diff --git a/src/ethereum_test_tools/vm/opcode.py b/src/ethereum_test_tools/vm/opcode.py
index 51c3ee1201..4edd4d7c21 100644
--- a/src/ethereum_test_tools/vm/opcode.py
+++ b/src/ethereum_test_tools/vm/opcode.py
@@ -70,7 +70,7 @@ def __eq__(self, other):
         """
         if isinstance(other, OpcodeMacroBase):
             return self._name_ == other._name_
-        return NotImplemented
+        return False
 
 
 class Opcode(OpcodeMacroBase):