Fix Stash testnet test
Fix Stash testnet test

See https://github.com/iancoleman/bip39/pull/238#issuecomment-429679117

iancoleman/bip39,Coinomi/bip39,iancoleman/bip39,Coinomi/bip39,iancoleman/bip39,iancoleman/bip39,Coinomi/bip39,iancoleman/bip39