diff --git a/InstructionSets/x86/Implementation/PerformImplementation.hpp b/InstructionSets/x86/Implementation/PerformImplementation.hpp
index c4d2e00a2..fdab87e8c 100644
--- a/InstructionSets/x86/Implementation/PerformImplementation.hpp
+++ b/InstructionSets/x86/Implementation/PerformImplementation.hpp
@@ -1452,6 +1452,10 @@ template <
 		case Operation::JMPrel:	jcc(true);																		return;
 		case Operation::JMPabs:	Primitive::jump_absolute(destination(), flow_controller);						return;
 		case Operation::JMPfar:	Primitive::jump_far<model>(instruction, flow_controller, registers, memory);	return;
+		case Operation::JCXZ:
+			// TODO: use ECX rather than CX if address size is 32-bit.
+			jcc(!registers.cx());
+		return;
 
 		case Operation::IRET:		Primitive::iret(registers, flow_controller, memory, status);			return;
 		case Operation::RETnear:	Primitive::ret_near(instruction, registers, flow_controller, memory);	return;
diff --git a/OSBindings/Mac/Clock SignalTests/8088Tests.mm b/OSBindings/Mac/Clock SignalTests/8088Tests.mm
index f4228ca3b..85f8da4c9 100644
--- a/OSBindings/Mac/Clock SignalTests/8088Tests.mm	
+++ b/OSBindings/Mac/Clock SignalTests/8088Tests.mm	
@@ -375,18 +375,14 @@ struct FailedExecution {
 
 		@"C3.json.gz",	@"C2.json.gz",	// near RET
 		@"CB.json.gz",	@"CA.json.gz",	// far RET
-*/
-		// relative JMP
-		@"EB.json.gz",		@"E9.json.gz",
 
-		// far JMP
-		@"EA.josn.gz",		@"FF.5.json.gz",
+		@"EB.json.gz",	@"E9.json.gz",		// relative JMP
+		@"EA.josn.gz",	@"FF.5.json.gz",	// far JMP
 
 		@"FF.4.json.gz",	// absolute JMP
-
+*/
+		@"E3.json.gz",		// JCXZ
 /*
-		// TODO: JCXZ
-
 		// INTO
 		@"CE.json.gz",