diff --git a/test/functional/feature_blocksign.py b/test/functional/feature_blocksign.py
index e678f020c3..b3603bb5c5 100755
--- a/test/functional/feature_blocksign.py
+++ b/test/functional/feature_blocksign.py
@@ -23,7 +23,7 @@ def make_signblockscript(num_nodes, required_signers, keys):
     for i in range(num_nodes):
         k = keys[i]
         script += "41"
-        script += codecs.encode(k.get_pubkey(), 'hex_codec').decode("utf-8")
+        script += k.get_pubkey().get_bytes().hex()
     script += "{}".format(50 + num_nodes) # num keys
     script += "ae" # OP_CHECKMULTISIG
     print('signblockscript', script)
@@ -55,13 +55,13 @@ class BlockSignTest(BitcoinTestFramework):
         self.keys = []
         self.wifs = []
         for i in range(num_keys):
-            k = key.CECKey()
+            k = key.ECKey()
             pk_bytes = hashlib.sha256(str(random.getrandbits(256)).encode('utf-8')).digest()
-            k.set_secretbytes(pk_bytes)
+            #k.set_secretbytes(pk_bytes)
+            k.set(pk_bytes, True)
             w = wif(pk_bytes)
-            print("generated key {}: \n pub: {}\n  wif: {}".format(i+1,
-                codecs.encode(k.get_pubkey(), 'hex_codec').decode("utf-8"),
-                w))
+            print("generated key {}: \n pub: {}\n  wif: {}".format(
+                i+1, k.get_pubkey().get_bytes().hex(), w))
             self.keys.append(k)
             self.wifs.append(wif(pk_bytes))
 
diff --git a/test/functional/p2p_blocksonly.py b/test/functional/p2p_blocksonly.py
index 12cb06a407..ec35750dc8 100755
--- a/test/functional/p2p_blocksonly.py
+++ b/test/functional/p2p_blocksonly.py
@@ -28,7 +28,7 @@ class P2PBlocksOnly(BitcoinTestFramework):
             }],
             outputs=[{
                 self.nodes[0].get_deterministic_priv_key().address: 50 - 0.00125
-            }],
+            }, {"fee": 0.00125}],
         )
         sigtx = self.nodes[0].signrawtransactionwithkey(
             hexstring=rawtx,
diff --git a/test/functional/p2p_segwit.py b/test/functional/p2p_segwit.py
index deb2f04a68..edb1e9aeb6 100755
--- a/test/functional/p2p_segwit.py
+++ b/test/functional/p2p_segwit.py
@@ -10,7 +10,7 @@ import struct
 import time
 
 from test_framework.blocktools import create_block, create_coinbase, add_witness_commitment, WITNESS_COMMITMENT_HEADER
-from test_framework.key import ECKey, CPubKey
+from test_framework.key import ECKey, ECPubKey
 from test_framework.messages import (
     COIN,
     BIP125_SEQUENCE_NUMBER,