diff --git a/test/parser.js b/test/parser.js
index f98bc1bb..e4f857f2 100644
--- a/test/parser.js
+++ b/test/parser.js
@@ -62,6 +62,11 @@ describe('parser', function () {
           .to.eql({ type: 'message', data: 'aaa' });
       });
 
+      it('should encode a message packet coercing to string', function () {
+        expect(decode(encode({ type: 'message', data: 1 })))
+          .to.eql({ type: 'message', data: '1' });
+      });
+
       it('should encode an upgrade packet', function () {
         expect(decode(encode({ type: 'upgrade' })))
           .to.eql({ type: 'upgrade' });