diff --git a/tests/mos6502.arith.c b/tests/mos6502.arith.c
index 867b4aa..4e654fc 100644
--- a/tests/mos6502.arith.c
+++ b/tests/mos6502.arith.c
@@ -28,8 +28,8 @@ Test(mos6502_arith, cmp)
     cpu->A = 3;
     mos6502_handle_cmp(cpu, 4);
     cr_assert_eq(cpu->P & MOS_CARRY, 0);
-    cr_assert_eq(cpu->P & MOS_NEGATIVE, 0);
-    cr_assert_eq(cpu->P & MOS_ZERO, MOS_ZERO);
+    cr_assert_eq(cpu->P & MOS_NEGATIVE, MOS_NEGATIVE);
+    cr_assert_eq(cpu->P & MOS_ZERO, 0);
 
     cpu->A = 192;
     mos6502_handle_cmp(cpu, 3);