diff --git a/src/extensions/scratch3_ev3/index.js b/src/extensions/scratch3_ev3/index.js
index 801ea25d0..016919f8c 100644
--- a/src/extensions/scratch3_ev3/index.js
+++ b/src/extensions/scratch3_ev3/index.js
@@ -187,7 +187,7 @@ class EV3 {
     }
 
     get distance () {
-        if (!this.connected) return;
+        if (!this.connected) return 0;
 
         // https://shop.lego.com/en-US/EV3-Ultrasonic-Sensor-45504
         // Measures distances between one and 250 cm (one to 100 in.)
@@ -199,19 +199,18 @@ class EV3 {
     }
 
     get brightness () {
-        if (!this.connected) return;
+        if (!this.connected) return 0;
 
         return this._sensors.brightness;
     }
 
     getMotorPosition (port) {
         if (!this.connected) return;
+
         return this._motorPositions[port];
-        // TODO: read motor position data
-        log.info(`return motor ${args} position`);
     }
 
-    isButtonPressed (args) {
+    isButtonPressed (/* args */) {
         if (!this.connected) return;
 
         return this._sensors.button;
@@ -545,7 +544,6 @@ class EV3 {
         if (this._sensorPorts.length === 0) {
             // SENSOR LIST
             // JAABAAIefn5+fn5+fn5+fn5+fn5+Bwd+fn5+fn5+fn5+fn5+fgA=
-            // [36, 0, 1, 0, 2, 30, 126, 126, 126, 126, 126, 126, 126, 126, 126, 126, 126, 126, 126, 126, 126, 7, 7, 126, 126, 126, 126, 126, 126, 126, 126, 126, 126, 126, 126, 126, 126, 0]
             log.info(`device array: ${array}`);
             this._sensorPorts[0] = EV_DEVICE_TYPES[array[5]];
             this._sensorPorts[1] = EV_DEVICE_TYPES[array[6]];
@@ -563,7 +561,7 @@ class EV3 {
             // TODO: window?
             this._pollingIntervalID = window.setInterval(this._getSessionData.bind(this), 100);
         } else {
-            //log.info(`received compound command result: ${array}`);
+            // log.info(`received compound command result: ${array}`);
             let offset = 5;
             for (let i = 0; i < this._sensorPorts.length; i++) {
                 if (this._sensorPorts[i] !== 'none') {
diff --git a/src/util/jsonrpc-web-socket.js b/src/util/jsonrpc-web-socket.js
index c06a269b5..ac118cdff 100644
--- a/src/util/jsonrpc-web-socket.js
+++ b/src/util/jsonrpc-web-socket.js
@@ -1,5 +1,5 @@
 const JSONRPC = require('./jsonrpc');
-const log = require('../util/log');
+// const log = require('../util/log');
 
 class JSONRPCWebSocket extends JSONRPC {
     constructor (webSocket) {