diff --git a/src/main.rs b/src/main.rs
index 81f8722..4bc01e1 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -329,10 +329,6 @@ fn colour_from_string(colour: String) -> Colour {
     Colour { red, green, blue }
 }
 
-fn colour_to_string(colour: Colour) -> String {
-    format!("{},{},{}", colour.red, colour.green, colour.blue)
-}
-
 #[test]
 fn test_colour_from_string() {
     assert_eq!(
@@ -341,6 +337,10 @@ fn test_colour_from_string() {
     );
 }
 
+fn colour_to_string(colour: Colour) -> String {
+    format!("{},{},{}", colour.red, colour.green, colour.blue)
+}
+
 #[test]
 fn test_colour_to_string() {
     assert_eq!(