diff --git a/.github/workflows/pull-request.yml b/.github/workflows/pull-request.yml
index 9c66a294d4..b8b4ec2162 100644
--- a/.github/workflows/pull-request.yml
+++ b/.github/workflows/pull-request.yml
@@ -173,7 +173,7 @@ jobs:
       - uses: ./.github/actions/upload-node-modules-and-artifacts
 
   unit-tests:
-    timeout-minutes: 30
+    timeout-minutes: 60
     name: "Unit tests: ${{ matrix.unit-tests.name }}"
     runs-on: ubuntu-latest
     needs: [setup]
diff --git a/lib/core/karma.conf.js b/lib/core/karma.conf.js
index 8f8ba32b11..a296a03632 100644
--- a/lib/core/karma.conf.js
+++ b/lib/core/karma.conf.js
@@ -8,9 +8,9 @@ module.exports = function (config) {
     config.set({
         basePath: '../../',
         files: [
-            { pattern: 'node_modules/pdfjs-dist/build/pdf.min.mjs', type: 'module', included: true, watched: false },
-            { pattern: 'node_modules/pdfjs-dist/build/pdf.worker.min.mjs', type: 'module', included: true, watched: false },
-            { pattern: 'node_modules/pdfjs-dist/web/pdf_viewer.mjs', type: 'module', included: true, watched: false },
+            { pattern: 'node_modules/pdfjs-dist/legacy/build/pdf.min.mjs', type: 'module', included: true, watched: false },
+            { pattern: 'node_modules/pdfjs-dist/legacy/build/pdf.worker.min.mjs', type: 'module', included: true, watched: false },
+            { pattern: 'node_modules/pdfjs-dist/legacy/web/pdf_viewer.mjs', type: 'module', included: true, watched: false },
 
             {
                 pattern: 'node_modules/@angular/material/prebuilt-themes/indigo-pink.css',
@@ -37,8 +37,8 @@ module.exports = function (config) {
         frameworks: ['jasmine-ajax', 'jasmine', '@angular-devkit/build-angular'],
 
         proxies: {
-            '/pdf.worker.min.mjs': '/base/node_modules/pdfjs-dist/build/pdf.min.mjs',
-            '/pdf.worker.js': '/base/node_modules/pdfjs-dist/build/pdf.worker.mjs',
+            '/pdf.worker.min.mjs': '/base/node_modules/pdfjs-dist/legacy/build/pdf.min.mjs',
+            '/pdf.worker.js': '/base/node_modules/pdfjs-dist/legacy/build/pdf.worker.mjs',
             '/fake-url-file.png': '/base/lib/core/src/lib/assets/images/logo.png',
             '/logo.png': '/base/lib/core/src/lib/assets/images/logo.png',
             '/alfresco-logo.svg': '/base/lib/core/src/lib/assets/images/alfresco-logo.svg',