diff --git a/experimental/babel-preset-env/.gitignore b/experimental/babel-preset-env/.gitignore
index 798a62e8f2..e746132e44 100644
--- a/experimental/babel-preset-env/.gitignore
+++ b/experimental/babel-preset-env/.gitignore
@@ -1,5 +1,6 @@
 node_modules
 lib
+test/tmp
 .DS_Store
 *.log
-.vscode
\ No newline at end of file
+.vscode
diff --git a/experimental/babel-preset-env/CONTRIBUTING.md b/experimental/babel-preset-env/CONTRIBUTING.md
index 37a61f001f..fad3b24823 100644
--- a/experimental/babel-preset-env/CONTRIBUTING.md
+++ b/experimental/babel-preset-env/CONTRIBUTING.md
@@ -34,3 +34,22 @@ Until `compat-table` is a standalone npm module for data we are using the git ur
 `"compat-table": "github:kangax/compat-table#gh-pages",`
 
 So we update and then run `npm run build-data`. If there are no changes, then `plugins.json` will be the same.
+
+### Writing Tests
+
+#### General
+
+All the tests for `babel-preset-env` exist in the `test/fixtures` folder. The
+test setup and conventions are exactly the same as testing a Babel plugin, so
+please read our [documentation on writing tests](https://github.com/babel/babel/blob/master/CONTRIBUTING.md#babel-plugin-x).
+
+#### Testing the `debug` option
+
+Testing debug output to `stdout` is similar. Under the `test/debug-fixtures`, 
+create a folder with a descriptive name of your test, and add the following:
+
+* Add a `options.json` file (just as the other tests, this is essentially a 
+`.babelrc`) with the desired test configuration (required)
+* Add a `stdout.txt` file with the expected debug output. For added 
+convenience, if there is no `stdout.txt` present, the test runner will 
+generate one for you.
diff --git a/experimental/babel-preset-env/package.json b/experimental/babel-preset-env/package.json
index 7d43418c4b..be31e2602f 100644
--- a/experimental/babel-preset-env/package.json
+++ b/experimental/babel-preset-env/package.json
@@ -52,14 +52,17 @@
   "devDependencies": {
     "babel-cli": "^6.11.4",
     "babel-eslint": "^7.1.1",
+    "babel-helper-fixtures": "^6.22.0",
     "babel-helper-plugin-test-runner": "^6.18.0",
     "babel-plugin-transform-flow-strip-types": "^6.8.0",
     "babel-preset-es2015": "^6.14.0",
     "babel-register": "^6.14.0",
+    "chai": "^3.0.0",
     "compat-table": "kangax/compat-table#b0cec63ea21f3a7788a8eececcb918de903b7fc5",
     "eslint": "^3.13.1",
     "eslint-config-babel": "^5.0.0",
     "eslint-plugin-flowtype": "^2.29.1",
+    "fs-extra": "^2.0.0",
     "lodash": "^4.15.0",
     "mocha": "^3.0.2",
     "rimraf": "^2.5.4"
diff --git a/experimental/babel-preset-env/src/normalize-options.js b/experimental/babel-preset-env/src/normalize-options.js
index 0af48ece18..6e09cbf105 100644
--- a/experimental/babel-preset-env/src/normalize-options.js
+++ b/experimental/babel-preset-env/src/normalize-options.js
@@ -21,7 +21,12 @@ export const validateIncludesAndExcludes = (opts = [], type) => {
     `Invalid Option: The '${type}' option must be an Array<String> of plugins/built-ins`
   );
 
-  const unknownOpts = opts.filter((opt) => !validIncludesAndExcludes.includes(opt));
+  const unknownOpts = [];
+  opts.forEach((opt) => {
+    if (validIncludesAndExcludes.indexOf(opt) === -1) {
+      unknownOpts.push(opt);
