diff --git a/MatterControlLib/PrinterCommunication/Drivers/Emulator/Emulator.cs b/MatterControlLib/PrinterCommunication/Drivers/Emulator/Emulator.cs
index 844718cf3..b7743b25e 100644
--- a/MatterControlLib/PrinterCommunication/Drivers/Emulator/Emulator.cs
+++ b/MatterControlLib/PrinterCommunication/Drivers/Emulator/Emulator.cs
@@ -92,6 +92,7 @@ namespace MatterHackers.PrinterEmulator
 
 		public event EventHandler ZPositionChanged;
 		public event EventHandler EPositionChanged;
+		public event EventHandler<string> RecievedInstruction;
 
 		// Instance reference allows test to access the most recently initialized emulator
 		public static Emulator Instance { get; private set; }
@@ -178,6 +179,8 @@ namespace MatterHackers.PrinterEmulator
 		{
 			try
 			{
+				RecievedInstruction?.Invoke(this, inCommand);
+
 				// Remove line returns
 				var commandNoNl = inCommand.Split('\n')[0]; // strip of the trailing cr (\n)
 				var command = ParseChecksumLine(commandNoNl);
diff --git a/Tests/MatterControl.AutomationTests/ReSliceTests.cs b/Tests/MatterControl.AutomationTests/ReSliceTests.cs
index 198e5defd..79b0e8540 100644
--- a/Tests/MatterControl.AutomationTests/ReSliceTests.cs
+++ b/Tests/MatterControl.AutomationTests/ReSliceTests.cs
@@ -72,6 +72,14 @@ namespace MatterHackers.MatterControl.Tests.Automation
 					double lastAbsoluteEPostion = 0;
 					double largestAbsoluteEPosition = 0;
 					double largestRetraction = 0;
+					emulator.RecievedInstruction += (e, s) =>
+					{
+						if(s.Contains("G92"))
+						{
+							int a = 0;
+						}
+					};
+
 					emulator.EPositionChanged += (e, s) =>
 					{
 						largestAbsoluteEPosition = Math.Max(largestAbsoluteEPosition, emulator.CurrentExtruder.AbsoluteEPosition);