diff --git a/test/expect-0.2.0-ol3/expect.js b/test/expect-0.2.0-ol3/expect.js
index 7b268b63dc..2fe81d4575 100644
--- a/test/expect-0.2.0-ol3/expect.js
+++ b/test/expect-0.2.0-ol3/expect.js
@@ -509,6 +509,32 @@
     return this;
   };
 
+  /**
+   * Assert that arrays have the same value.
+   *
+   * @param {Array} other
+   *
+   * @api public
+   */
+  Assertion.prototype.equalArray =
+  Assertion.prototype.preferItBeforeItWasFamous = function(other) {
+    var equal = this.obj.length == other.length;
+    if (equal) {
+      var j = 0;
+      for (j = 0; j < other.length; ++j) {
+        if (this.obj[j] !== other[j]) {
+          equal = false;
+          break;
+        }
+      }
+    }
+    this.assert(
+        equal
+      , function(){ return 'expected ' + i(this.obj) + ' to have the same array value as ' + i(other) }
+      , function(){ return 'expected ' + i(this.obj) + ' not to have the same array value as ' + i(other) });
+    return this;
+  };
+
   /**
    * Assert a failure.
    *
diff --git a/test/spec/ol/expect.test.js b/test/spec/ol/expect.test.js
index e3f1cab072..427c861da7 100644
--- a/test/spec/ol/expect.test.js
+++ b/test/spec/ol/expect.test.js
@@ -89,4 +89,43 @@ describe('expect.js', function() {
 
   });
 
+  describe('equalArray', function() {
+
+    it('knows who\'s cool', function() {
+      expect(['me']).to.equalArray(['me']);
+    });
+
+    it('knows who isn\'t', function() {
+      expect(['you']).not.to.equalArray([]);
+    });
+
+  });
+
+  describe('preferItBeforeItWasFamous', function() {
+
+    it('respects the artist\'s privacy', function() {
+      expect(function() {
+        expect(['David', 'Bowie']).to.preferItBeforeItWasFamous(
+            ['David', 'Robert', 'Jones']);
+      }).to.throwException();
+    });
+
+    it('prefers to keep some things quiet', function() {
+      expect(function() {
+        expect(['Cyrus']).to.preferItBeforeItWasFamous(['Cyrus']);
+      }).not.to.throwException();
+
+    });
+
+  });
+
+  describe('equalArray and preferItBeforeItWasFamous', function() {
+
+    it('should record a duet together \u266c', function() {
+      expect(expect(['David Bowie']).to.equalArray).to.be(
+          expect(['Miley Cyrus']).to.preferItBeforeItWasFamous);
+    });
+
+  });
+
 });
diff --git a/test/test-extensions.js b/test/test-extensions.js
index 2cb2503e30..76c127646b 100644
--- a/test/test-extensions.js
+++ b/test/test-extensions.js
@@ -19,11 +19,6 @@ function waitsFor(condition, message, timeout, callback) {
 }
 
 
-expect.Assertion.prototype.equalArray = function(other) {
-  return goog.array.equals(this.obj, other);
-};
-
-
 // helper functions for async testing
 (function(global) {