diff --git a/sys/amd64/vmm/vmm_instruction_emul.c b/sys/amd64/vmm/vmm_instruction_emul.c
--- a/sys/amd64/vmm/vmm_instruction_emul.c
+++ b/sys/amd64/vmm/vmm_instruction_emul.c
@@ -236,6 +236,12 @@
 		.op_byte = 0x8F,
 		.op_type = VIE_OP_TYPE_POP,
 	},
+	[0xF6] = {
+		/* XXX Group 3 extended opcode - not just TEST */
+		.op_byte = 0xF6,
+		.op_type = VIE_OP_TYPE_TEST,
+		.op_flags = VIE_OP_F_IMM8,
+	},
 	[0xF7] = {
 		/* XXX Group 3 extended opcode - not just TEST */
 		.op_byte = 0xF7,
@@ -1284,6 +1290,12 @@
 	error = EINVAL;
 
 	switch (vie->op.op_byte) {
+	case 0xF6:
+		/*
+		 * F6 /0		test r/m8, imm8
+		 */
+		size = 1;	/* override for byte operation */
+		/* FALLTHROUGH */
 	case 0xF7:
 		/*
 		 * F7 /0		test r/m16, imm16