Hi Tim, > However, when I run the tests there appears to be failures. > > Extract of the make test output below: > > > ../test/recipes/20-test_enc.t ...................... > Dubious, test returned 1 (wstat 256, 0x100) > Failed 1/172 subtests Your test failure looks like issue https://github.com/openssl/openssl/issues/9866 which was fixed by Tomas in commit https://github.com/openssl/openssl/commit/86ed78676c660b553696cc10c682962522dfeb6c The easiest way to obtain the fix is to update to the current head of the 1.1.1. stable branch. https://github.com/openssl/openssl/commits/OpenSSL_1_0_1-stable Regards, Matthias