diff --git a/crates/snapbox/src/cmd.rs b/crates/snapbox/src/cmd.rs
index ad2af70..208c0aa 100644
--- a/crates/snapbox/src/cmd.rs
+++ b/crates/snapbox/src/cmd.rs
@@ -290,6 +290,7 @@ impl Command {
     ///     .stdout_eq("42");
     /// ```
     #[track_caller]
+    #[must_use]
     pub fn assert(self) -> OutputAssert {
         let config = self.config.clone();
         match self.output() {