diff --git a/lib/core/karma.conf.js b/lib/core/karma.conf.js
index 574abb3a76..722039ced6 100644
--- a/lib/core/karma.conf.js
+++ b/lib/core/karma.conf.js
@@ -36,8 +36,8 @@ module.exports = function (config) {
         frameworks: ['jasmine-ajax', 'jasmine', '@angular-devkit/build-angular'],
 
         proxies: {
-            '/pdf.worker.min.js': '/base/node_modules/pdfjs-dist/build/pdf.worker.min.js',
-            '/pdf.worker.js': '/base/node_modules/pdfjs-dist/build/pdf.worker.js',
+            '/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',
             '/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',
@@ -106,6 +106,7 @@ module.exports = function (config) {
                 base: 'ChromeHeadless',
                 flags: [
                   '--no-sandbox',
+                  '--headless',
                   '--disable-gpu',
                   '--disable-translate',
                   '--disable-extensions'
diff --git a/lib/core/src/lib/viewer/components/pdf-viewer/pdf-viewer.component.ts b/lib/core/src/lib/viewer/components/pdf-viewer/pdf-viewer.component.ts
index b35246958f..e47f4ffb78 100644
--- a/lib/core/src/lib/viewer/components/pdf-viewer/pdf-viewer.component.ts
+++ b/lib/core/src/lib/viewer/components/pdf-viewer/pdf-viewer.component.ts
@@ -215,7 +215,7 @@ export class PdfViewerComponent implements OnChanges, OnDestroy {
 
     executePdf(pdfOptions: any) {
         //eslint-disable-next-line
-        console.log('Worker', pdfjsLib.GlobalWorkerOptions.workerSrc);
+        console.log('Worker', (window as any).pdfWorkerSrc);
 
         this.loadingTask = pdfjsLib.getDocument(pdfOptions);
         //eslint-disable-next-line
@@ -253,8 +253,7 @@ export class PdfViewerComponent implements OnChanges, OnDestroy {
                 viewer,
                 renderingQueue: this.renderingQueueServices,
                 eventBus: this.eventBus,
-                annotationMode: AnnotationMode.DISABLE,
-                textLayerMode: 1
+                annotationMode: AnnotationMode.DISABLE
             });
 
             // cspell: disable-next
@@ -262,7 +261,11 @@ export class PdfViewerComponent implements OnChanges, OnDestroy {
             // cspell: disable-next
             this.eventBus.on('pagesloaded', this.onPagesLoaded);
             // cspell: disable-next
-            this.eventBus.on('textlayerrendered', this.onPageRendered);
+            this.eventBus.on('textlayerrendered', () => {
+                //eslint-disable-next-line
+                console.log('EVENT textlayerrendered');
+                this.onPageRendered();
+            });
 
             this.renderingQueueServices.setViewer(this.pdfViewer);
             this.pdfViewer.setDocument(pdfDocument);
diff --git a/lib/process-services-cloud/karma.conf.js b/lib/process-services-cloud/karma.conf.js
index 1c50d44c7e..2181436f36 100644
--- a/lib/process-services-cloud/karma.conf.js
+++ b/lib/process-services-cloud/karma.conf.js
@@ -8,9 +8,9 @@ module.exports = function (config) {
     config.set({
         basePath: '../../',
         files: [
-            { pattern: 'node_modules/pdfjs-dist/build/pdf.js', included: true, watched: false },
-            { pattern: 'node_modules/pdfjs-dist/build/pdf.worker.js', included: true, watched: false },
-            { pattern: 'node_modules/pdfjs-dist/web/pdf_viewer.js', included: true, watched: false },
+            { 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/@angular/material/prebuilt-themes/indigo-pink.css',
                 included: true,
diff --git a/lib/process-services/karma.conf.js b/lib/process-services/karma.conf.js
index 039f4ed155..2bed5379c5 100644
--- a/lib/process-services/karma.conf.js
+++ b/lib/process-services/karma.conf.js
@@ -8,9 +8,9 @@ module.exports = function (config) {
     config.set({
         basePath: '../../',
         files: [
-            { pattern: 'node_modules/pdfjs-dist/build/pdf.js', included: true, watched: false },
-            { pattern: 'node_modules/pdfjs-dist/build/pdf.worker.js', included: true, watched: false },
-            { pattern: 'node_modules/pdfjs-dist/web/pdf_viewer.js', included: true, watched: false },
+            { 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/@angular/material/prebuilt-themes/indigo-pink.css',
                 included: true,