         changeset = Performance.changeset(%Performance{}, params, round)
         refute changeset.valid?
 
-        assert changeset.errors[:base] ==
+        assert changeset.errors[:appearances] ==
                  {"The performance can't have more than one soloist.", []}
       end
 

        changeset = Performance.changeset(%Performance{}, params, round)
        refute changeset.valid?

        assert changeset.errors[:base] ==
                 {"The performance can't have both soloists and ensemblists.", []}
      end


        changeset = Performance.changeset(%Performance{}, params, round)
        refute changeset.valid?

        assert changeset.errors[:appearances] ==
                 {"The performance must have at least one participant.", []}
      end

