diff --git a/.travis.yml b/.travis.yml
index 3ea5d4f..1680a00 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,9 +1,12 @@
 node_js:
-- "4"
-- "5"
-- "6"
-- "7"
+  - stable
+  - 8
 sudo: false
 language: node_js
-script: "npm run test"
+before_script:
+  - 'curl https://sh.rustup.rs -sSf | sh -s -- -y -v'
+  - 'export PATH="$HOME/.cargo/bin:$PATH"'
+  - 'sh scripts/install.sh'
+script:
+  - 'npm test'
 # after_success: "npm i -g codecov && npm run coverage && codecov"
diff --git a/example/package.json b/example/package.json
new file mode 100644
index 0000000..0836c93
--- /dev/null
+++ b/example/package.json
@@ -0,0 +1,7 @@
+{
+  "browserify": {
+    "transform": [
+      "../"
+    ]
+  }
+}
diff --git a/package.json b/package.json
index 2b1dbf2..81f258f 100644
--- a/package.json
+++ b/package.json
@@ -8,12 +8,7 @@
     "start:external": "bankai start example/external",
     "build": "mkdir -p dist/ && browserify -t ./ example/inline.js -o dist/bundle.js",
     "build:external": "mkdir -p dist/ && browserify -t ./ example/external.js -o dist/bundle.js",
-    "test": "standard"
-  },
-  "browserify": {
-    "transform": [
-      "./"
-    ]
+    "test": "standard && node test/index.js"
   },
   "dependencies": {
     "falafel": "^2.1.0",
@@ -27,6 +22,11 @@
     "standard": "^10.0.3",
     "tape": "^4.8.0"
   },
+  "standard": {
+    "ignore": [
+      "test/*/**.js"
+    ]
+  },
   "keywords": [
     "browserify",
     "rust",
diff --git a/test/external.js b/test/external.js
new file mode 100644
index 0000000..48d108e
--- /dev/null
+++ b/test/external.js
@@ -0,0 +1,15 @@
+var test = require('tape')
+var path = require('path')
+var vm = require('vm')
+var browserify = require('browserify')
+var rustify = require('../')
+
+test('external', function (t) {
+  t.plan(2)
+  browserify(path.join(__dirname, 'external/main.js'))
+    .transform(rustify)
+    .bundle(function (err, src) {
+      t.ifError(err)
+      vm.runInNewContext(src, { T: t })
+    })
+})
diff --git a/test/external/main.js b/test/external/main.js
new file mode 100644
index 0000000..663ead2
--- /dev/null
+++ b/test/external/main.js
@@ -0,0 +1,9 @@
+var rust = require('rustify')
+
+var wasm = rust('./module.rs')
+
+WebAssembly.instantiate(wasm, {})
+  .then(function (res) {
+    var module = res.instance.exports
+    T.equal(module.fib(7), 13)
+  }).catch(T.fail)
diff --git a/test/external/module.rs b/test/external/module.rs
new file mode 100644
index 0000000..3956812
--- /dev/null
+++ b/test/external/module.rs
@@ -0,0 +1,8 @@
+#[no_mangle]
+pub fn fib(n: u32) -> u32 {
+  match n {
+    0 => 0,
+    1 => 1,
+    _ => fib(n - 1) + fib(n - 2),
+  }
+}
diff --git a/test/index.js b/test/index.js
new file mode 100644
index 0000000..0d81ca9
--- /dev/null
+++ b/test/index.js
@@ -0,0 +1,2 @@
+require('./rust')
+require('./external')
diff --git a/test/rust.js b/test/rust.js
new file mode 100644
index 0000000..5441bd2
--- /dev/null
+++ b/test/rust.js
@@ -0,0 +1,15 @@
+var test = require('tape')
+var path = require('path')
+var vm = require('vm')
+var browserify = require('browserify')
+var rustify = require('../')
+
+test('rust', function (t) {
+  t.plan(3)
+  browserify(path.join(__dirname, 'rust/main.js'))
+    .transform(rustify)
+    .bundle(function (err, src) {
+      t.ifError(err)
+      vm.runInNewContext(src, { T: t })
+    })
+})
diff --git a/test/rust/main.js b/test/rust/main.js
new file mode 100644
index 0000000..9eaa779
--- /dev/null
+++ b/test/rust/main.js
@@ -0,0 +1,14 @@
+var rust = require('rustify')
+
+var wasm = rust`
+  #[no_mangle]
+  pub fn add_one(x: i32) -> i32 {
+    x + 1
+  }
+`
+
+WebAssembly.instantiate(wasm, {}).then(function (res) {
+  var addOne = res.instance.exports.add_one
+  T.equal(addOne(41), 42)
+  T.equal(addOne(68), 69)
+}).catch(T.fail)