diff --git a/javascript/JZZ.js b/javascript/JZZ.js
index 73f2c4b..2e78ce4 100644
--- a/javascript/JZZ.js
+++ b/javascript/JZZ.js
@@ -631,13 +631,13 @@
     this._pause();
     document.addEventListener('jazz-midi-msg', eventHandle);
     try { document.dispatchEvent(new Event('jazz-midi')); } catch (err) {}
-    setTimeout(function() { if (!inst) self._crash(); }, 0);
+    _schedule(function() { if (!inst) self._crash(); });
   }
 
   function _zeroBreak() {
     this._pause();
     var self = this;
-    setTimeout(function() { self._crash(); }, 0);
+    _schedule(function() { self._crash(); });
   }
 
   function _filterEngines(opt) {
@@ -979,12 +979,12 @@
     _engine._watch = function() {
       _engine._access.onstatechange = function() {
         watcher = true;
-        setTimeout(function() {
+        _schedule(function() {
           if (watcher) {
             _engine._refresh();
             watcher = false;
           }
-        }, 0);
+        });
       };
     };
     _engine._unwatch = function() {
@@ -1016,9 +1016,9 @@
     _engine._refresh = function(client) {
       _engine.refreshClients.push(client);
       client._pause();
-      setTimeout(function() {
+      _schedule(function() {
         document.dispatchEvent(new CustomEvent('jazz-midi', { detail: ['refresh'] }));
-      }, 0);
+      });
     };
     function _closeAll() {
       for (var i = 0; i < this.clients.length; i++) this._close(this.clients[i]);
diff --git a/package.json b/package.json
index 784870f..6132771 100644
--- a/package.json
+++ b/package.json
@@ -21,7 +21,7 @@
   },
   "devDependencies": {
     "coveralls": "^3.0.6",
-    "eslint": "^6.2.1",
+    "eslint": "^6.2.2",
     "grunt": "^1.0.4",
     "grunt-contrib-jshint": "^2.1.0",
     "grunt-contrib-uglify": "^4.0.1",
diff --git a/test/tests.js b/test/tests.js
index d1e1112..d34935d 100644
--- a/test/tests.js
+++ b/test/tests.js
@@ -114,7 +114,7 @@ module.exports = function(JZZ, PARAMS, DRIVER) {
         JZZ.lib.registerMidiOut('Widget MIDI-Out', widget2); // should ignore second call
         port2 = engine.openMidiOut('Widget MIDI-Out');
         port2.connect(port1);
-        port2.and(function() { assert.equal(this.connected(), 1); this.noteOn(0, 60); });
+        port2.and(function() { assert.equal(this.connected(), 1); this.send([]); this.noteOn(0, 60); });
       });
     },
 
@@ -158,7 +158,7 @@ module.exports = function(JZZ, PARAMS, DRIVER) {
         };
         port1 = engine.openMidiOut(name1);
         port2 = engine.openMidiOut(name2);
-        port2.and(function() { this.noteOn(0, 60, 127); });
+        port2.and(function() { this.send([]); this.noteOn(0, 60, 127); });
       });
     },