diff --git a/src/libstd/num/mod.rs b/src/libstd/num/mod.rs
index 9458ed1d3535e..35d973d2d4e6d 100644
--- a/src/libstd/num/mod.rs
+++ b/src/libstd/num/mod.rs
@@ -1633,7 +1633,7 @@ mod tests {
                 assert_eq!((3 as $T).is_power_of_two(), false);
                 assert_eq!((4 as $T).is_power_of_two(), true);
                 assert_eq!((5 as $T).is_power_of_two(), false);
-                assert!(($T::MAX / 2 + 1).is_power_of_two(), true);
+                assert_eq!(($T::MAX / 2 + 1).is_power_of_two(), true);
             }
         )
     }