Stop long text notification sound

[tkr]

I have iphone 5s. I have assigned a loud long text notification sound, it needs to wake me up at night. I expected the sound would stop when i open the text and read it. But it seems to just keep playing until the end of the 'song'. Is there a way for the sound to stop once I open and read the text?

 

[Chopperbill]

Pick a different text tone?