void (@NotNull final PyUnitTestProcessRunner runner, @NotNull final String stdout, @NotNull final String stderr, @NotNull final String all, int exitCode) { var printer = MockPrinter.fillPrinter(runner.findTestByName("[test]")); assertThat(printer.getStdErr()) .describedAs("Subtest assertEquals broken") .contains("AssertionError: 'D' != 'a'"); }