diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
new file mode 100644
index 000000000..070815b16
--- /dev/null
+++ b/.github/workflows/lint.yml
@@ -0,0 +1,25 @@
+name: Lint
+
+on:
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  linux:
+    name: Linux - Lint
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+      - uses: actions/setup-node@v2
+        with:
+          node-version: 14
+          cache: npm
+      - run: npm ci
+      - run: |
+          npm run commitlint -- \
+          --verbose \
+          --from `git merge-base origin/master $GITHUB_SHA`
+      - run: npm run lint
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 82d51b1b3..13fea22eb 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -7,7 +7,7 @@ on:
 
 jobs:
   main:
-    name: Lint and Unit (Client and Server), E2E and Integration Test
+    name: Unit (Client and Server), E2E and Integration Test
     runs-on: ubuntu-latest
     env:
       BROWSERSTACK_USERNAME: ${{ secrets.BROWSERSTACK_USERNAME }}
@@ -23,8 +23,6 @@ jobs:
           node-version: 14
           cache: npm
       - run: npm ci
-      - run: npm run commitlint -- --from `git merge-base origin/master $GITHUB_SHA`
-      - run: npm run lint
       - run: npm run build:check
       - run: npm run test:unit
       - run: npm run test:e2e
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 72d1870c0..e2500bf93 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,10 @@
+## [6.3.19](https://github.com/karma-runner/karma/compare/v6.3.18...v6.3.19) (2022-04-19)
+
+
+### Bug Fixes
+
+* **client:** error out when opening a new tab fails ([099b85e](https://github.com/karma-runner/karma/commit/099b85ed0a46e37dd7cb14fc1596cbb1b3eabce9))
+
 ## [6.3.18](https://github.com/karma-runner/karma/compare/v6.3.17...v6.3.18) (2022-04-13)
 
 
diff --git a/client/karma.js b/client/karma.js
index 9e13d89df..117c1239b 100644
--- a/client/karma.js
+++ b/client/karma.js
@@ -94,6 +94,9 @@ function Karma (updater, socket, iframe, opener, navigator, location, document)
           childWindow.close()
         }
         childWindow = opener(url)
+        if (childWindow === null) {
+          self.error('Opening a new tab/window failed, probably because pop-ups are blocked.')
+        }
       // run context on parent element (client_with_context)
       // using window.__karma__.scriptUrls to get the html element strings and load them dynamically
       } else if (url !== 'about:blank') {
diff --git a/package-lock.json b/package-lock.json
index f230766d6..3e2206d31 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "karma",
-  "version": "6.3.18",
+  "version": "6.3.19",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index e5ba090f1..7487c353b 100644
--- a/package.json
+++ b/package.json
@@ -35,10 +35,10 @@
     "Christian Budde Christensen <budde377@gmail.com>",
     "Wesley Cho <wesley.cho@gmail.com>",
     "taichi <ryushi@gmail.com>",
+    "Jonathan Ginsburg <jon@than.ml>",
     "Liam Newman <bitwiseman@gmail.com>",
     "lukasz <lukasz.usarz@gmail.com>",
     "Anton <anton.redfox@gmail.com>",
-    "Jonathan Ginsburg <jon@than.ml>",
     "Michał Gołębiowski-Owczarek <m.goleb@gmail.com>",
     "Todd Wolfson <todd@twolfson.com>",
     "Mark Trostler <mark@zzo.com>",
@@ -499,7 +499,7 @@
   "engines": {
     "node": ">= 10"
   },
-  "version": "6.3.18",
+  "version": "6.3.19",
   "license": "MIT",
   "scripts": {
     "lint": "eslint . --ext js --ignore-pattern *.tpl.js",
diff --git a/static/karma.js b/static/karma.js
index 04c7ad322..f72f024ed 100644
--- a/static/karma.js
+++ b/static/karma.js
@@ -104,6 +104,9 @@ function Karma (updater, socket, iframe, opener, navigator, location, document)
           childWindow.close()
         }
         childWindow = opener(url)
+        if (childWindow === null) {
+          self.error('Opening a new tab/window failed, probably because pop-ups are blocked.')
+        }
       // run context on parent element (client_with_context)
       // using window.__karma__.scriptUrls to get the html element strings and load them dynamically
       } else if (url !== 'about:blank') {