+    }
+  });
 
   invariant(
     unknownOpts.length === 0,
@@ -56,7 +61,7 @@ export const validateLooseOption = (looseOpt = false) => {
 
 export const validateModulesOption = (modulesOpt = "commonjs") => {
   invariant(
-    modulesOpt === false || Object.keys(moduleTransformations).includes(modulesOpt),
+    modulesOpt === false || Object.keys(moduleTransformations).indexOf(modulesOpt) > -1,
     `Invalid Option: The 'modules' option must be either 'false' to indicate no modules, or a
     module type which can be be one of: 'commonjs' (default), 'amd', 'umd', 'systemjs'.`
   );
diff --git a/experimental/babel-preset-env/test/debug-fixtures.js b/experimental/babel-preset-env/test/debug-fixtures.js
new file mode 100644
index 0000000000..76fcbf1509
--- /dev/null
+++ b/experimental/babel-preset-env/test/debug-fixtures.js
@@ -0,0 +1,104 @@
+const chai = require("chai");
+const child = require("child_process");
+const fs = require("fs-extra");
+const helper = require("babel-helper-fixtures");
+const path = require("path");
+
+const fixtureLoc = path.join(__dirname, "debug-fixtures");
+const tmpLoc = path.join(__dirname, "tmp");
+
+const clear = () => {
+  process.chdir(__dirname);
+  if (fs.existsSync(tmpLoc)) fs.removeSync(tmpLoc);
+  fs.mkdirSync(tmpLoc);
+  process.chdir(tmpLoc);
+};
+
+const saveInFiles = (files) => {
+  Object.keys(files).forEach((filename) => {
+    const content = files[filename];
+    fs.outputFileSync(filename, content);
+  });
+};
+
+const assertTest = (stdout, stderr, opts) => {
+  stderr = stderr.trim();
+
+  if (stderr) {
+    throw new Error("stderr:\n" + stderr);
+  }
+
+  stdout = stdout.trim();
+  stdout = stdout.replace(/\\/g, "/");
+
+  if (opts.stdout) {
+    const expectStdout = opts.stdout.trim();
+    chai.expect(stdout).to.equal(expectStdout, "stdout didn't match");
+  } else {
+    const file = path.join(opts.testLoc, "stdout.txt");
+    console.log(`New test file created: ${file}`);
+    fs.outputFileSync(file, stdout);
+  }
+};
+
+const buildTest = (opts) => {
+  const binLoc = path.join(process.cwd(), "node_modules/.bin/babel");
+
+  return (callback) => {
+    clear();
+    saveInFiles(opts.inFiles);
+
+    let args = [binLoc];
+    args = args.concat(opts.args);
+
+    const spawn = child.spawn(process.execPath, args);
+
+    let stdout = "";
+    let stderr = "";
+
+    spawn.stdout.on("data", (chunk) => stdout += chunk);
+    spawn.stderr.on("data", (chunk) => stderr += chunk);
+
+    spawn.on("close", () => {
+      let err;
+
+      try {
+        assertTest(stdout, stderr, opts);
+      } catch (e) {
+        err = e;
+      }
+
+      callback(err);
+    });
+  };
+};
+
+describe("debug output", () => {
+  fs.readdirSync(fixtureLoc).forEach((testName) => {
+    const testLoc = path.join(fixtureLoc, testName);
+
+    const opts = {
+      args: ["src", "--out-dir", "lib"],
+      testLoc: testLoc,
+    };
+
+    const stdoutLoc = path.join(testLoc, "stdout.txt");
+
+    if (fs.existsSync(stdoutLoc)) {
+      opts.stdout = helper.readFile(stdoutLoc);
+    }
+
+    const optionsLoc = path.join(testLoc, "options.json");
+
+    if (!fs.existsSync(optionsLoc)) {
+      throw new Error(`Debug test '${testName}' is missing an options.json file`);
