diff --git a/test/headful.spec.ts b/test/headful.spec.ts
index 23bc4f86..88237c0d 100644
--- a/test/headful.spec.ts
+++ b/test/headful.spec.ts
@@ -22,7 +22,7 @@ import expect from 'expect';
 import {
   getTestState,
   describeChromeOnly,
-  itFailsWindowsUntilDate,
+  itFailsWindows,
 } from './mocha-utils';
 import rimraf from 'rimraf';
 
@@ -91,15 +91,10 @@ describeChromeOnly('headful tests', function () {
       expect(pages).toEqual(['about:blank']);
       await browser.close();
     });
-    itFailsWindowsUntilDate(
-      /* We have deferred fixing this test on Windows in favour of
-       * getting all other Windows tests running on CI. Putting this
-       * date in to force us to come back and debug properly in the
-       * future.
-       */
-      new Date('2020-07-01'),
+    itFailsWindows(
       'headless should be able to read cookies written by headful',
       async () => {
+        /* Needs investigation into why but this fails consistently on Windows CI. */
         const { server, puppeteer } = getTestState();
 
         const userDataDir = await mkdtempAsync(TMP_FOLDER);
diff --git a/test/launcher.spec.ts b/test/launcher.spec.ts
index 8be7e79f..e7be5106 100644
--- a/test/launcher.spec.ts
+++ b/test/launcher.spec.ts
@@ -472,7 +472,7 @@ describe('Launcher specs', function () {
        * properly with help from the Mozilla folks.
        */
       itFailsWindowsUntilDate(
-        new Date('2020-07-01'),
+        new Date('2020-07-30'),
         'should be able to launch Firefox',
         async () => {
           const { puppeteer } = getTestState();
diff --git a/test/mocha-utils.ts b/test/mocha-utils.ts
index 9bab15fc..51717273 100644
--- a/test/mocha-utils.ts
+++ b/test/mocha-utils.ts
@@ -170,6 +170,13 @@ export const itFailsWindowsUntilDate = (
   return it(description, body);
 };
 
+export const itFailsWindows = (description: string, body: Mocha.Func) => {
+  if (os.platform() === 'win32') {
+    return xit(description, body);
+  }
+  return it(description, body);
+};
+
 export const describeFailsFirefox = (
   description: string,
   body: (this: Mocha.Suite) => void