an intermittent error on async false tests

[gabrielmancini]

i had this case:

test "saves new group", %{conn: conn} do
      project = insert(:project, [], prefix: conn.assigns.tenant)
      page = insert(:page, [project: project], prefix: conn.assigns.tenant)
      user = insert(:user, [], prefix: conn.assigns.tenant)

      {:ok, index_live, _html} = live(conn, ~p"/default/groups")

      assert index_live |> element("a", "New Group") |> render_click() =~
               "New Group"

      assert_patch(index_live, ~p"/default/groups/new")

      assert index_live
             |> form("#group-form", group: @invalid_attrs)
             |> render_change() =~ "can't be blank"

      param_group = params_for(:group, users: [user.id], pages: [page.id])

      {:ok, _, html} =
        index_live
        |> form("#group-form", group: param_group)
        |> render_submit()
        |> follow_redirect(conn, ~p"/default/groups")

      assert html =~ "Group created successfully"
      assert html =~ param_group.name
    end

sometimes works, but sometimes don't because my select box on the screen not found the previous inserted user or page .
what i am doing wrong here?

[btkostner]

This code example is pretty hard to debug alone. Are you able to post a link to your repo? Otherwise we will need to see your factories and live views you are trying to test.