The `includeSystemErrLog` option allows configuring whether or not test error output written to standard error is exported to the XML report file.

These options affect both test-suite level output (such as `@BeforeClass`/`@BeforeAll` output) and test class and method-specific output (`@Before`/`@BeforeEach` and `@Test`).
If either option is disabled, the element that normally contains that content will be excluded from the XML report file.