If you supply --with-builtin=snappy,zlib,zstd,etc to the configure script, our Python tests will not pick up the compressors and any test scenarios that use them will be skipped.

The only way to get tests to use extensions is to supply --enable-snappy and other similar flags to build each of them as shared libraries.

Having compressors statically linked as a builtin should not prevent them from being used in Python tests.