diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..90730c7
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,38 @@
+name: CI
+on: push
+jobs:
+  bundler-audit:
+    name: Bundler Audit
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ruby/setup-ruby@v1
+        with:
+          bundler-cache: true
+      - run: bin/bundler-audit check --update
+  rspec:
+    name: Test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: 3.3.0
+          bundler-cache: true
+      - run: bin/test
+  rubocop:
+    name: Rubocop
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ruby/setup-ruby@v1
+        with:
+          bundler-cache: true
+      - run: bin/rubocop
+  yarn-audit:
+    name: Yarn Audit
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+      - run: yarn audit
diff --git a/Gemfile.lock b/Gemfile.lock
index d8372fb..d4aad2c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -6,6 +6,20 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
+    diff-lcs (1.5.1)
+    rspec (3.13.0)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-core (3.13.0)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.0)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.0)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.1)
 
 PLATFORMS
   arm64-darwin-23
@@ -13,6 +27,7 @@ PLATFORMS
 
 DEPENDENCIES
   dorian-to_struct!
+  rspec
 
 RUBY VERSION
    ruby 3.3.0p0
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
new file mode 100644
index 0000000..d7363d4
--- /dev/null
+++ b/spec/spec_helper.rb
@@ -0,0 +1,2 @@
+require "rspec"
+require_relative "../lib/dorian-to_struct"
diff --git a/spec/to_struct_spec.rb b/spec/to_struct_spec.rb
new file mode 100644
index 0000000..8e00a7e
--- /dev/null
+++ b/spec/to_struct_spec.rb
@@ -0,0 +1,41 @@
+require "spec_helper"
+
+HASH = {
+  first_name: "Dorian",
+  last_name: "Marié",
+  events: [
+    { name: "Party!" }
+  ]
+}
+
+STRUCT = HASH.to_struct
+DEEP_STRUCT = HASH.to_deep_struct
+
+RSpec.describe "to_struct" do
+  describe "#to_struct" do
+    it "works" do
+      expect(STRUCT.first_name).to eq("Dorian")
+      expect(STRUCT.last_name).to eq("Marié")
+    end
+
+    it "raises an eerror on missing value" do
+      expect { STRUCT.birthday }.to raise_error(NoMethodError)
+    end
+
+    it "doesn't deep structify" do
+      expect { STRUCT.events.first.name }.to raise_error(NoMethodError)
+    end
+  end
+
+  describe "@to_deep_struct" do
+    it "works" do
+      expect(DEEP_STRUCT.first_name).to eq("Dorian")
+      expect(DEEP_STRUCT.last_name).to eq("Marié")
+      expect(DEEP_STRUCT.events.first.name).to eq("Party!")
+    end
+
+    it "raises an eerror on missing value" do
+      expect { DEEP_STRUCT.birthday }.to raise_error(NoMethodError)
+    end
+  end
+end