The test log contains detailed information on every assertion in every test case. The log can be formatted as plain human readable text or as XML and can be sent to the standard output stream, the standard error stream or a file.

The amount of detail in the log is set with the --log_level option. The format of the log is set with the --log_format option. The destination of the log is set with the --log_sink option. The --output_format option sets both the log format and the report format.

The XML format for the test log conforms to the schema UTF.log.xsd.