diff --git a/exercises/traits/traits1.rs b/exercises/traits/traits1.rs
index 2ef9e11b..15e08f24 100644
--- a/exercises/traits/traits1.rs
+++ b/exercises/traits/traits1.rs
@@ -29,12 +29,12 @@ mod tests {
     use super::*;
 
     #[test]
-    fn is_FooBar() {
+    fn is_foo_bar() {
         assert_eq!(String::from("Foo").append_bar(), String::from("FooBar"));
     }
 
     #[test]
-    fn is_BarBar() {
+    fn is_bar_bar() {
         assert_eq!(
             String::from("").append_bar().append_bar(),
             String::from("BarBar")