diff --git a/src/core/worker.js b/src/core/worker.js
index 5ec40561d..04fc03abe 100644
--- a/src/core/worker.js
+++ b/src/core/worker.js
@@ -75,9 +75,8 @@ class WorkerMessageHandler {
       }
       testMessageProcessed = true;
 
-      // Ensure that `TypedArray`s can be sent to the worker,
-      // and that `postMessage` transfers are supported.
-      handler.send("test", data instanceof Uint8Array && data[0] === 255);
+      // Ensure that `TypedArray`s can be sent to the worker.
+      handler.send("test", data instanceof Uint8Array);
     });
 
     handler.on("configure", function wphConfigure(data) {
diff --git a/src/display/api.js b/src/display/api.js
index b743a0ec0..df5ad2a8b 100644
--- a/src/display/api.js
+++ b/src/display/api.js
@@ -2167,16 +2167,9 @@ class PDFWorker {
         });
 
         const sendTest = () => {
-          const testObj = new Uint8Array([255]);
-          // Some versions of Opera throw a DATA_CLONE_ERR on serializing the
-          // typed array. Also, checking if we can use transfers.
-          try {
-            messageHandler.send("test", testObj, [testObj.buffer]);
-          } catch (ex) {
-            warn("Cannot use postMessage transfers.");
-            testObj[0] = 0;
-            messageHandler.send("test", testObj);
-          }
+          const testObj = new Uint8Array();
+          // Ensure that we can use `postMessage` transfers.
+          messageHandler.send("test", testObj, [testObj.buffer]);
         };
 
         // It might take time for the worker to initialize. We will try to send