diff --git a/installer/templates/phx_ecto/data_case.ex b/installer/templates/phx_ecto/data_case.ex
index 3ec498c660..80bfc874f0 100644
--- a/installer/templates/phx_ecto/data_case.ex
+++ b/installer/templates/phx_ecto/data_case.ex
@@ -50,7 +50,9 @@ defmodule <%= @app_module %>.DataCase do
   def errors_on(changeset) do
     Ecto.Changeset.traverse_errors(changeset, fn {message, opts} ->
       Regex.replace(~r"%{(\w+)}", message, fn _, key ->
-        opts |> Keyword.get(String.to_existing_atom(key), key) |> to_string()
+        opts
+        |> Keyword.get(String.to_existing_atom(key), key)
+        |> inspect()
       end)
     end)
   end