diff --git a/spec/javascripts/jsx/external_apps/routerSpec.js b/spec/javascripts/jsx/external_apps/routerSpec.js
deleted file mode 100644
index 63e6564dbc74f..0000000000000
--- a/spec/javascripts/jsx/external_apps/routerSpec.js
+++ /dev/null
@@ -1,53 +0,0 @@
-/*
- * Copyright (C) 2016 - present Instructure, Inc.
- *
- * This file is part of Canvas.
- *
- * Canvas is free software: you can redistribute it and/or modify it under
- * the terms of the GNU Affero General Public License as published by the Free
- * Software Foundation, version 3 of the License.
- *
- * Canvas is distributed in the hope that it will be useful, but WITHOUT ANY
- * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
- * A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
- * details.
- *
- * You should have received a copy of the GNU Affero General Public License along
- * with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-import regularizePathname from 'ui/features/external_apps/react/lib/regularizePathname.js'
-
-QUnit.module('External Apps Client-side Router', {
-  before() {
-    window.ENV = window.ENV || {}
-    window.ENV.TESTING_PATH = '/settings/something'
-  }
-})
-
-test('regularizePathname removes trailing slash', () => {
-  const fakeCtx = {
-    pathname: '/app/something/else/'
-  }
-
-  // No op for next().
-  const fakeNext = () => {}
-
-  regularizePathname(fakeCtx, fakeNext)
-
-  equal(fakeCtx.pathname, '/app/something/else', 'trailing slash is gone')
-})
-
-test('regularizePathname removes url hash fragment', () => {
-  const fakeCtx = {
-    hash: 'blah-ha-ba',
-    pathname: '/app/something/else/#blah-ha-ba'
-  }
-
-  // No op for next().
-  const fakeNext = () => {}
-
-  regularizePathname(fakeCtx, fakeNext)
-
-  equal(fakeCtx.pathname, '/app/something/else', 'url hash fragment is gone')
-})
diff --git a/ui/features/external_apps/react/components/AppList.js b/ui/features/external_apps/react/components/AppList.js
index 56523e7d567a2..9824c45593c2b 100644
--- a/ui/features/external_apps/react/components/AppList.js
+++ b/ui/features/external_apps/react/components/AppList.js
@@ -18,6 +18,7 @@
 
 import I18n from 'i18n!external_tools'
 import React from 'react'
+import PropTypes from 'prop-types'
 import store from '../lib/AppCenterStore'
 import extStore from '../lib/ExternalAppsStore'
 import AppTile from './AppTile'
@@ -27,6 +28,10 @@ import ManageAppListButton from './ManageAppListButton'
 import splitAssetString from '@canvas/util/splitAssetString'
 
 export default class AppList extends React.Component {
+  static propTypes = {
+    baseUrl: PropTypes.string.isRequired
+  }
+
   state = store.getState()
 
   onChange = () => {
@@ -67,7 +72,7 @@ export default class AppList extends React.Component {
     } else {
       return store
         .filteredApps()
-        .map(app => <AppTile key={app.app_id} app={app} pathname={this.props.pathname} />)
+        .map(app => <AppTile key={app.app_id} app={app} baseUrl={this.props.baseUrl} />)
     }
   }
 
@@ -79,7 +84,7 @@ export default class AppList extends React.Component {
         <Header>
           {this.manageAppListButton()}
           <a
-            href={`${this.props.pathname}/configurations`}
+            href={`${this.props.baseUrl}/configurations`}
             className="btn view_tools_link lm pull-right"
           >
             {I18n.t('View App Configurations')}
diff --git a/ui/features/external_apps/react/components/AppTile.js b/ui/features/external_apps/react/components/AppTile.js
index 83a605a0c6b2d..67da6f0e4878f 100644
--- a/ui/features/external_apps/react/components/AppTile.js
+++ b/ui/features/external_apps/react/components/AppTile.js
@@ -19,11 +19,17 @@
 import I18n from 'i18n!external_tools'
 import $ from 'jquery'
 import React from 'react'
+import PropTypes from 'prop-types'
 import page from 'page'
 
 export default class extends React.Component {
   static displayName = 'AppTile'
 
+  static propTypes = {
+    app: PropTypes.object,
+    baseUrl: PropTypes.string.isRequired
+  }
+
   state = {
     isHidingDetails: true
   }
@@ -53,7 +59,7 @@ export default class extends React.Component {
 
   handleClick = e => {
     e.preventDefault()
-    page(`${this.props.pathname}/app/${this.props.app.short_name}`)
+    page(`${this.props.baseUrl}/app/${this.props.app.short_name}`)
   }
 
   installedRibbon = () => {
diff --git a/ui/features/external_apps/react/components/__tests__/AppList.test.js b/ui/features/external_apps/react/components/__tests__/AppList.test.js
index d6f89c573ab91..ed7286b5e5576 100644
--- a/ui/features/external_apps/react/components/__tests__/AppList.test.js
+++ b/ui/features/external_apps/react/components/__tests__/AppList.test.js
@@ -127,35 +127,47 @@ describe('AppList', () => {
     $.ajax = originalAJAX
   })
 
