diff --git a/test/functional/rpc_getblockfilter.py b/test/functional/rpc_getblockfilter.py
--- a/test/functional/rpc_getblockfilter.py
+++ b/test/functional/rpc_getblockfilter.py
@@ -7,7 +7,7 @@
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import (
     assert_equal, assert_is_hex_string, assert_raises_rpc_error,
-    connect_nodes, disconnect_nodes, sync_blocks
+    connect_nodes, disconnect_nodes
 )
 
 FILTER_TYPES = ["basic"]
@@ -34,7 +34,7 @@
 
         # Reorg node 0 to a new chain
         connect_nodes(self.nodes[0], self.nodes[1])
-        sync_blocks(self.nodes)
+        self.sync_blocks()
 
         assert_equal(self.nodes[0].getblockcount(), 4)
         chain1_hashes = [self.nodes[0].getblockhash(
diff --git a/test/functional/test_framework/test_framework.py b/test/functional/test_framework/test_framework.py
--- a/test/functional/test_framework/test_framework.py
+++ b/test/functional/test_framework/test_framework.py
@@ -32,8 +32,6 @@
     p2p_port,
     PortSeed,
     rpc_port,
-    sync_blocks,
-    sync_mempools,
 )
 
 
@@ -529,15 +527,55 @@
         connect_nodes(self.nodes[1], self.nodes[2])
         self.sync_all()
 
-    def sync_blocks(self, nodes=None, **kwargs):
-        sync_blocks(nodes or self.nodes, **kwargs)
-
-    def sync_mempools(self, nodes=None, **kwargs):
-        sync_mempools(nodes or self.nodes, **kwargs)
-
-    def sync_all(self, nodes=None, **kwargs):
-        self.sync_blocks(nodes, **kwargs)
-        self.sync_mempools(nodes, **kwargs)
+    def sync_blocks(self, nodes=None, wait=1, timeout=60):
+        """
+        Wait until everybody has the same tip.
+        sync_blocks needs to be called with an rpc_connections set that has least
+        one node already synced to the latest, stable tip, otherwise there's a
+        chance it might return before all nodes are stably synced.
+        """
+        rpc_connections = nodes or self.nodes
+        timeout = int(timeout * self.options.timeout_factor)
+        stop_time = time.time() + timeout
+        while time.time() <= stop_time:
+            best_hash = [x.getbestblockhash() for x in rpc_connections]
+            if best_hash.count(best_hash[0]) == len(rpc_connections):
+                return
+            # Check that each peer has at least one connection
+            assert (all([len(x.getpeerinfo()) for x in rpc_connections]))
+            time.sleep(wait)
+        raise AssertionError("Block sync timed out after {}s:{}".format(
+            timeout,
+            "".join("\n  {!r}".format(b) for b in best_hash),
+        ))
+
+    def sync_mempools(self, nodes=None, wait=1, timeout=60,
+                      flush_scheduler=True):
+        """
+        Wait until everybody has the same transactions in their memory
+        pools
+        """
+        rpc_connections = nodes or self.nodes
+        timeout = int(timeout * self.options.timeout_factor)
+        stop_time = time.time() + timeout
+        while time.time() <= stop_time:
+            pool = [set(r.getrawmempool()) for r in rpc_connections]
+            if pool.count(pool[0]) == len(rpc_connections):
+                if flush_scheduler:
+                    for r in rpc_connections:
+                        r.syncwithvalidationinterfacequeue()
+                return
+            # Check that each peer has at least one connection
+            assert (all([len(x.getpeerinfo()) for x in rpc_connections]))
+            time.sleep(wait)
+        raise AssertionError("Mempool sync timed out after {}s:{}".format(
+            timeout,
+            "".join("\n  {!r}".format(m) for m in pool),
+        ))
+
+    def sync_all(self, nodes=None):
+        self.sync_blocks(nodes)
+        self.sync_mempools(nodes)
 
     # Private helper methods. These should not be accessed by the subclass
     # test scripts.
diff --git a/test/functional/test_framework/util.py b/test/functional/test_framework/util.py
--- a/test/functional/test_framework/util.py
+++ b/test/functional/test_framework/util.py
@@ -457,46 +457,6 @@
                 0) == 24 for peer in from_node.getpeerinfo()))
 
 
-def sync_blocks(rpc_connections, *, wait=1, timeout=60):
-    """
-    Wait until everybody has the same tip.
-
-    sync_blocks needs to be called with an rpc_connections set that has least
-    one node already synced to the latest, stable tip, otherwise there's a
-    chance it might return before all nodes are stably synced.
-    """
-    stop_time = time.time() + timeout
-    while time.time() <= stop_time:
-        best_hash = [x.getbestblockhash() for x in rpc_connections]
-        if best_hash.count(best_hash[0]) == len(rpc_connections):
-            return
-        # Check that each peer has at least one connection
-        assert (all([len(x.getpeerinfo()) for x in rpc_connections]))
-        time.sleep(wait)
-    raise AssertionError("Block sync timed out:{}".format(
-        "".join("\n  {!r}".format(b) for b in best_hash)))
-
-
-def sync_mempools(rpc_connections, *, wait=1,
-                  timeout=60, flush_scheduler=True):
-    """
-    Wait until everybody has the same transactions in their memory
-    pools
-    """
-    stop_time = time.time() + timeout
-    while time.time() <= stop_time:
-        pool = [set(r.getrawmempool()) for r in rpc_connections]
-        if pool.count(pool[0]) == len(rpc_connections):
-            if flush_scheduler:
-                for r in rpc_connections:
-                    r.syncwithvalidationinterfacequeue()
-            return
-        # Check that each peer has at least one connection
-        assert (all([len(x.getpeerinfo()) for x in rpc_connections]))
-        time.sleep(wait)
-    raise AssertionError("Mempool sync timed out:{}".format(
-        "".join("\n  {!r}".format(m) for m in pool)))
-
 # Transaction/Block functions
 #############################
 
diff --git a/test/functional/wallet_balance.py b/test/functional/wallet_balance.py
--- a/test/functional/wallet_balance.py
+++ b/test/functional/wallet_balance.py
@@ -12,7 +12,6 @@
     assert_equal,
     assert_raises_rpc_error,
     connect_nodes,
-    sync_blocks,
 )
 
 
@@ -305,7 +304,7 @@
         # Now confirm tx_orig
         self.restart_node(1, ['-persistmempool=0'])
         connect_nodes(self.nodes[0], self.nodes[1])
-        sync_blocks(self.nodes)
+        self.sync_blocks()
         self.nodes[1].sendrawtransaction(tx_orig)
         self.nodes[1].generatetoaddress(1, ADDRESS_WATCHONLY)
         self.sync_all()