Developed robust regression tests for the openssl/openssl repository, focusing on the EVP multi-step initialization path to enhance cryptographic provider resilience. Leveraging C programming and software testing expertise, implemented dynamic discovery of all IV-taking ciphers using EVP_CIPHER_do_all_provided(), ensuring that new ciphers are automatically covered without additional maintenance. The tests validated that initializing ciphers with key and IV in any order yields identical results to single-call initialization, including correct authentication tag handling for AEAD modes. This work addressed risks of silent key reuse highlighted in prior issues, reduced the potential for future regressions, and laid groundwork for further improvements in cryptographic robustness.