diff --git a/testing/psbt.py b/testing/psbt.py
index 13035658..ca556d7d 100644
--- a/testing/psbt.py
+++ b/testing/psbt.py
@@ -135,7 +135,8 @@ class BasicPSBTInput(PSBTSection):
 
     def __eq__(a, b):
         if a.sighash != b.sighash:
-            if a.sighash is not None and b.sighash is not None:
+            # no sighash == SIGHASH_ALL
+            if {a.sighash, b.sighash} != {None, 1}:
                 return False
 
         rv = a.utxo == b.utxo and \
diff --git a/testing/test_multisig.py b/testing/test_multisig.py
index fafa0fdd..8600c6d6 100644
--- a/testing/test_multisig.py
+++ b/testing/test_multisig.py
@@ -2034,7 +2034,7 @@ def test_iss6743(repeat, set_seed_words, sim_execfile, try_sign):
     # sign a multisig, with xpubs in globals
     _, out_psbt = try_sign(psbt_b4, accept=True, accept_ms_import=True)
     assert out_psbt != psbt_wrong
-    assert out_psbt == psbt_right
+    assert BasicPSBT().parse(out_psbt) == BasicPSBT().parse(psbt_right)
 
     open('debug/i6.psbt', 'wt').write(out_psbt.hex())