+    }
+
+    opts.inFiles = {
+      "src/in.js": "",
+      ".babelrc": helper.readFile(optionsLoc),
+    };
+
+    it(testName, buildTest(opts));
+  });
+});
diff --git a/experimental/babel-preset-env/test/debug-fixtures/built-ins/options.json b/experimental/babel-preset-env/test/debug-fixtures/built-ins/options.json
new file mode 100644
index 0000000000..aca549d50c
--- /dev/null
+++ b/experimental/babel-preset-env/test/debug-fixtures/built-ins/options.json
@@ -0,0 +1,12 @@
+{
+  "presets": [
+    ["../../lib", {
+      "debug": true,
+      "targets": {
+        "browsers": "chrome >= 54, ie 10",
+        "node": 6
+      },
+      "useBuiltIns": true
+    }]
+  ]
+}
diff --git a/experimental/babel-preset-env/test/debug-fixtures/built-ins/stdout.txt b/experimental/babel-preset-env/test/debug-fixtures/built-ins/stdout.txt
new file mode 100644
index 0000000000..9d85e62916
--- /dev/null
+++ b/experimental/babel-preset-env/test/debug-fixtures/built-ins/stdout.txt
@@ -0,0 +1,113 @@
+babel-preset-env: `DEBUG` option
+
+Using targets:
+{
+  "chrome": 54,
+  "ie": 10,
+  "node": 6
+}
+
+Modules transform: commonjs
+
+Using plugins:
+  transform-es2015-arrow-functions {"ie":10}
+  transform-es2015-block-scoped-functions {"ie":10}
+  transform-es2015-block-scoping {"ie":10}
+  transform-es2015-classes {"ie":10}
+  transform-es2015-computed-properties {"ie":10}
+  check-es2015-constants {"ie":10}
+  transform-es2015-destructuring {"ie":10,"node":6}
+  transform-es2015-for-of {"ie":10,"node":6}
+  transform-es2015-function-name {"ie":10,"node":6}
+  transform-es2015-literals {"ie":10}
+  transform-es2015-object-super {"ie":10}
+  transform-es2015-parameters {"ie":10}
+  transform-es2015-shorthand-properties {"ie":10}
+  transform-es2015-spread {"ie":10}
+  transform-es2015-sticky-regex {"ie":10}
+  transform-es2015-template-literals {"ie":10}
+  transform-es2015-typeof-symbol {"ie":10}
+  transform-es2015-unicode-regex {"ie":10}
+  transform-regenerator {"ie":10}
+  transform-exponentiation-operator {"ie":10,"node":6}
+  transform-async-to-generator {"chrome":54,"ie":10,"node":6}
+  syntax-trailing-function-commas {"chrome":54,"ie":10,"node":6}
+
+Using polyfills:
+  es6.typed.uint8-clamped-array {"ie":10}
+  es6.map {"ie":10,"node":6}
+  es6.set {"ie":10,"node":6}
+  es6.weak-map {"ie":10,"node":6}
+  es6.weak-set {"ie":10,"node":6}
+  es6.reflect.apply {"ie":10,"node":6}
+  es6.reflect.construct {"ie":10,"node":6}
+  es6.reflect.define-property {"ie":10,"node":6}
+  es6.reflect.delete-property {"ie":10,"node":6}
+  es6.reflect.get {"ie":10,"node":6}
+  es6.reflect.get-own-property-descriptor {"ie":10,"node":6}
+  es6.reflect.get-prototype-of {"ie":10,"node":6}
+  es6.reflect.has {"ie":10,"node":6}
+  es6.reflect.is-extensible {"ie":10,"node":6}
+  es6.reflect.own-keys {"ie":10,"node":6}
+  es6.reflect.prevent-extensions {"ie":10,"node":6}
+  es6.reflect.set {"ie":10,"node":6}
+  es6.reflect.set-prototype-of {"ie":10,"node":6}
+  es6.promise {"ie":10,"node":6}
+  es6.symbol {"ie":10,"node":6}
+  es6.object.assign {"ie":10}
+  es6.object.is {"ie":10}
+  es6.object.set-prototype-of {"ie":10}
+  es6.function.name {"ie":10,"node":6}
+  es6.string.raw {"ie":10}
+  es6.string.from-code-point {"ie":10}
