void () { final CodeStyleSettings settings = CodeStyle.getSettings(getProject()); settings.getIndentOptions(JavaFileType.INSTANCE).USE_TAB_CHARACTER = false; myFixture.configureByText("x.css", """ /*noinspection ProblematicWhitespace*/ div { font-family: arial, helvetica; }"""); myFixture.testHighlighting(true, false, false); }