Elasticsearch fuzzy search scores the same for exact match and non-exact match

I index two documents, one with text "testphone5" and one with text
"testphone 4s". I then perform a fuzzy query on the text field,
specifying "testphone5" as the value. Both documents get returned with the
exact same score. Why is this? Shouldn't the exact match have a higher
score than the non-exact match?

Gist to recreate the issue is below (it's really simple):

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