diff --git a/test/src/tests.js b/test/src/tests.js
index ea964e0..41cbe76 100644
--- a/test/src/tests.js
+++ b/test/src/tests.js
@@ -211,6 +211,10 @@ describe('Heap Forwarder', function () {
 
         window.heap.should.be.ok;
         window.heap.track.should.be.ok;
+        // The Heap SDK initializes with a stubbed object that contains 
+        //  `envId: <app-id>` but will be replaced by `appId: <app-id>` once 
+        //  Heap fully initializes. For the purposes of our test framework,
+        // we test to make sure the stubbed methods are initialized. 
         window.heap.envId.should.equal('test-app-id');
         done();
     });