diff --git a/test/functional/test_framework/test_framework.py b/test/functional/test_framework/test_framework.py
index d8ae20981da..475a05eb156 100755
--- a/test/functional/test_framework/test_framework.py
+++ b/test/functional/test_framework/test_framework.py
@@ -191,6 +191,8 @@ class BitcoinTestFramework(metaclass=BitcoinTestMetaClass):
         parser.add_argument("--timeout-factor", dest="timeout_factor", type=float, help="adjust test timeouts by a factor. Setting it to 0 disables all timeouts")
         parser.add_argument("--v2transport", dest="v2transport", default=False, action="store_true",
                             help="use BIP324 v2 connections between all nodes by default")
+        parser.add_argument("--v1transport", dest="v1transport", default=False, action="store_true",
+                            help="Explicitly use v1 transport (can be used to overwrite global --v2transport option)")
 
         self.add_options(parser)
         # Running TestShell in a Jupyter notebook causes an additional -f argument
@@ -206,6 +208,8 @@ class BitcoinTestFramework(metaclass=BitcoinTestMetaClass):
         config = configparser.ConfigParser()
         config.read_file(open(self.options.configfile))
         self.config = config
+        if self.options.v1transport:
+            self.options.v2transport=False
 
         if "descriptors" not in self.options:
             # Wallet is not required by the test at all and the value of self.options.descriptors won't matter.
diff --git a/test/functional/test_runner.py b/test/functional/test_runner.py
index 9f69fd898dc..465b4fb0d86 100755
--- a/test/functional/test_runner.py
+++ b/test/functional/test_runner.py
@@ -120,7 +120,7 @@ BASE_SCRIPTS = [
     'wallet_backup.py --legacy-wallet',
     'wallet_backup.py --descriptors',
     'feature_segwit.py --legacy-wallet',
-    'feature_segwit.py --descriptors',
+    'feature_segwit.py --descriptors --v1transport',
     'feature_segwit.py --descriptors --v2transport',
     'p2p_tx_download.py',
     'wallet_avoidreuse.py --legacy-wallet',
@@ -156,7 +156,7 @@ BASE_SCRIPTS = [
     # vv Tests less than 30s vv
     'p2p_invalid_messages.py',
     'rpc_createmultisig.py',
-    'p2p_timeouts.py',
+    'p2p_timeouts.py --v1transport',
     'p2p_timeouts.py --v2transport',
     'wallet_dump.py --legacy-wallet',
     'rpc_signer.py',
@@ -201,7 +201,7 @@ BASE_SCRIPTS = [
     'mempool_spend_coinbase.py',
     'wallet_avoid_mixing_output_types.py --descriptors',
     'mempool_reorg.py',
-    'p2p_block_sync.py',
+    'p2p_block_sync.py --v1transport',
     'p2p_block_sync.py --v2transport',
     'wallet_createwallet.py --legacy-wallet',
     'wallet_createwallet.py --usecli',
@@ -230,13 +230,13 @@ BASE_SCRIPTS = [
     'wallet_transactiontime_rescan.py --descriptors',
     'wallet_transactiontime_rescan.py --legacy-wallet',
     'p2p_addrv2_relay.py',
-    'p2p_compactblocks_hb.py',
+    'p2p_compactblocks_hb.py --v1transport',
     'p2p_compactblocks_hb.py --v2transport',
-    'p2p_disconnect_ban.py',
+    'p2p_disconnect_ban.py --v1transport',
     'p2p_disconnect_ban.py --v2transport',
     'feature_posix_fs_permissions.py',
     'rpc_decodescript.py',
-    'rpc_blockchain.py',
+    'rpc_blockchain.py --v1transport',
     'rpc_blockchain.py --v2transport',
     'rpc_deprecated.py',
     'wallet_disable.py',
@@ -246,21 +246,21 @@ BASE_SCRIPTS = [
     'p2p_getaddr_caching.py',
     'p2p_getdata.py',
     'p2p_addrfetch.py',
-    'rpc_net.py',
+    'rpc_net.py --v1transport',
     'rpc_net.py --v2transport',
     'wallet_keypool.py --legacy-wallet',
     'wallet_keypool.py --descriptors',
     'wallet_descriptor.py --descriptors',
     'p2p_nobloomfilter_messages.py',
     'p2p_filter.py',
-    'rpc_setban.py',
+    'rpc_setban.py --v1transport',
     'rpc_setban.py --v2transport',
     'p2p_blocksonly.py',
     'mining_prioritisetransaction.py',
     'p2p_invalid_locator.py',
-    'p2p_invalid_block.py',
+    'p2p_invalid_block.py --v1transport',
     'p2p_invalid_block.py --v2transport',
-    'p2p_invalid_tx.py',
+    'p2p_invalid_tx.py --v1transport',
     'p2p_invalid_tx.py --v2transport',
     'p2p_v2_transport.py',
     'p2p_v2_encrypted.py',
@@ -286,12 +286,12 @@ BASE_SCRIPTS = [
     'rpc_preciousblock.py',
     'wallet_importprunedfunds.py --legacy-wallet',
     'wallet_importprunedfunds.py --descriptors',
-    'p2p_leak_tx.py',
+    'p2p_leak_tx.py --v1transport',
     'p2p_leak_tx.py --v2transport',
     'p2p_eviction.py',
-    'p2p_ibd_stalling.py',
+    'p2p_ibd_stalling.py --v1transport',
     'p2p_ibd_stalling.py --v2transport',
-    'p2p_net_deadlock.py',
+    'p2p_net_deadlock.py --v1transport',
     'p2p_net_deadlock.py --v2transport',
     'wallet_signmessagewithaddress.py',
     'rpc_signmessagewithprivkey.py',
@@ -380,7 +380,7 @@ BASE_SCRIPTS = [
     'feature_coinstatsindex.py',
     'wallet_orphanedreward.py',
     'wallet_timelock.py',
-    'p2p_node_network_limited.py',
+    'p2p_node_network_limited.py --v1transport',
     'p2p_node_network_limited.py --v2transport',
     'p2p_permissions.py',
     'feature_blocksdir.py',