devdocs/assets/stylesheets/pages/_codeception.scss

._codeception {
  @extend %simple;

  .warning, .alert {
    @extend %note;
  }

  h4 {
      @extend %block-label;
  }

  .alert-danger { @extend %note-red; }

  .language-yaml {
      @extend .token;

      .c1 {
          @extend .token.comment;
      }

      .pi {
          @extend .token.operator;
      }

      .s {
          @extend .token.string;
      }
  }
}