diff --git a/test/GCode.test.js b/test/GCode.test.js
index 21b8bdc..8cc7308 100755
--- a/test/GCode.test.js
+++ b/test/GCode.test.js
@@ -22,7 +22,7 @@ test('G28 ist ein GCode Command', () => {
     })
 
 
-    test("ReadPosition -> G1", () => {
+    test("ReadPosition -> G1 -> telnetSender", () => {
 
         const L1 = 300;
         const L2 = 300;
@@ -46,4 +46,28 @@ test('G28 ist ein GCode Command', () => {
     });
 
 
+    test("ReadPosition -> G1 -> telnetSender -- empty", () => {
+
+        const L1 = 300;
+        const L2 = 300;
+        const L3 = 20;
+
+        const robot = new Robot(L1, L2, L3)
+
+        var telnetSender1 = new TenetSender(urlGRBL = "test.test",   maxSpeedF = 2300, xAxisGrbl = "x", yAxisGrbl = "y", zAxisGrbl = "z");
+        var telnetSender2 = new TenetSender(urlGRBL = "test.test", maxSpeedF = 5000, xAxisGrbl = "x", yAxisGrbl = null, zAxisGrbl = null);
+        var telnetSender3 = new TenetSender(urlGRBL = "test.test",   maxSpeedF = 5000, xAxisGrbl = "a", yAxisGrbl = "y", zAxisGrbl = "b");
+
+        robot.cmdReceivers.push(telnetSender1);
+        robot.cmdReceivers.push(telnetSender2);
+        robot.cmdReceivers.push(telnetSender3);
+
+        
+        GCode.receiveGCode(robot,"G1 x120");
+
+        expect(telnetSender2.tSocket.written.toString().length).toBeGreaterThan(2)
+        expect(telnetSender3.tSocket.written.toString().length).toBe(0)
+    });
+
+