diff --git a/test/worker/application_worker.js b/test/worker/application_worker.js
index 2b1bc425..0e73dffa 100644
--- a/test/worker/application_worker.js
+++ b/test/worker/application_worker.js
@@ -11,6 +11,9 @@ tryTests('Application Worker', tests, {
 function tests() {
 
   it('Should support loading OpenPGP.js from inside a Web Worker', async function() {
+    if (/Edge/.test(navigator.userAgent)) {
+      this.skip(); // Old Edge doesn't support crypto.getRandomValues inside a Worker.
+    }
     try {
       eval('(async function() {})');
     } catch (e) {