diff --git a/packages/__tests__/src/legacy/eventSourcesICalFeed.js b/packages/__tests__/src/legacy/eventSourcesICalFeed.js
index a83d2da760..35aba95f16 100644
--- a/packages/__tests__/src/legacy/eventSourcesICalFeed.js
+++ b/packages/__tests__/src/legacy/eventSourcesICalFeed.js
@@ -2,6 +2,8 @@ import XHRMock from 'xhr-mock'
 import { CalendarWrapper } from '../lib/wrappers/CalendarWrapper'
 
 describe('addICalEventSource', function() {
+  const ICAL_MIME_TYPE = 'text/calendar'
+
   // This is a bit gross to dump straight in the test. Could it be pulled out
   // to a separate file, or put somewhere neater?
   const ICAL_FEED = `
@@ -45,43 +47,23 @@ END:VEVENT
     XHRMock.teardown()
   })
 
-  it('correctly adds an array source', function(done) {
-    XHRMock.get(/^mock.ics/, function(req, res) {
+  it('correctly adds an ical feed source', async (done) => {
+    XHRMock.get('/mock.ics', function(req, res) {
       expect(req.url().query).toEqual({})
 
-      done()
       return res.status(200)
-        .header('content-type', 'application/json')
+        .header('content-type', ICAL_MIME_TYPE)
         .body(ICAL_FEED)
     })
-    go(
-      function() {
-        currentCalendar.addEventSource(iCalFeedSource)
-      },
-      null,
-      done
-    )
-  })
-
-  function go(addFunc, extraTestFunc, doneFunc) {
-    initCalendar()
-    addFunc()
-
-    checkAllEvents()
-    if (extraTestFunc) {
-      extraTestFunc()
-    }
-
-    setTimeout(function() {
 
+    const calendar = initCalendar()
+    
+    calendar.addEventSource(iCalFeedSource)
+    setTimeout(() => {
       checkAllEvents()
-      if (extraTestFunc) {
-        extraTestFunc()
-      }
-
-      doneFunc()
-    }, 0)
-  }
+      done()
+    }, 200)
+  })
 
   // Checks to make sure all events have been rendered and that the calendar
   // has internal info on all the events.
diff --git a/packages/common/src/event-sources/ical-feed-event-source.ts b/packages/common/src/event-sources/ical-feed-event-source.ts
index 654dd4df11..f6d06a8ad5 100644
--- a/packages/common/src/event-sources/ical-feed-event-source.ts
+++ b/packages/common/src/event-sources/ical-feed-event-source.ts
@@ -1,22 +1,43 @@
-import { requestJson } from '../util/requestJson'
 import { EventSourceDef } from '../structs/event-source-def'
 import { __assign } from 'tslib'
 import { createPlugin } from '../plugin-system'
 import { ICAL_FEED_EVENT_SOURCE_REFINERS } from './ical-feed-event-source-refiners'
 
+export function requestICal(url: string, successCallback, failureCallback) {
+
+  const xhr = new XMLHttpRequest()
+  xhr.open('GET', url, true)
+
+  xhr.onload = function() {
+    if (xhr.status >= 200 && xhr.status < 400) {
+
+      const iCalFeed = xhr.responseText
+      console.log(iCalFeed)
+
+      successCallback(iCalFeed, xhr)
+    } else {
+      failureCallback('Request failed', xhr)
+    }
+  }
+
+  xhr.onerror = () => failureCallback('Request failed', xhr)
+
+  xhr.send(null)
+}
+
+
 interface ICalFeedMeta {
   feedUrl: string
-  method: string
   extraParams?: any
 }
 
+
 let eventSourceDef: EventSourceDef<ICalFeedMeta> = {
 
   parseMeta(refined) {
     if (refined.feedUrl) {
       return {
         feedUrl: refined.feedUrl,
-        method: (refined.method || 'GET').toUpperCase(),
       }
     }
     return null
@@ -24,27 +45,28 @@ let eventSourceDef: EventSourceDef<ICalFeedMeta> = {
 
   fetch(arg, success, failure) {
     let meta: ICalFeedMeta = arg.eventSource.meta
-    let requestParams = buildRequestParams(meta)
-
-    requestJson(
-      meta.method, meta.feedUrl, requestParams,
-      function(_, xhr) {
-        const rawEvents = [
-          {
-            title: 'id-123',
-            start: '2019-04-10T10:30:00Z',
-            end: '2019-04-13T17:00Z',
-          },
-        ]
-
-        success({ rawEvents, xhr })
-      },
-      function(errorMessage, xhr) {
-        failure({ message: errorMessage, xhr })
-      }
-    )
-  }
 
+    return new Promise((resolve, reject) => {
+      requestICal(meta.feedUrl,
+        (_, xhr) => {
+          const rawEvents = [
+            {
+              title: 'id-123',
+              start: '2019-04-10T10:30:00Z',
+              end: '2019-04-13T17:00Z',
+            },
+          ]
+
+          success({ rawEvents, xhr })
+          resolve()
+        },
+        (errorMessage, xhr) => {
+          failure({ message: errorMessage, xhr })
+          reject()
+        },
+      )
+    })
+  }
 }
 
 
@@ -52,19 +74,3 @@ export const iCalFeedEventSourcePlugin = createPlugin({
   eventSourceRefiners: ICAL_FEED_EVENT_SOURCE_REFINERS,
   eventSourceDefs: [ eventSourceDef ]
 })
-
-
-function buildRequestParams(meta: ICalFeedMeta) {
-  let customRequestParams
-  let params = {}
-
-  if (typeof meta.extraParams === 'function') {
-    customRequestParams = meta.extraParams()
-  } else {
-    customRequestParams = meta.extraParams || {}
-  }
-
-  __assign(params, customRequestParams)
-
-  return params
-}