diff --git a/bip-0374/gen_test_vectors.py b/bip-0374/gen_test_vectors.py
index 19625cca..792a59a4 100755
--- a/bip-0374/gen_test_vectors.py
+++ b/bip-0374/gen_test_vectors.py
@@ -111,7 +111,7 @@ def gen_all_verify_proof_vectors(f):
     # modifying message should fail (flip one bit)
     msg_damage_pos = random_scalar_int(idx, "damage_pos") % 256
     msg_damaged = list(msg)
-    msg_damaged[proof_damage_pos // 8] ^= (1 << (msg_damage_pos % 8))
+    msg_damaged[msg_damage_pos // 8] ^= (1 << (msg_damage_pos % 8))
     msg_damaged = bytes(msg_damaged)
     writer.writerow((idx, G.to_bytes_compressed().hex(), A.to_bytes_compressed().hex(), B.to_bytes_compressed().hex(),
                      C.to_bytes_compressed().hex(), proof.hex(), msg_damaged.hex(), "FALSE", f"Tampered message (random bit-flip)"))
diff --git a/bip-0374/run_test_vectors.py b/bip-0374/run_test_vectors.py
index 6c7e12ec..53e5e2dc 100755
--- a/bip-0374/run_test_vectors.py
+++ b/bip-0374/run_test_vectors.py
@@ -20,7 +20,7 @@ print("----- Proof generation test vectors -----")
 print("-----------------------------------------")
 with open(FILENAME_GENERATE_PROOF_TEST, newline='') as csvfile:
     reader = csv.reader(csvfile)
-    reader.__next__()
+    next(reader)
     for row in reader:
         (index, point_G_hex, seckey_a_hex, point_B_hex, aux_rand_hex, msg_hex, result_str, comment) = row
         print(seckey_a_hex)
@@ -48,7 +48,7 @@ print("----- Proof verification test vectors -----")
 print("-------------------------------------------")
 with open(FILENAME_VERIFY_PROOF_TEST, newline='') as csvfile:
     reader = csv.reader(csvfile)
-    reader.__next__()
+    next(reader)
     for row in reader:
         (index, point_G_hex, point_A_hex, point_B_hex, point_C_hex, proof_hex, msg_hex, result_success, comment) = row
         G = GE() if point_G_hex == 'INFINITY' else GE.from_bytes(bytes.fromhex(point_G_hex))
diff --git a/bip-0374/test_vectors_verify_proof.csv b/bip-0374/test_vectors_verify_proof.csv
index 5699fc80..8076e813 100644
--- a/bip-0374/test_vectors_verify_proof.csv
+++ b/bip-0374/test_vectors_verify_proof.csv
@@ -13,4 +13,4 @@ index,point_G,point_A,point_B,point_C,proof,message,result_success,comment
 11,0279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798,03d9a98624c0c74fc7eebd39ed84175f80d03c774908e75ca737a0745d1c64e20a,03611410561c35dae13135e4ad8094baac9bbcf2f4e18498181a8ff8a6d43be9d9,021cb81121a00f89769903305a367ad3cc02d5b402b12c026e06ac94bde28cd608,78a5544afa75bf152653fe55fb76926f2f65131bf090972a0b0b37d310c28a6bde0e7bfacc10ac12d36f55316ba134b6ba0b844a65ae05cad53c0b296c6639bb,22616bb5fb2d7c68270f305122f2a09e833239c4b1c9a04e285119fb606ac794,FALSE,Swapped points case 4
 12,0279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798,03d9a98624c0c74fc7eebd39ed84175f80d03c774908e75ca737a0745d1c64e20a,021cb81121a00f89769903305a367ad3cc02d5b402b12c026e06ac94bde28cd608,03611410561c35dae13135e4ad8094baac9bbcf2f4e18498181a8ff8a6d43be9d9,78a5544afa75bf152653fe55fb76926f2f65131bf090972a0b0b37d310c28a6bde0e7bfacc10ac12d36f55316ba134b6ba0b844a65ae05cad53c0b296c6639bb,22616bb5fb2d7c68270f305122f2a09e833239c4b1c9a04e285119fb606ac794,FALSE,Swapped points case 5
 13,0279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798,03611410561c35dae13135e4ad8094baac9bbcf2f4e18498181a8ff8a6d43be9d9,021cb81121a00f89769903305a367ad3cc02d5b402b12c026e06ac94bde28cd608,03d9a98624c0c74fc7eebd39ed84175f80d03c774908e75ca737a0745d1c64e20a,78a5544afa75bf152653fe55fb76926f2f65131ff090972a0b0b37d310c28a6bde0e7bfacc10ac12d36f55316ba134b6ba0b844a65ae05cad53c0b296c6639bb,22616bb5fb2d7c68270f305122f2a09e833239c4b1c9a04e285119fb606ac794,FALSE,Tampered proof (random bit-flip)
-14,0279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798,03611410561c35dae13135e4ad8094baac9bbcf2f4e18498181a8ff8a6d43be9d9,021cb81121a00f89769903305a367ad3cc02d5b402b12c026e06ac94bde28cd608,03d9a98624c0c74fc7eebd39ed84175f80d03c774908e75ca737a0745d1c64e20a,78a5544afa75bf152653fe55fb76926f2f65131bf090972a0b0b37d310c28a6bde0e7bfacc10ac12d36f55316ba134b6ba0b844a65ae05cad53c0b296c6639bb,22616bb5fb2d7c68270f305122f2a09e83323984b1c9a04e285119fb606ac794,FALSE,Tampered message (random bit-flip)
+14,0279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798,03611410561c35dae13135e4ad8094baac9bbcf2f4e18498181a8ff8a6d43be9d9,021cb81121a00f89769903305a367ad3cc02d5b402b12c026e06ac94bde28cd608,03d9a98624c0c74fc7eebd39ed84175f80d03c774908e75ca737a0745d1c64e20a,78a5544afa75bf152653fe55fb76926f2f65131bf090972a0b0b37d310c28a6bde0e7bfacc10ac12d36f55316ba134b6ba0b844a65ae05cad53c0b296c6639bb,22616bb5fb6d7c68270f305122f2a09e833239c4b1c9a04e285119fb606ac794,FALSE,Tampered message (random bit-flip)