+  function renderAppList() {
+    return render(<AppList baseUrl="/the/base/url" />)
+  }
+
   it('renders loading indicator', () => {
     store.setState({isLoading: true})
-    const {getByTestId} = render(<AppList />)
+    const {getByTestId} = renderAppList()
     expect(getByTestId(/Spinner/i)).toBeVisible()
   })
 
   it('does not apply focus to filter text input on render', () => {
-    const {getByText} = render(<AppList />)
+    const {getByText} = renderAppList()
     expect(getByText('Filter by name')).not.toHaveFocus()
   })
 
   it('renders manage app list button if context type is account', () => {
-    const {getByText} = render(<AppList />)
+    const stuff = renderAppList()
+    const {getByText} = stuff
     expect(getByText('Manage App List')).toBeVisible()
   })
 
   it('does not render manage app list button if context type is not account', () => {
     window.ENV = {context_asset_string: 'course_1'}
-    const {queryByText} = render(<AppList />)
+    const {queryByText} = renderAppList()
     expect(queryByText('Manage App List')).not.toBeInTheDocument()
   })
 
   it('renders view app configurations link', () => {
-    const {getByText} = render(<AppList />)
+    const {getByText} = renderAppList()
     expect(getByText('View App Configurations')).toBeVisible()
   })
 
+  it('uses baseUrl for the app configurations link', () => {
+    const {getByText} = renderAppList()
+    expect(getByText('View App Configurations').closest('a').getAttribute('href')).toEqual(
+      '/the/base/url/configurations'
+    )
+  })
+
   it('renders app filters', () => {
-    const {getByText} = render(<AppList />)
+    const {getByText} = renderAppList()
     expect(getByText('All')).toBeVisible()
     expect(getByText('Not Installed')).toBeVisible()
     expect(getByText('Installed')).toBeVisible()
diff --git a/ui/features/external_apps/react/lib/regularizePathname.js b/ui/features/external_apps/react/lib/regularizePathname.js
deleted file mode 100644
index 8695a516a9aac..0000000000000
--- a/ui/features/external_apps/react/lib/regularizePathname.js
+++ /dev/null
@@ -1,29 +0,0 @@
-/*
- * Copyright (C) 2016 - present Instructure, Inc.
- *
- * This file is part of Canvas.
- *
- * Canvas is free software: you can redistribute it and/or modify it under
- * the terms of the GNU Affero General Public License as published by the Free
- * Software Foundation, version 3 of the License.
- *
- * Canvas is distributed in the hope that it will be useful, but WITHOUT ANY
- * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
- * A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
- * details.
- *
- * You should have received a copy of the GNU Affero General Public License along
- * with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-/**
- * This makes the pathname always leave off a potential trailing
- * slash.
- */
-const regularizePathname = (ctx, next) => {
-  ctx.originalPathname = ctx.pathname
-  ctx.pathname = ctx.pathname.replace('#' + ctx.hash, '').replace(/\/$/, '')
-  next()
-}
-
-export default regularizePathname
diff --git a/ui/features/external_apps/react/router.js b/ui/features/external_apps/react/router.js
index 09483def23fe6..170f40b41c7da 100644
--- a/ui/features/external_apps/react/router.js
+++ b/ui/features/external_apps/react/router.js
@@ -24,7 +24,6 @@ import AppList from './components/AppList'
 import AppDetails from './components/AppDetails'
 import Configurations from './components/Configurations'
 import AppCenterStore from './lib/AppCenterStore'
-import regularizePathname from './lib/regularizePathname'
 
 const currentPath = window.location.pathname
 const re = /(.*\/settings|.*\/details)/
@@ -32,46 +31,39 @@ const matches = re.exec(currentPath)
 const baseUrl = matches[0]
 
 let targetNodeToRenderIn = null
-let alreadyRendered = false
 
 /**
  * Route Handlers
  */
-const renderAppList = ctx => {
+const renderAppList = _ctx => {
   if (!window.ENV.APP_CENTER.enabled) {
     page.redirect('/configurations')
   } else {
     ReactDOM.render(
       <Root>
-        <AppList pathname={ctx.pathname} alreadyRendered={alreadyRendered} />
+        <AppList baseUrl={baseUrl} />
       </Root>,
       targetNodeToRenderIn
     )
-    alreadyRendered = true
   }
 }
 
 const renderAppDetails = ctx => {
   ReactDOM.render(
     <Root>
-      <AppDetails
-        shortName={ctx.params.shortName}
-        pathname={ctx.pathname}
-        baseUrl={baseUrl}
-        store={AppCenterStore}
-      />
+      <AppDetails shortName={ctx.params.shortName} baseUrl={baseUrl} store={AppCenterStore} />
     </Root>,
     targetNodeToRenderIn
   )
 }
 
-const renderConfigurations = ctx => {
+const renderConfigurations = _ctx => {
   // router.start is only called when loading the Apps tab
   // so we don't want to try anything here that hasn't happened.
   if (targetNodeToRenderIn) {
     ReactDOM.render(
       <Root>
-        <Configurations pathname={ctx.pathname} env={window.ENV} />
+        <Configurations pathname={baseUrl} env={window.ENV} />
       </Root>,
       targetNodeToRenderIn
     )
@@ -82,7 +74,6 @@ const renderConfigurations = ctx => {
  * Route Configuration
  */
 page.base(baseUrl)
-page('*', regularizePathname)
 page('/', renderAppList)
 page('/app/:shortName', renderAppDetails)
 page('/configurations', renderConfigurations)
@@ -95,6 +86,5 @@ export default {
   stop() {
     // we may not be the only thing using page on this page.
     page.stop()
-  },
-  regularizePathname
+  }
 }