diff --git a/backend/src/procedure/mod.rs b/backend/src/procedure/mod.rs
index 02449a076..7c02a03d5 100644
--- a/backend/src/procedure/mod.rs
+++ b/backend/src/procedure/mod.rs
@@ -179,5 +179,7 @@ impl<'de> Deserialize<'de> for NoOutput {
 #[test]
 fn test_deser_no_output() {
     serde_json::from_str::<NoOutput>("").unwrap();
-    serde_json::from_str::<Result<NoOutput, NoOutput>>("{\"Ok\": null}").unwrap();
+    serde_json::from_str::<Result<NoOutput, NoOutput>>("{\"Ok\": null}")
+        .unwrap()
+        .unwrap();
 }