Disclosed herein are methods, devices, and apparatuses, including computer programs stored on computer-readable media, for testing signature verification for a blockchain system. One of the methods includes: obtaining a testing configuration from a configuration file, wherein the testing configuration specifies a cryptography algorithm used in the blockchain system, a group of one or more private keys corresponding to the cryptography algorithm, and a predetermined execution result based on the cryptography algorithm and the group of one or more private keys; signing a transaction, by encrypting data representing the transaction based on the cryptography algorithm and the group of one or more private keys, to generate one or more signed transactions; sending the one or more signed transactions to the blockchain system and receiving an execution result from the blockchain system; and determining whether the predetermined execution result is satisfied based on the execution result.