diff --git a/test/core/_generator-helpers.js b/test/core/_generator-helpers.js
deleted file mode 100644
index 4eef535ee0..0000000000
--- a/test/core/_generator-helpers.js
+++ /dev/null
@@ -1,25 +0,0 @@
-var assert = require("assert");
-
-exports.check = function check(g, yields, returnValue) {
-  for (var i = 0; i < yields.length; ++i) {
-    var info = i > 0 ? g.next(i) : g.next();
-    assert.deepEqual(info.value, yields[i]);
-    assert.strictEqual(info.done, false);
-  }
-
-  assert.deepEqual(
-    i > 0 ? g.next(i) : g.next(),
-    { value: returnValue, done: true }
-  );
-};
-
-// A version of `throw` whose behavior can't be statically analyzed.
-// Useful for testing dynamic exception dispatching.
-exports.raise = function raise(argument) {
-  throw argument;
-};
-
-exports.assertAlreadyFinished = function assertAlreadyFinished(generator) {
-  var item = generator.next();
-  assert.ok(item.done && item.value === undefined, "not finished");
-};
diff --git a/test/core/_transformation-helper.js b/test/core/_transformation-helper.js
index 3768c2133e..2a3d2086ed 100644
--- a/test/core/_transformation-helper.js
+++ b/test/core/_transformation-helper.js
@@ -1,4 +1,3 @@
-var genHelpers          = require("./_generator-helpers");
 var transform           = require("../../lib/babel/transformation");
 var buildExernalHelpers = require("../../lib/babel/tools/build-external-helpers");
 var sourceMap           = require("source-map");
@@ -30,7 +29,6 @@ global.assertLacksOwnProperty = function () {
 global.assertArrayEquals = assert.deepEqual;
 global.assert = chai.assert;
 global.chai = chai;
-global.genHelpers = genHelpers;
 
 // Different Traceur generator message
 chai.assert._throw = chai.assert.throw;