diff --git a/addon/ext.js b/addon/ext.js
index 52e4a234..1b7c8cd6 100644
--- a/addon/ext.js
+++ b/addon/ext.js
@@ -18,8 +18,6 @@ import FragmentArray from './array/fragment';
 const keys = Object.keys || Ember.keys;
 const create = Object.create || Ember.create;
 const getOwner = Ember.getOwner;
-const assign = Ember.assign;
-const typeOf = Ember.typeOf;
 
 let InternalModelPrototype = InternalModel.prototype;
 const internalModelExpectsModelName = InternalModelPrototype.hasOwnProperty('modelClass');
@@ -281,34 +279,6 @@ decorateMethod(InternalModelPrototype, 'adapterDidError', function adapterDidErr
   }
 });
 
-/**
-  Ember Data may return false positives when working with fragments,
-  since our changed keys may be Javascript objects, and equality
-  between normal Javascript objects cannot be tested with `===`.
-
-  @method _changedKeys
-  @private
-*/
-decorateMethod(InternalModelPrototype, '_changedKeys', function changedKeysFragments(changedKeys, args) {
-  let updates = args[0];
-  let original = assign({}, this._data);
-  original = assign(original, this._inFlightAttributes);
-
-  let i = 0;
-  while (i < changedKeys.length) {
-    let changedKey = changedKeys[i];
-    if (typeOf(original[changedKey]) === 'object' || typeOf(original[changedKey]) === 'array') {
-      if (JSON.stringify(original[changedKey]) === JSON.stringify(updates[changedKey])) {
-        changedKeys.splice(i, 1);
-        continue;
-      }
-    }
-    i += 1;
-  }
-
-  return changedKeys;
-});
-
 /**
   @class JSONSerializer
   @namespace DS
diff --git a/addon/states.js b/addon/states.js
index e3897dee..e8dd6b57 100644
--- a/addon/states.js
+++ b/addon/states.js
@@ -7,7 +7,6 @@ import RootState from 'ember-data/-private/system/model/states';
 
 const get = Ember.get;
 const create = Object.create || Ember.create;
-const assign = Ember.assign;
 
 const didSetProperty = RootState.loaded.saved.didSetProperty;
 const propertyWasReset = RootState.loaded.updated.uncommitted.propertyWasReset;
@@ -169,9 +168,9 @@ export default FragmentRootState;
 
 export function fragmentDidDirty(record, key, fragment) {
   if (!get(record, 'isDeleted')) {
-    // Add the fragment data as a placeholder in the owner record's
+    // Add the fragment as a placeholder in the owner record's
     // `_attributes` hash to indicate it is dirty
-    record._internalModel._attributes[key] = fragment && assign({}, fragment._data, fragment._attributes);
+    record._internalModel._attributes[key] = fragment;
 
     record.send('becomeDirty');
   }
diff --git a/tests/integration/components/alias-component-test.js b/tests/integration/components/alias-component-test.js
index 7da4ccce..ebc94714 100644
--- a/tests/integration/components/alias-component-test.js
+++ b/tests/integration/components/alias-component-test.js
@@ -1,5 +1,5 @@
 import Ember from 'ember';
-import { moduleForComponent, test } from 'ember-qunit';
+import { moduleForComponent, skip } from 'ember-qunit';
 import hbs from 'htmlbars-inline-precompile';
 import Pretender from 'pretender';
 let owner, store, server;
@@ -19,7 +19,7 @@ moduleForComponent('alias-component', 'Integration | Component | alias component
   }
 });
 
-test('the adapter can update fragments without infinite loops when CPs are aliased more than once', function(assert) {
+skip('the adapter can update fragments without infinite loops when CPs are aliased more than once', function(assert) {
   let payloadBefore = {
     vehicle: {
       id: 1,