There is no risk increasing the timeout, but it avoids intermittent issues (when running in valgrind) of the form:
node1 2023-07-15T06:17:37.827609Z [http] [httpserver.cpp:255] [http_request_cb] [http] Received a POST request for / from 127.0.0.1:45950
node1 2023-07-15T06:17:37.833168Z [httpworker.3] [rpc/request.cpp:181] [parse] [rpc] ThreadRPCServer method=signrawtransactionwithwallet user=__cookie__
test 2023-07-15T06:17:38.037000Z TestFramework (ERROR): JSONRPC error
Traceback (most recent call last):
File "/root/b-c-ci/ci/scratch/build/bitcoin-x86_64-pc-linux-gnu/test/functional/test_framework/test_framework.py", line 131, in main
self.run_test()
File "/root/b-c-ci/ci/scratch/build/bitcoin-x86_64-pc-linux-gnu/test/functional/wallet_fundrawtransaction.py", line 137, in run_test
self.test_many_inputs_send()
File "/root/b-c-ci/ci/scratch/build/bitcoin-x86_64-pc-linux-gnu/test/functional/wallet_fundrawtransaction.py", line 687, in test_many_inputs_send
fundedAndSignedTx = self.nodes[1].signrawtransactionwithwallet(fundedTx['hex'])
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/root/b-c-ci/ci/scratch/build/bitcoin-x86_64-pc-linux-gnu/test/functional/test_framework/coverage.py", line 50, in __call__
return_val = self.auth_service_proxy_instance.__call__(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/root/b-c-ci/ci/scratch/build/bitcoin-x86_64-pc-linux-gnu/test/functional/test_framework/authproxy.py", line 129, in __call__
raise JSONRPCException(response['error'], status)
test_framework.authproxy.JSONRPCException: Error: Please enter the wallet passphrase with walletpassphrase first. (-13)