)
    assertInvalid(
      "text/plain; a=\"@",
      "Parameter is not formatted correctly: \"a=\"@\" for: \"text/plain; a=\"@\"",
    )
    assertInvalid(
      "text/plain; a=1; b",
      "Parameter is not formatted correctly: \"b\" for: \"text/plain; a=1; b\"",
    )
    assertInvalid(
      "text/plain; a=1; b=",