diff --git a/src/main.rs b/src/main.rs
index cd9fe90..d6e9c03 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -66,7 +66,7 @@ fn hex_float(h: f64) -> String {
 
 #[test]
 fn test_hex_float() {
-   assert_eq!["1.8", hex_float(f64::MAX)];
+   assert_eq!["1.8", hex_float(1.5)];
 }
 
 fn separate_units(n: usize, how_base: HowNumberBase) -> String {