diff --git a/.github/workflows/cypress.yml b/.github/workflows/cypress.yml
index eeb8d90543..22827119c8 100644
--- a/.github/workflows/cypress.yml
+++ b/.github/workflows/cypress.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-18.04
     strategy:
       matrix:
-        browsers: [chrome]
+        browsers: [chrome, firefox]
     services:
       mongodb:
         image: mongo:3.6.19
diff --git a/cypress/integration/learn/challenges/output.js b/cypress/integration/learn/challenges/output.js
index a9750685f7..ebf5b2147f 100644
--- a/cypress/integration/learn/challenges/output.js
+++ b/cypress/integration/learn/challenges/output.js
@@ -40,7 +40,7 @@ describe('Classic challenge', function() {
   it('shows test output when the tests are run', () => {
     cy.visit(locations.index);
     // first wait for the editor to load
-    cy.get(selectors.editor, { timeout: 10000 });
+    cy.get(selectors.editor, { timeout: 15000 });
     cy.get(selectors.runTestsButton)
       .click()
       .then(() => {
@@ -53,7 +53,7 @@ describe('Classic challenge', function() {
   it('shows test output when the tests are triggered by the keyboard', () => {
     cy.visit(locations.index);
     // first wait for the editor to load
-    cy.get(selectors.editor, { timeout: 10000 });
+    cy.get(selectors.editor, { timeout: 15000 });
     cy.get(selectors.hotkeys)
       .focus()
       .type('{ctrl}{enter}')