diff --git a/src/content/datachannel/datatransfer/js/test.js b/src/content/datachannel/datatransfer/js/test.js
index 6271b2b51..255fc1046 100644
--- a/src/content/datachannel/datatransfer/js/test.js
+++ b/src/content/datachannel/datatransfer/js/test.js
@@ -16,7 +16,7 @@ let driver;
 const path = '/src/content/datachannel/datatransfer/index.html';
 const url = `${process.env.BASEURL ? process.env.BASEURL : ('file://' + process.cwd())}${path}`;
 
-describe.skip('datachannel datatransfer', () => {
+describe('datachannel datatransfer', () => {
   before(() => {
     driver = seleniumHelpers.buildDriver();
   });
diff --git a/src/content/devices/input-output/js/test.js b/src/content/devices/input-output/js/test.js
index 4b0122a3c..54c1c073b 100644
--- a/src/content/devices/input-output/js/test.js
+++ b/src/content/devices/input-output/js/test.js
@@ -8,15 +8,13 @@
 /* eslint-env node, mocha */
 'use strict';
 
-const webdriver = require('selenium-webdriver');
 const seleniumHelpers = require('../../../../../test/webdriver');
-const {expect} = require('chai');
 
 let driver;
 const path = '/src/content/devices/input-output/index.html';
 const url = `${process.env.BASEURL ? process.env.BASEURL : ('file://' + process.cwd())}${path}`;
 
-describe.skip('input-output', () => {
+describe('input-output', () => {
   before(() => {
     driver = seleniumHelpers.buildDriver();
   });
@@ -30,20 +28,14 @@ describe.skip('input-output', () => {
 
   it('shows at least one audio input device', async () => {
     await driver.wait(driver.executeScript(() => {
-      window.stream !== undefined; // eslint-disable-line no-undef
+      return document.getElementById('audioSource').childElementCount > 0;
     }));
-    const numberOfSources = await driver.findElement(webdriver.By.id('audioSource'))
-        .getAttribute('childElementCount');
-    expect(numberOfSources >>> 0).to.be.above(0);
   });
 
   it('shows at least one video input device', async () => {
     await driver.wait(driver.executeScript(() => {
-      window.stream !== undefined; // eslint-disable-line no-undef
+      return document.getElementById('videoSource').childElementCount > 0;
     }));
-    const numberOfSources = await driver.findElement(webdriver.By.id('videoSource'))
-        .getAttribute('childElementCount');
-    expect(numberOfSources >>> 0).to.be.above(0);
   });
 
   it('shows at least one audio output device device', async function() {
@@ -51,11 +43,8 @@ describe.skip('input-output', () => {
       this.skip();
     }
     await driver.wait(driver.executeScript(() => {
-      window.stream !== undefined; // eslint-disable-line no-undef
+      return document.getElementById('audioOutput').childElementCount > 0;
     }));
-    const numberOfSinks = await driver.findElement(webdriver.By.id('audioOutput'))
-        .getAttribute('childElementCount');
-    expect(numberOfSinks >>> 0).to.be.above(0);
   });
 });
 
diff --git a/src/content/peerconnection/pc1/js/test.js b/src/content/peerconnection/pc1/js/test.js
index 0ad16397d..86e735825 100644
--- a/src/content/peerconnection/pc1/js/test.js
+++ b/src/content/peerconnection/pc1/js/test.js
@@ -15,7 +15,7 @@ let driver;
 const path = '/src/content/peerconnection/pc1/index.html';
 const url = `${process.env.BASEURL ? process.env.BASEURL : ('file://' + process.cwd())}${path}`;
 
-describe.skip('simple peerconnection', () => {
+describe('simple peerconnection', () => {
   before(() => {
     driver = seleniumHelpers.buildDriver();
   });
diff --git a/src/content/peerconnection/trickle-ice/js/test.js b/src/content/peerconnection/trickle-ice/js/test.js
index 934ee7508..16b7b6354 100644
--- a/src/content/peerconnection/trickle-ice/js/test.js
+++ b/src/content/peerconnection/trickle-ice/js/test.js
@@ -31,7 +31,7 @@ describe('Trickle-Ice', () => {
     return driver.executeScript(() => localStorage.clear());
   });
 
-  it.skip('gathers a candidate', async () => {
+  it('gathers a candidate', async () => {
     await driver.findElement(webdriver.By.id('gather')).click();
     await driver.wait(() => driver.executeScript(() => pc === null && candidates.length > 0), 30 * 1000); // eslint-disable-line no-undef
   });