Reifying higher-kinded type in a scala 2 macro

Question

I have the following trait / macro definition:

trait Test[A[_]] {
  def hello: String
}

object Test {
  def getTest[A[_]]: Test[A] = macro Impl.getTest[A]
}

class Impl(c: whitebox.Context) {
  import c.universe._

  def getTest[A[_]](implicit tt: WeakTypeTag[A[_]]): c.Expr[Test[A]] = {
    reify {
      new Test[A] {
        override def hello: String = "test"
      }
    }
  }
}

Which i try to use like so

      val test = Test.getTest[List]
      println(test.hello)

However, when I try to build, i get the error "Macro expansion contains free type variable A defined by getTest in Test.scala.... Have you forgotten to use c.WeakTypeTag annotation for this type parameter? ". What is the correct way for me to provide a typetag for a higher-kinded type?