diff --git a/M6502/HarteTest_6502/checker_t.h b/M6502/HarteTest_6502/checker_t.h
index ce53ad2..e77370a 100644
--- a/M6502/HarteTest_6502/checker_t.h
+++ b/M6502/HarteTest_6502/checker_t.h
@@ -84,7 +84,7 @@ public:
     [[nodiscard]] constexpr auto cycles() const noexcept { return m_cycles; }
     [[nodiscard]] constexpr auto valid() const noexcept { return m_valid; }
     [[nodiscard]] constexpr auto invalid() const noexcept { return !valid(); }
-    [[nodiscard]] constexpr auto unimplemented() const noexcept { return invalid() && m_cycle_count_mismatch && (cycles() == 1); }
+    [[nodiscard]] constexpr auto unimplemented() const noexcept { return invalid() && m_cycle_count_mismatch && (cycles() == 0); }
     [[nodiscard]] constexpr auto implemented() const noexcept { return !unimplemented(); }
 
     [[nodiscard]] constexpr const auto& messages() const noexcept { return m_messages; }
diff --git a/M6502/src/mos6502.cpp b/M6502/src/mos6502.cpp
index 7505436..d5e125e 100644
--- a/M6502/src/mos6502.cpp
+++ b/M6502/src/mos6502.cpp
@@ -24,7 +24,6 @@ int EightBit::MOS6502::step() noexcept {
 	resetCycles();
 	ExecutingInstruction.fire(*this);
 	if (LIKELY(powered())) {
-		tick();
 		if (UNLIKELY(lowered(SO())))
 			handleSO();
 		if (LIKELY(raised(RDY()))) {