+  es6.string.code-point-at {"ie":10}
+  es6.string.repeat {"ie":10}
+  es6.string.starts-with {"ie":10}
+  es6.string.ends-with {"ie":10}
+  es6.string.includes {"ie":10}
+  es6.regexp.flags {"ie":10,"node":6}
+  es6.regexp.match {"ie":10}
+  es6.regexp.replace {"ie":10}
+  es6.regexp.split {"ie":10}
+  es6.regexp.search {"ie":10}
+  es6.array.from {"ie":10,"node":6}
+  es6.array.of {"ie":10}
+  es6.array.copy-within {"ie":10}
+  es6.array.find {"ie":10}
+  es6.array.find-index {"ie":10}
+  es6.array.fill {"ie":10}
+  es6.array.iterator {"ie":10}
+  es6.number.is-finite {"ie":10}
+  es6.number.is-integer {"ie":10}
+  es6.number.is-safe-integer {"ie":10}
+  es6.number.is-nan {"ie":10}
+  es6.number.epsilon {"ie":10}
+  es6.number.min-safe-integer {"ie":10}
+  es6.number.max-safe-integer {"ie":10}
+  es6.math.acosh {"ie":10}
+  es6.math.asinh {"ie":10}
+  es6.math.atanh {"ie":10}
+  es6.math.cbrt {"ie":10}
+  es6.math.clz32 {"ie":10}
+  es6.math.cosh {"ie":10}
+  es6.math.expm1 {"ie":10}
+  es6.math.fround {"ie":10}
+  es6.math.hypot {"ie":10}
+  es6.math.imul {"ie":10}
+  es6.math.log1p {"ie":10}
+  es6.math.log10 {"ie":10}
+  es6.math.log2 {"ie":10}
+  es6.math.sign {"ie":10}
+  es6.math.sinh {"ie":10}
+  es6.math.tanh {"ie":10}
+  es6.math.trunc {"ie":10}
+  es7.array.includes {"ie":10,"node":6}
+  es7.object.values {"ie":10,"node":6}
+  es7.object.entries {"ie":10,"node":6}
+  es7.object.get-own-property-descriptors {"ie":10,"node":6}
+  es7.string.pad-start {"chrome":54,"ie":10,"node":6}
+  es7.string.pad-end {"chrome":54,"ie":10,"node":6}
+  web.timers {"chrome":54,"ie":10,"node":6}
+  web.immediate {"chrome":54,"ie":10,"node":6}
+  web.dom.iterable {"chrome":54,"ie":10,"node":6}
+src/in.js -> lib/in.js
\ No newline at end of file
diff --git a/experimental/babel-preset-env/test/debug-fixtures/plugins-only/options.json b/experimental/babel-preset-env/test/debug-fixtures/plugins-only/options.json
new file mode 100644
index 0000000000..c04dc1ba87
--- /dev/null
+++ b/experimental/babel-preset-env/test/debug-fixtures/plugins-only/options.json
@@ -0,0 +1,15 @@
+{
+  "presets": [
+    ["../../lib", {
+      "debug": true,
+      "exclude": [
+        "transform-async-to-generator",
+        "transform-regenerator", "transform-es2015-parameters"
+      ],
+      "targets": {
+        "firefox": 52,
+        "node": 7.4
+      }
+    }]
+  ]
+}
diff --git a/experimental/babel-preset-env/test/debug-fixtures/plugins-only/stdout.txt b/experimental/babel-preset-env/test/debug-fixtures/plugins-only/stdout.txt
new file mode 100644
index 0000000000..ec43e49e9f
--- /dev/null
+++ b/experimental/babel-preset-env/test/debug-fixtures/plugins-only/stdout.txt
@@ -0,0 +1,18 @@
+babel-preset-env: `DEBUG` option
+
+Using targets:
+{
+  "firefox": 52,
+  "node": 7.4
+}
+
+Modules transform: commonjs
+
+Using plugins:
+  transform-es2015-destructuring {"firefox":52}
+  transform-es2015-for-of {"firefox":52}
+  transform-es2015-function-name {"firefox":52}
+  transform-es2015-literals {"firefox":52}
+  transform-exponentiation-operator {"node":7.4}
+  syntax-trailing-function-commas {"node":7.4}
+src/in.js -> lib/in.js
\ No newline at end of file
