rubocop-rake"
-gem "rubocop-rspec"
-gem "simplecov"
-gem "solargraph"
+
+gem "racc" # Needed for JRuby, see https://github.com/jruby/jruby/issues/6581
+
+platforms :mri do
+  gem "byebug"
+  gem "prettier"
+  gem "pry"
+  gem "pry-byebug"
+  gem "rubocop"
+  gem "rubocop-rake"
+  gem "rubocop-rspec"
+  gem "simplecov"
+  gem "solargraph"
+end
diff --git a/Gemfile.lock b/Gemfile.lock
index 9040052..ef8d321 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -143,6 +143,7 @@ DEPENDENCIES
   prettier
   pry
   pry-byebug
+  racc
   rake
   rspec
   rspec-graphql-integration!
diff --git a/README.md b/README.md
index ebc56f4..42b1894 100644
--- a/README.md
+++ b/README.md
@@ -26,6 +26,12 @@
   <a href="https://github.com/peterfication/rspec-graphql-integration/actions/workflows/ruby-nightly.yml">
     <img alt="CI" src="https://github.com/peterfication/rspec-graphql-integration/actions/workflows/ruby-nightly.yml/badge.svg" \>
   </a>
+  <a href="https://github.com/peterfication/rspec-graphql-integration/actions/workflows/truffleruby-nightly.yml">
+    <img alt="CI" src="https://github.com/peterfication/rspec-graphql-integration/actions/workflows/truffleruby-nightly.yml/badge.svg" \>
+  </a>
+  <a href="https://github.com/peterfication/rspec-graphql-integration/actions/workflows/jruby-nightly.yml">
+    <img alt="CI" src="https://github.com/peterfication/rspec-graphql-integration/actions/workflows/jruby-nightly.yml/badge.svg" \>
+  </a>
 </p>
 
 <p align="center">
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index e83152d..8506dda 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,12 +1,16 @@
-require "simplecov"
-require "byebug"
-require "pry"
-require "pry-byebug"
+begin
+  require "simplecov"
+  require "byebug"
+  require "pry"
+  require "pry-byebug"
 
-SimpleCov.start do
-  enable_coverage :branch
-  primary_coverage :branch
-  minimum_coverage 100
+  SimpleCov.start do
+    enable_coverage :branch
+    primary_coverage :branch
+    minimum_coverage 100
+  end
+rescue LoadError
+  # In TruffleRuby and JRuby, those gems are not installed.
 end
 
 require_relative "support/graphql_integration"