weird clojure.test behavior

gistfile1.clj

;; With this code
(is (every? #{1} (apply-redis-instructions! instrs)))
(is (every? #{1} '(1 1 1)))

;; I get this single failure:
expected: (every? #{1} (apply-redis-instructions! instrs))
  actual: (not (every? #{1} (1 1)))

;; With this code, I get no failures
(is (every? #(= % 1) (apply-redis-instructions! instrs)))
(is (every? #(= % 1) '(1 1 1)))

;; Shouldn't #(= % 1) and #{1} be equivalent as predicates for every?
;; and '(1 1 1) should be equivalent to the lazy seq returned by my
;; redis function anyway, no?