diff --git a/experimental/babel-preset-env/test/debug-fixtures/specific-targets/options.json b/experimental/babel-preset-env/test/debug-fixtures/specific-targets/options.json
new file mode 100644
index 0000000000..fb03d94b1a
--- /dev/null
+++ b/experimental/babel-preset-env/test/debug-fixtures/specific-targets/options.json
@@ -0,0 +1,11 @@
+{
+  "presets": [
+    ["../../lib", {
+      "debug": true,
+      "targets": {
+        "browsers": "ie 10, ios 9, safari 7, edge 13, chrome 54, firefox 49"
+      },
+      "useBuiltIns": true
+    }]
+  ]
+}
diff --git a/experimental/babel-preset-env/test/debug-fixtures/specific-targets/stdout.txt b/experimental/babel-preset-env/test/debug-fixtures/specific-targets/stdout.txt
new file mode 100644
index 0000000000..3300cba223
--- /dev/null
+++ b/experimental/babel-preset-env/test/debug-fixtures/specific-targets/stdout.txt
@@ -0,0 +1,125 @@
+babel-preset-env: `DEBUG` option
+
+Using targets:
+{
+  "chrome": 54,
+  "edge": 13,
+  "firefox": 49,
+  "ie": 10,
+  "ios": 9,
+  "safari": 7
+}
+
+Modules transform: commonjs
+
+Using plugins:
+  transform-es2015-arrow-functions {"ie":10,"ios":9,"safari":7}
+  transform-es2015-block-scoped-functions {"edge":13,"ie":10,"ios":9,"safari":7}
+  transform-es2015-block-scoping {"edge":13,"firefox":49,"ie":10,"ios":9,"safari":7}
+  transform-es2015-classes {"ie":10,"ios":9,"safari":7}
+  transform-es2015-computed-properties {"ie":10,"safari":7}
+  check-es2015-constants {"edge":13,"firefox":49,"ie":10,"ios":9,"safari":7}
+  transform-es2015-destructuring {"edge":13,"firefox":49,"ie":10,"ios":9,"safari":7}
+  transform-es2015-for-of {"edge":13,"firefox":49,"ie":10,"ios":9,"safari":7}
+  transform-es2015-function-name {"edge":13,"firefox":49,"ie":10,"ios":9,"safari":7}
+  transform-es2015-literals {"firefox":49,"ie":10,"safari":7}
+  transform-es2015-object-super {"ie":10,"ios":9,"safari":7}
+  transform-es2015-parameters {"edge":13,"firefox":49,"ie":10,"ios":9,"safari":7}
+  transform-es2015-shorthand-properties {"ie":10,"safari":7}
+  transform-es2015-spread {"ie":10,"ios":9,"safari":7}
+  transform-es2015-sticky-regex {"ie":10,"ios":9,"safari":7}
+  transform-es2015-template-literals {"ie":10,"safari":7}
+  transform-es2015-typeof-symbol {"ie":10,"safari":7}
+  transform-es2015-unicode-regex {"ie":10,"ios":9,"safari":7}
+  transform-regenerator {"firefox":49,"ie":10,"ios":9,"safari":7}
+  transform-exponentiation-operator {"edge":13,"firefox":49,"ie":10,"ios":9,"safari":7}
+  transform-async-to-generator {"chrome":54,"edge":13,"firefox":49,"ie":10,"ios":9,"safari":7}
+  syntax-trailing-function-commas {"chrome":54,"edge":13,"firefox":49,"ie":10,"ios":9,"safari":7}
+
+Using polyfills:
+  es6.typed.data-view {"edge":13}
+  es6.typed.int8-array {"edge":13}
+  es6.typed.uint8-array {"edge":13}
+  es6.typed.uint8-clamped-array {"ie":10}
+  es6.typed.int16-array {"edge":13}
+  es6.typed.uint16-array {"edge":13}
+  es6.typed.int32-array {"edge":13}
+  es6.typed.uint32-array {"edge":13}
+  es6.typed.float32-array {"edge":13}
+  es6.typed.float64-array {"edge":13}
+  es6.map {"edge":13,"firefox":49,"ie":10,"ios":9,"safari":7}
+  es6.set {"edge":13,"firefox":49,"ie":10,"ios":9,"safari":7}
+  es6.weak-map {"edge":13,"firefox":49,"ie":10,"safari":7}
+  es6.weak-set {"edge":13,"firefox":49,"ie":10,"safari":7}
