Error in test assertion

test1.py

@@ -10,7 +10,7 @@ for test in range(10000):
     assert i1 == i2 or \
         (i1 < i2 and not (i1 > i2)) or \
         (i1 > i2 and not (i1 < i2)) or \
-        int(i1) & int(i2) == Serial.modulus >> 1
+        int(i1) ^ int(i2) == Serial.modulus >> 1
     
     step = [i1, i2]
     wrap = find_intermediate(i1, i2)