diff --git a/test/features/interception.spec.js b/test/features/interception.spec.js
index 6d37860abf..4a3e905be7 100644
--- a/test/features/interception.spec.js
+++ b/test/features/interception.spec.js
@@ -373,7 +373,7 @@ module.exports.addTests = function({testRunner, expect, FFOX, CHROME, WEBKIT}) {
       expect(requests.length).toBe(2);
       expect(requests[1].response().status()).toBe(404);
     });
-    it.skip(FFOX)('should not throw "Invalid Interception Id" if the request was cancelled', async({page, server}) => {
+    it('should not throw "Invalid Interception Id" if the request was cancelled', async({page, server}) => {
       await page.setContent('<iframe></iframe>');
       await page.interception.enable();
       let request = null;
diff --git a/test/frame.spec.js b/test/frame.spec.js
index fc9e81fbfe..be4ca9f008 100644
--- a/test/frame.spec.js
+++ b/test/frame.spec.js
@@ -59,7 +59,7 @@ module.exports.addTests = function({testRunner, expect, FFOX, CHROME, WEBKIT}) {
   });
 
   describe('Frame.evaluate', function() {
-    it.skip(FFOX)('should throw for detached frames', async({page, server}) => {
+    it('should throw for detached frames', async({page, server}) => {
       const frame1 = await utils.attachFrame(page, 'frame1', server.EMPTY_PAGE);
       await utils.detachFrame(page, 'frame1');
       let error = null;
diff --git a/test/navigation.spec.js b/test/navigation.spec.js
index 9603c9c2e6..b37387e6fd 100644
--- a/test/navigation.spec.js
+++ b/test/navigation.spec.js
@@ -410,7 +410,7 @@ module.exports.addTests = function({testRunner, expect, playwright, FFOX, CHROME
       expect(response).toBe(null);
       expect(page.url()).toBe(server.PREFIX + '/replaced.html');
     });
-    it.skip(FFOX)('should work with DOM history.back()/history.forward()', async({page, server}) => {
+    it('should work with DOM history.back()/history.forward()', async({page, server}) => {
       await page.goto(server.EMPTY_PAGE);
       await page.setContent(`
         <a id=back onclick='javascript:goBack()'>back</a>
diff --git a/test/page.spec.js b/test/page.spec.js
index e7b0d3bfd6..87c408a6a1 100644
--- a/test/page.spec.js
+++ b/test/page.spec.js
@@ -927,7 +927,7 @@ module.exports.addTests = function({testRunner, expect, headless, playwright, FF
       expect(await page.evaluate(() => result.onInput)).toEqual(['blue']);
       expect(await page.evaluate(() => result.onChange)).toEqual(['blue']);
     });
-    it.skip(FFOX)('should not throw when select causes navigation', async({page, server}) => {
+    it('should not throw when select causes navigation', async({page, server}) => {
       await page.goto(server.PREFIX + '/input/select.html');
       await page.$eval('select', select => select.addEventListener('input', () => window.location = '/empty.html'));
       await Promise.all([