Compressed SSZ files used in unit test need to be related

We have 2 ssz files as fixtures, one for the beacon state and another one for an empty block, the two appear to be related and picking any two of those fail a specific test:

  1) test construct block (Unit.Validator.BlockBuilderTest)
     test/unit/validator/block_builder_test.exs:21
     Assertion with == failed
     code:  assert block.body.randao_reveal == spec_block.message.body.randao_reveal
     left:  "\x97M_\x1D\xBB\xC5\xF5\xE5QW]^\xEFԼxl\x13Y\xB80\xA8x\xC8\xDDK\xAEP9\x91\xF8\x92\x10\xB6\xF1\xF8\x8Cpdw\xD7A\x8A\x86\x05$\xC0\xFF\x14\x1C\xE1\xF4`\xB6\x96BU\xCB\x18\xD0\xF4\xBE\xD0F\x92\xE3ka\xE7)U\e\x9A\x8F-.o\xC1\xA4$\xC3\xD4-\xBD`\x89l\xB6\xED\xFD\xD8\tG\x9C\xFB\xC5"
     right: "?\xAD\xB5\xBE\xE4\xD4_\xF7\x01eE\x15W\x9F\x13\xE4$\xA8\x82\x89r\x97\xBF\vb\xFB}(\xDE(\xAC\xBCHy\xD2wZ\x0E\x0Ew)=*\xD3\"\xED\xC5S\xA4\x04\xEDʪ\xF7ɯ\xFB\tg\e\xD4޺[`D\x82>VE\x8D\x8F\xB4C\xBE/\xED\xCD\r\x9C\d}5\xB4\xD4\x13l9\xFFӻ*i\xD7\xF0\xD8"
     stacktrace:
       test/unit/validator/block_builder_test.exs:59: (test)

Start with test/unit/validator/block_builder_test.exs, especially the failing test at lines 21 and 59, and inspect the two SSZ fixtures used for the beacon state and empty block. Verify how the fixtures are loaded and make them represent related data so the block body's randao_reveal matches the expected specification block; rerun the block builder test to confirm it passes.