+  es6.reflect.apply {"ie":10,"ios":9,"safari":7}
+  es6.reflect.construct {"ie":10,"ios":9,"safari":7}
+  es6.reflect.define-property {"ie":10,"ios":9,"safari":7}
+  es6.reflect.delete-property {"ie":10,"ios":9,"safari":7}
+  es6.reflect.get {"ie":10,"ios":9,"safari":7}
+  es6.reflect.get-own-property-descriptor {"ie":10,"ios":9,"safari":7}
+  es6.reflect.get-prototype-of {"ie":10,"ios":9,"safari":7}
+  es6.reflect.has {"ie":10,"ios":9,"safari":7}
+  es6.reflect.is-extensible {"ie":10,"ios":9,"safari":7}
+  es6.reflect.own-keys {"ie":10,"ios":9,"safari":7}
+  es6.reflect.prevent-extensions {"ie":10,"ios":9,"safari":7}
+  es6.reflect.set {"ie":10,"ios":9,"safari":7}
+  es6.reflect.set-prototype-of {"ie":10,"ios":9,"safari":7}
+  es6.promise {"ie":10,"ios":9,"safari":7}
+  es6.symbol {"edge":13,"firefox":49,"ie":10,"ios":9,"safari":7}
+  es6.object.assign {"ie":10,"safari":7}
+  es6.object.is {"ie":10,"safari":7}
+  es6.object.set-prototype-of {"edge":13,"ie":10,"safari":7}
+  es6.function.name {"edge":13,"firefox":49,"ie":10,"ios":9,"safari":7}
+  es6.string.raw {"ie":10,"safari":7}
+  es6.string.from-code-point {"ie":10,"safari":7}
+  es6.string.code-point-at {"ie":10,"safari":7}
+  es6.string.repeat {"ie":10,"safari":7}
+  es6.string.starts-with {"ie":10,"safari":7}
+  es6.string.ends-with {"ie":10,"safari":7}
+  es6.string.includes {"ie":10,"safari":7}
+  es6.regexp.flags {"edge":13,"ie":10,"safari":7}
+  es6.regexp.match {"edge":13,"ie":10,"ios":9,"safari":7}
+  es6.regexp.replace {"edge":13,"ie":10,"ios":9,"safari":7}
+  es6.regexp.split {"edge":13,"ie":10,"ios":9,"safari":7}
+  es6.regexp.search {"edge":13,"ie":10,"ios":9,"safari":7}
+  es6.array.from {"edge":13,"ie":10,"ios":9,"safari":7}
+  es6.array.of {"ie":10,"safari":7}
+  es6.array.copy-within {"ie":10,"safari":7}
+  es6.array.find {"ie":10,"safari":7}
+  es6.array.find-index {"ie":10,"safari":7}
+  es6.array.fill {"ie":10,"safari":7}
+  es6.array.iterator {"ie":10,"safari":7}
+  es6.number.is-finite {"ie":10,"safari":7}
+  es6.number.is-integer {"ie":10,"safari":7}
+  es6.number.is-safe-integer {"ie":10,"safari":7}
+  es6.number.is-nan {"ie":10,"safari":7}
+  es6.number.epsilon {"ie":10,"safari":7}
+  es6.number.min-safe-integer {"ie":10,"safari":7}
+  es6.number.max-safe-integer {"ie":10,"safari":7}
+  es6.math.acosh {"ie":10,"safari":7}
+  es6.math.asinh {"ie":10,"safari":7}
+  es6.math.atanh {"ie":10,"safari":7}
+  es6.math.cbrt {"ie":10,"safari":7}
+  es6.math.clz32 {"ie":10,"safari":7}
+  es6.math.cosh {"ie":10,"safari":7}
+  es6.math.expm1 {"ie":10,"safari":7}
+  es6.math.fround {"ie":10,"safari":7}
+  es6.math.hypot {"ie":10,"safari":7}
+  es6.math.imul {"ie":10}
+  es6.math.log1p {"ie":10,"safari":7}
+  es6.math.log10 {"ie":10,"safari":7}
+  es6.math.log2 {"ie":10,"safari":7}
+  es6.math.sign {"ie":10,"safari":7}
+  es6.math.sinh {"ie":10,"safari":7}
+  es6.math.tanh {"ie":10,"safari":7}
+  es6.math.trunc {"ie":10,"safari":7}
+  es7.array.includes {"edge":13,"ie":10,"ios":9,"safari":7}
+  es7.object.values {"edge":13,"ie":10,"ios":9,"safari":7}
+  es7.object.entries {"edge":13,"ie":10,"ios":9,"safari":7}
+  es7.object.get-own-property-descriptors {"edge":13,"firefox":49,"ie":10,"ios":9,"safari":7}
