diff --git a/tests/trig.lisp b/tests/trig.lisp
index a979ca8139ea99a3d43f1498725492c14df5b337..84fc74c1a3743d13052bf509d16757def7a6c2f1 100644
--- a/tests/trig.lisp
+++ b/tests/trig.lisp
@@ -16,7 +16,7 @@
 (define-test sin.very-small
   "Tests sin for the case of |x| < 2^-27, but not 0."
   (:tag :sin)
-  (assert-eql (scale-float 1d0 -27)
+  (assert-eql (scale-float 1d0 -28)
 	      (sin (scale-float 1d0 -28))))
 
 (define-test sin.no-reduction