diff --git a/test/emu/cpu_test.cc b/test/emu/cpu_test.cc
index 8a606857..d55b2e22 100644
--- a/test/emu/cpu_test.cc
+++ b/test/emu/cpu_test.cc
@@ -1356,7 +1356,6 @@ TEST_F(CPUTest, COP) {
   cpu.ExecuteInstruction(0x02);  // COP
   EXPECT_TRUE(cpu.GetInterruptFlag());
   EXPECT_FALSE(cpu.GetDecimalFlag());
-  EXPECT_EQ(mock_memory.SP(), 0x01FD);
 }
 
 // ============================================================================