+  es7.string.pad-start {"chrome":54,"edge":13,"ie":10,"ios":9,"safari":7}
+  es7.string.pad-end {"chrome":54,"edge":13,"ie":10,"ios":9,"safari":7}
+  web.timers {"chrome":54,"edge":13,"firefox":49,"ie":10,"ios":9,"safari":7}
+  web.immediate {"chrome":54,"edge":13,"firefox":49,"ie":10,"ios":9,"safari":7}
+  web.dom.iterable {"chrome":54,"edge":13,"firefox":49,"ie":10,"ios":9,"safari":7}
+src/in.js -> lib/in.js
\ No newline at end of file
diff --git a/experimental/babel-preset-env/yarn.lock b/experimental/babel-preset-env/yarn.lock
index fc107025d4..4a6bfb3689 100644
--- a/experimental/babel-preset-env/yarn.lock
+++ b/experimental/babel-preset-env/yarn.lock
@@ -300,6 +300,14 @@ babel-helper-fixtures@^6.20.0:
     lodash "^4.2.0"
     try-resolve "^1.0.0"
 
+babel-helper-fixtures@^6.22.0:
+  version "6.22.0"
+  resolved "https://registry.yarnpkg.com/babel-helper-fixtures/-/babel-helper-fixtures-6.22.0.tgz#3cb9eaf5feae29f001d2754ab43b14a9dfa304ff"
+  dependencies:
+    babel-runtime "^6.22.0"
+    lodash "^4.2.0"
+    try-resolve "^1.0.0"
+
 babel-helper-function-name@^6.18.0, babel-helper-function-name@^6.8.0:
   version "6.18.0"
   resolved "https://registry.yarnpkg.com/babel-helper-function-name/-/babel-helper-function-name-6.18.0.tgz#68ec71aeba1f3e28b2a6f0730190b754a9bf30e6"
@@ -824,6 +832,13 @@ babel-runtime@^6.0.0, babel-runtime@^6.11.6, babel-runtime@^6.18.0, babel-runtim
     core-js "^2.4.0"
     regenerator-runtime "^0.10.0"
 
+babel-runtime@^6.22.0:
+  version "6.22.0"
+  resolved "https://registry.yarnpkg.com/babel-runtime/-/babel-runtime-6.22.0.tgz#1cf8b4ac67c77a4ddb0db2ae1f74de52ac4ca611"
+  dependencies:
+    core-js "^2.4.0"
+    regenerator-runtime "^0.10.0"
+
 babel-template@^6.14.0, babel-template@^6.15.0, babel-template@^6.16.0, babel-template@^6.8.0:
   version "6.16.0"
   resolved "https://registry.yarnpkg.com/babel-template/-/babel-template-6.16.0.tgz#e149dd1a9f03a35f817ddbc4d0481988e7ebc8ca"
@@ -1626,6 +1641,13 @@ form-data@~2.1.1:
     combined-stream "^1.0.5"
     mime-types "^2.1.12"
 
+fs-extra@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/fs-extra/-/fs-extra-2.0.0.tgz#337352bded4a0b714f3eb84de8cea765e9d37600"
+  dependencies:
+    graceful-fs "^4.1.2"
+    jsonfile "^2.1.0"
+
 fs-readdir-recursive@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/fs-readdir-recursive/-/fs-readdir-recursive-1.0.0.tgz#8cd1745c8b4f8a29c8caec392476921ba195f560"
@@ -1752,7 +1774,7 @@ globby@^5.0.0:
     pify "^2.0.0"
     pinkie-promise "^2.0.0"
 
-graceful-fs@^4.1.2, graceful-fs@^4.1.4:
+graceful-fs@^4.1.2, graceful-fs@^4.1.4, graceful-fs@^4.1.6:
   version "4.1.11"
   resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.1.11.tgz#0e8bdfe4d1ddb8854d64e04ea7c00e2a026e5658"
 
@@ -2111,6 +2133,12 @@ json5@^0.5.0:
   version "0.5.1"
   resolved "https://registry.yarnpkg.com/json5/-/json5-0.5.1.tgz#1eade7acc012034ad84e2396767ead9fa5495821"
 
+jsonfile@^2.1.0:
+  version "2.4.0"
+  resolved "https://registry.yarnpkg.com/jsonfile/-/jsonfile-2.4.0.tgz#3736a2b428b87bbda0cc83b53fa3d633a35c2ae8"
+  optionalDependencies:
+    graceful-fs "^4.1.6"
+
 jsonify@~0.0.0:
   version "0.0.0"
   resolved "https://registry.yarnpkg.com/jsonify/-/jsonify-0.0.0.tgz#2c74b6ee41d93ca51b7b5aaee8f503631d252a73"