diff --git a/InstructionSets/x86/Implementation/PerformImplementation.hpp b/InstructionSets/x86/Implementation/PerformImplementation.hpp
index 8cedf3767..93a1ab80f 100644
--- a/InstructionSets/x86/Implementation/PerformImplementation.hpp
+++ b/InstructionSets/x86/Implementation/PerformImplementation.hpp
@@ -476,6 +476,32 @@ void sub(IntT &destination, IntT source, Status &status) {
 	}
 }
 
+template <typename IntT>
+void test(IntT &destination, IntT source, Status &status) {
+	/*
+		TEMP ← SRC1 AND SRC2;
+		SF ← MSB(TEMP);
+		IF TEMP = 0
+			THEN ZF ← 0;
+			ELSE ZF ← 1;
+		FI:
+		PF ← BitwiseXNOR(TEMP[0:7]);
+		CF ← 0;
+		OF ← 0;
+	*/
+	/*
+		The OF and CF flags are cleared to 0.
+		The SF, ZF, and PF flags are set according to the result (see the “Operation” section above).
+		The state of the AF flag is undefined.
+	*/
+	const IntT result = destination & source;
+
+	status.sign = result & top_bit<IntT>();
+	status.zero = result;
+	status.carry = status.overflow = 0;
+	status.parity = result;
+}
+
 template <typename IntT>
 void mul(IntT &destination_high, IntT &destination_low, IntT source, Status &status) {
 	/*
@@ -938,6 +964,7 @@ template <
 		case Operation::SBB:	Primitive::sbb(destination(), source(), status);			break;
 		case Operation::SUB:	Primitive::sub<true>(destination(), source(), status);		break;
 		case Operation::CMP:	Primitive::sub<false>(destination(), source(), status);		break;
+		case Operation::TEST:	Primitive::test(destination(), source(), status);			break;
 
 		// TODO: all the below could call a common registers getter?
 		case Operation::MUL:
diff --git a/OSBindings/Mac/Clock SignalTests/8088Tests.mm b/OSBindings/Mac/Clock SignalTests/8088Tests.mm
index 095bb4dbf..8fe9cb536 100644
--- a/OSBindings/Mac/Clock SignalTests/8088Tests.mm	
+++ b/OSBindings/Mac/Clock SignalTests/8088Tests.mm	
@@ -413,11 +413,15 @@ struct FailedExecution {
 */
 
 		// CMP
-		@"38.json.gz",	@"39.json.gz",	@"3A.json.gz",
-		@"3B.json.gz",	@"3C.json.gz",	@"3D.json.gz",
-		@"80.7.json.gz",	@"81.7.json.gz",	@"83.7.json.gz",
+//		@"38.json.gz",	@"39.json.gz",	@"3A.json.gz",
+//		@"3B.json.gz",	@"3C.json.gz",	@"3D.json.gz",
+//		@"80.7.json.gz",	@"81.7.json.gz",	@"83.7.json.gz",
+
+		// TEST
+		@"84.json.gz",	@"85.json.gz",
+		@"A8.json.gz",	@"A9.json.gz",
+		@"F6.0.json.gz",	@"F7.0.json.gz",
 
-		// TODO: CMP, TEST
 		// TODO: XCHG, XLAT
 		// TODO: SALC, SETMO, SETMOC