diff --git a/spec-main/api-app-spec.ts b/spec-main/api-app-spec.ts
index 6938338776a42..537d54c09972c 100644
--- a/spec-main/api-app-spec.ts
+++ b/spec-main/api-app-spec.ts
@@ -9,9 +9,9 @@ import * as path from 'path'
 import { homedir } from 'os'
 import split = require('split')
 import { app, BrowserWindow, Menu } from 'electron'
-import { emittedOnce } from './events-helpers';
-import { closeWindow, closeAllWindows } from './window-helpers';
-import { ifdescribe } from './spec-helpers';
+import { emittedOnce } from './events-helpers'
+import { closeWindow, closeAllWindows } from './window-helpers'
+import { ifdescribe, ifit } from './spec-helpers'
 
 const features = process.electronBinding('features')
 
@@ -373,48 +373,38 @@ describe('app module', () => {
 
     afterEach(() => closeWindow(w).then(() => { w = null as any }))
 
-    it('should emit browser-window-focus event when window is focused', (done) => {
-      app.once('browser-window-focus', (e, window) => {
-        expect(w.id).to.equal(window.id)
-        done()
-      })
+    it('should emit browser-window-focus event when window is focused', async () => {
+      const emitted = emittedOnce(app, 'browser-window-focus')
       w = new BrowserWindow({ show: false })
       w.emit('focus')
+      const [, window] = await emitted
+      expect(window.id).to.equal(w.id)
     })
 
-    it('should emit browser-window-blur event when window is blured', (done) => {
-      app.once('browser-window-blur', (e, window) => {
-        expect(w.id).to.equal(window.id)
-        done()
-      })
+    it('should emit browser-window-blur event when window is blured', async () => {
+      const emitted = emittedOnce(app, 'browser-window-blur')
       w = new BrowserWindow({ show: false })
       w.emit('blur')
+      const [, window] = await emitted
+      expect(window.id).to.equal(w.id)
     })
 
-    it('should emit browser-window-created event when window is created', (done) => {
-      app.once('browser-window-created', (e, window) => {
-        setImmediate(() => {
-          expect(w.id).to.equal(window.id)
-          done()
-        })
-      })
+    it('should emit browser-window-created event when window is created', async () => {
+      const emitted = emittedOnce(app, 'browser-window-created')
       w = new BrowserWindow({ show: false })
+      const [, window] = await emitted
+      expect(window.id).to.equal(w.id)
     })
 
-    it('should emit web-contents-created event when a webContents is created', (done) => {
-      app.once('web-contents-created', (e, webContents) => {
-        setImmediate(() => {
-          expect(w.webContents.id).to.equal(webContents.id)
-          done()
-        })
-      })
+    it('should emit web-contents-created event when a webContents is created', async () => {
+      const emitted = emittedOnce(app, 'web-contents-created')
       w = new BrowserWindow({ show: false })
+      const [, webContents] = await emitted
+      expect(webContents.id).to.equal(w.webContents.id)
     })
 
-    it('should emit renderer-process-crashed event when renderer crashes', async function() {
-      // FIXME: re-enable this test on win32.
-      if (process.platform === 'win32')
-        return this.skip()
+    // FIXME: re-enable this test on win32.
+    ifit(process.platform !== 'win32')('should emit renderer-process-crashed event when renderer crashes', async () => {
       w = new BrowserWindow({
         show: false,
         webPreferences: {
@@ -423,10 +413,10 @@ describe('app module', () => {
       })
       await w.loadURL('about:blank')
 
-      const promise = emittedOnce(app, 'renderer-process-crashed')
+      const emitted = emittedOnce(app, 'renderer-process-crashed')
       w.webContents.executeJavaScript('process.crash()')
 
-      const [, webContents] = await promise
+      const [, webContents] = await emitted
       expect(webContents).to.equal(w.webContents)
     })
 
diff --git a/spec-main/api-browser-window-spec.ts b/spec-main/api-browser-window-spec.ts
index 66701ca4edbb9..5160433449f38 100644
--- a/spec-main/api-browser-window-spec.ts
+++ b/spec-main/api-browser-window-spec.ts
@@ -802,19 +802,18 @@ describe('BrowserWindow module', () => {
     })
 
     describe('BrowserWindow.setContentSize(width, height)', () => {
-      it('sets the content size', (done) => {
+      it('sets the content size', async () => {
         // NB. The CI server has a very small screen. Attempting to size the window
         // larger than the screen will limit the window's size to the screen and
         // cause the test to fail.
         const size = [456, 567]
         w.setContentSize(size[0], size[1])
-        setImmediate(() => {
-          const after = w.getContentSize()
-          expect(after).to.deep.equal(size)
-          done()
-        })
-      })
-      it('works for a frameless window', (done) => {
+        await new Promise(setImmediate)
+        const after = w.getContentSize()
+        expect(after).to.deep.equal(size)
+      });
+
+      it('works for a frameless window', async () => {
         w.destroy()
         w = new BrowserWindow({
           show: false,
@@ -824,11 +823,9 @@ describe('BrowserWindow module', () => {
         })
         const size = [456, 567]
         w.setContentSize(size[0], size[1])
-        setImmediate(() => {
-          const after = w.getContentSize()
-          expect(after).to.deep.equal(size)
-          done()
-        })
+        await new Promise(setImmediate)
+        const after = w.getContentSize()
+        expect(after).to.deep.equal(size)
       })
     })
 
diff --git a/spec-main/api-ipc-spec.ts b/spec-main/api-ipc-spec.ts
index 3cd78f101596f..70654aa2e328d 100644
--- a/spec-main/api-ipc-spec.ts
+++ b/spec-main/api-ipc-spec.ts
@@ -44,7 +44,7 @@ describe('ipc module', () => {
     it('receives a response from an asynchronous handler', async () => {
       ipcMain.handleOnce('test', async (e: IpcMainInvokeEvent, arg: number) => {
         expect(arg).to.equal(123)
-        await new Promise(resolve => setImmediate(resolve))
+        await new Promise(setImmediate)
         return 3
       })
       const done = new Promise(resolve => ipcMain.once('result', (e, arg) => {
@@ -69,7 +69,7 @@ describe('ipc module', () => {
 
     it('receives an error from an asynchronous handler', async () => {
       ipcMain.handleOnce('test', async () => {
-        await new Promise(resolve => setImmediate(resolve))
+        await new Promise(setImmediate)
         throw new Error('some error')
       })
       const done = new Promise(resolve => ipcMain.once('result', (e, arg) => {