diff --git a/packages/ember-simple-auth/addon/session-stores/adaptive.js b/packages/ember-simple-auth/addon/session-stores/adaptive.js
index 6883682d2..3fe61b43a 100644
--- a/packages/ember-simple-auth/addon/session-stores/adaptive.js
+++ b/packages/ember-simple-auth/addon/session-stores/adaptive.js
@@ -136,7 +136,7 @@ export default Base.extend({
       const cookieStorage = owner.lookup('session-store:cookie');
       const options = this.getProperties('sameSite', 'cookieDomain', 'cookieName', 'cookieExpirationTime', 'cookiePath');
 
-      cookieStorage._initialize(options);
+      cookieStorage.setProperties(options);
       this.set('cookieExpirationTime', cookieStorage.get('cookieExpirationTime'));
 
       store = cookieStorage;
diff --git a/packages/ember-simple-auth/addon/session-stores/cookie.js b/packages/ember-simple-auth/addon/session-stores/cookie.js
index bb04dff8c..315b1faeb 100644
--- a/packages/ember-simple-auth/addon/session-stores/cookie.js
+++ b/packages/ember-simple-auth/addon/session-stores/cookie.js
@@ -9,7 +9,6 @@ import { warn } from '@ember/debug';
 import Ember from 'ember';
 import BaseStore from './base';
 import objectsAreEqual from '../utils/objects-are-equal';
-import assign from 'ember-simple-auth/utils/assign';
 
 const persistingProperty = function(beforeSet = function() {}) {
   return computed({
@@ -178,16 +177,6 @@ export default BaseStore.extend({
     if (owner && !this.hasOwnProperty('_fastboot')) {
       this._fastboot = owner.lookup('service:fastboot');
     }
-  },
-
-  _initialize(options) {
-    const clonedOptions = assign({}, options);
-    if (clonedOptions.cookieName) {
-      this.set('_cookieName', clonedOptions.cookieName);
-    }
-
-    delete clonedOptions.cookieName;
-    this.setProperties(clonedOptions);
 
     let cachedExpirationTime = this._read(`${this.get('cookieName')}-expiration_time`);
     if (cachedExpirationTime) {