diff --git a/src/dev/check.rs b/src/dev/check.rs
index 0b243b2f..c89eb35d 100644
--- a/src/dev/check.rs
+++ b/src/dev/check.rs
@@ -260,7 +260,7 @@ fn check_solutions(
             .arg("--edition")
             .arg("2021")
             .arg("--color")
-            .arg("--always")
+            .arg("always")
             .stdin(Stdio::null());
 
         for (exercise_name, handle) in info_file