 	:appsignal, :config,
 	running_in_container: false
       )
-      assert valid_heroku_configuration |> Map.put(:running_in_container, false) == init_config
+      assert valid_heroku_configuration() |> Map.put(:running_in_container, false) == init_config()
       assert "false" == System.get_env("APPSIGNAL_RUNNING_IN_CONTAINER")
     end
 

    end

    test ":running_in_container and :log" do
      assert valid_heroku_configuration == init_config
      assert "true" == System.get_env("APPSIGNAL_RUNNING_IN_CONTAINER")
      assert "stdout" == System.get_env("APPSIGNAL_LOG")
    end

    )
  end

  defp init_config() do
    Config.initialize()
    Application.get_all_env(:appsignal)[:config]
  end
