diff --git a/test/functional/wallet_import_rescan.py b/test/functional/wallet_import_rescan.py
--- a/test/functional/wallet_import_rescan.py
+++ b/test/functional/wallet_import_rescan.py
@@ -184,6 +184,8 @@
             variant.confirmation_height = self.nodes[0].getblockcount()
             variant.timestamp = self.nodes[0].getblockheader(
                 self.nodes[0].getbestblockhash())["time"]
+        # Conclude sync before calling setmocktime to avoid timeouts
+        self.sync_all()
 
         # Generate a block further in the future (past the rescan window).
         assert_equal(self.nodes[0].getrawmempool(), [])
diff --git a/test/functional/wallet_send.py b/test/functional/wallet_send.py
--- a/test/functional/wallet_send.py
+++ b/test/functional/wallet_send.py
@@ -388,6 +388,7 @@
         res = self.nodes[0].sendrawtransaction(hex)
         self.nodes[0].generate(1)
         assert_equal(self.nodes[0].gettransaction(txid)["confirmations"], 1)
+        self.sync_all()
 
         self.log.info("Lock unspents...")
         utxo1 = w0.listunspent()[0]