diff --git a/tests/test.websock.js b/tests/test.websock.js
index 53145b360..ab09f4508 100644
--- a/tests/test.websock.js
+++ b/tests/test.websock.js
@@ -261,20 +261,15 @@ describe('Websock', function () {
             });
             it('should implicitly split a large buffer', function () {
                 let str = '';
-                for (let i = 0;i <= bufferSize/5;i++) {
-                    str += '\x12\x34\x56\x78\x90';
+                let expected = [];
+                for (let i = 0;i < bufferSize * 3;i++) {
+                    let byte = Math.random() * 0xff;
+                    str += String.fromCharCode(byte);
+                    expected.push(byte);
                 }
 
                 sock.sQpushString(str);
-
-                let expected = [];
-                for (let i = 0;i < bufferSize/5;i++) {
-                    expected.push(0x12);
-                    expected.push(0x34);
-                    expected.push(0x56);
-                    expected.push(0x78);
-                    expected.push(0x90);
-                }
+                sock.flush();
 
                 expect(sock).to.have.sent(new Uint8Array(expected));
             });
@@ -308,24 +303,15 @@ describe('Websock', function () {
             });
             it('should implicitly split a large buffer', function () {
                 let buffer = [];
-                for (let i = 0;i <= bufferSize/5;i++) {
-                    buffer.push(0x12);
-                    buffer.push(0x34);
-                    buffer.push(0x56);
-                    buffer.push(0x78);
-                    buffer.push(0x90);
+                let expected = [];
+                for (let i = 0;i < bufferSize * 3;i++) {
+                    let byte = Math.random() * 0xff;
+                    buffer.push(byte);
+                    expected.push(byte);
                 }
 
                 sock.sQpushBytes(new Uint8Array(buffer));
-
-                let expected = [];
-                for (let i = 0;i < bufferSize/5;i++) {
-                    expected.push(0x12);
-                    expected.push(0x34);
-                    expected.push(0x56);
-                    expected.push(0x78);
-                    expected.push(0x90);
-                }
+                sock.flush();
 
                 expect(sock).to.have.sent(new Uint8Array(expected));
             });