diff --git a/test/functional/feature_dersig.py b/test/functional/feature_dersig.py
index 9628945a808ea..38cdf0501e222 100755
--- a/test/functional/feature_dersig.py
+++ b/test/functional/feature_dersig.py
@@ -36,7 +36,6 @@ def unDERify(tx):
     tx.vin[0].scriptSig = CScript(newscript)
 
 
-
 class BIP66Test(BitcoinTestFramework):
     def set_test_params(self):
         self.num_nodes = 1
@@ -45,7 +44,7 @@ def set_test_params(self):
             '-par=1',  # Use only one script thread to get the exact log msg for testing
         ]]
         self.setup_clean_chain = True
-        self.rpc_timeout = 120
+        self.rpc_timeout = 240
 
     def skip_test_if_missing_module(self):
         self.skip_if_no_wallet()
diff --git a/test/functional/mempool_reorg.py b/test/functional/mempool_reorg.py
index 3b148d5cf094c..d797dff13492d 100755
--- a/test/functional/mempool_reorg.py
+++ b/test/functional/mempool_reorg.py
@@ -76,7 +76,7 @@ def run_test(self):
         spend_101_id = self.nodes[0].sendrawtransaction(spend_101_raw)
         spend_102_1_id = self.nodes[0].sendrawtransaction(spend_102_1_raw)
 
-        self.sync_all(timeout=360)
+        self.sync_all(timeout=720)
 
         assert_equal(set(self.nodes[0].getrawmempool()), {spend_101_id, spend_102_1_id, timelock_tx_id})
 
@@ -91,10 +91,11 @@ def run_test(self):
         for node in self.nodes:
             node.invalidateblock(new_blocks[0])
 
-        self.sync_all(timeout=360)
+        self.sync_all(timeout=720)
 
         # mempool should be empty.
         assert_equal(set(self.nodes[0].getrawmempool()), set())
 
+
 if __name__ == '__main__':
     MempoolCoinbaseTest().main()
diff --git a/test/functional/wallet_groups.py b/test/functional/wallet_groups.py
index f2fa1d3e40098..261a43472bb6e 100755
--- a/test/functional/wallet_groups.py
+++ b/test/functional/wallet_groups.py
@@ -11,12 +11,13 @@
     assert_equal,
 )
 
+
 class WalletGroupTest(BitcoinTestFramework):
     def set_test_params(self):
         self.setup_clean_chain = True
         self.num_nodes = 3
         self.extra_args = [[], [], ['-avoidpartialspends']]
-        self.rpc_timeout = 240
+        self.rpc_timeout = 480
 
     def skip_test_if_missing_module(self):
         self.skip_if_no_wallet()
@@ -87,5 +88,6 @@ def run_test(self):
         # is way too big.
         assert self.nodes[2].sendtoaddress(address=addr2[0], amount=5)
 
+
 if __name__ == '__main__':
-    WalletGroupTest().main ()
+    WalletGroupTest().main()
diff --git a/test/functional/wallet_multiwallet.py b/test/functional/wallet_multiwallet.py
index f2fa41b647a05..78ead514a5e2d 100755
--- a/test/functional/wallet_multiwallet.py
+++ b/test/functional/wallet_multiwallet.py
@@ -24,6 +24,7 @@ class MultiWalletTest(BitcoinTestFramework):
     def set_test_params(self):
         self.setup_clean_chain = True
         self.num_nodes = 2
+        self.rpc_timeout = 120
 
     def skip_test_if_missing_module(self):
         self.skip_if_no_wallet()