[Flaky test] test_restored_on_existing_restored_account_fails fails when run as part of a suite

[jrainville]

When run as a suite:

FAILED tests/test_backup_mnemonic_and_restore.py::TestBackupMnemonicAndRestore::test_restored_on_existing_restored_account_fails - AssertionError: assert '[validation] keypair already added -  keyuid: 0x3231d92c94548d14f097173765a50bebe28fbad8f2267c9e08cc4433a6f219a4' in '[validation] keypair already...
== 1 failed, 13 passed, 315 deselected in 34.56s ==

When run alone:

==== 1 passed, 328 deselected in 3.14s =======

[jrainville]

cc @fbarbu15 @saledjenic as you're the ones that created or updated this test

[fbarbu15]

@jrainville Thanks for flagging this, I could reproduce it locally and fixed it here