Use must instead of chai.

package.json

@@ -87,7 +87,6 @@
   "devDependencies": {
     "babel-eslint": "^3.1.9",
     "babel-plugin-closure-elimination": "0.0.1",
-    "chai": "~2.1.2",
     "dependency-check": "^2.4.0",
     "gulp": "git://github.com/gulpjs/gulp#4.0",
     "gulp-babel": "^5",
@@ -96,6 +95,7 @@
     "gulp-sourcemaps": "^1.5.1",
     "gulp-watch": "^4.2.2",
     "mocha": "^2.2.1",
+    "must": "^0.12.0",
     "node-inspector": "^0.10.1",
     "sinon": "^1.14.1",
     "standard": "^4.0.0"

src/decorators.spec.js

@@ -1,6 +1,6 @@
 /* eslint-env mocha */
 
-import {expect} from 'chai'
+import expect from 'must'
 
 // ===================================================================
 

src/utils.spec.js

@@ -1,6 +1,6 @@
 /* eslint-env mocha */
 
-import {expect} from 'chai'
+import expect from 'must'
 
 // ===================================================================
 
@@ -12,6 +12,12 @@ import {
 // ===================================================================
 
 describe('ensureArray', function () {
+  it('wrap the value in an array', function () {
+    const value = 'foo'
+
+    expect(ensureArray(value)).to.eql([value])
+  })
+
   it('returns an empty array for undefined', function () {
     expect(ensureArray(undefined)).to.eql([])
   })
@@ -21,12 +27,6 @@ describe('ensureArray', function () {
 
     expect(ensureArray(array)).to.equal(array)
   })
-
-  it('wrap the value in an object', function () {
-    const value = {}
-
-    expect(ensureArray(value)).to.includes(value)
-  })
 })
 
 // -------------------------------------------------------------------