diff --git a/fastn-core/src/catch_panic.rs b/fastn-core/src/catch_panic.rs
index 21985d23f6..e5fd83e6c3 100644
--- a/fastn-core/src/catch_panic.rs
+++ b/fastn-core/src/catch_panic.rs
@@ -84,12 +84,16 @@ where
             .map(move |res| match res {
                 Ok(Ok(res)) => Ok(res),
                 Ok(Err(svc_err)) => Err(svc_err),
-                Err(_panic_err) => Err(error::ErrorInternalServerError("500 Server Error")),
+                Err(_panic_err) => Err(error::ErrorInternalServerError(
+                    INTERNAL_SERVER_ERROR_MESSAGE,
+                )),
             })
             .boxed_local()
     }
 }
 
+const INTERNAL_SERVER_ERROR_MESSAGE: &str = "500 Server Error";
+
 #[cfg(test)]
 mod tests {
     use actix_web::{
@@ -146,6 +150,6 @@ mod tests {
         let res = err.error_response();
         assert_eq!(res.status(), StatusCode::INTERNAL_SERVER_ERROR);
         let body = to_bytes(res.into_body()).await.unwrap();
-        assert!(body.is_empty());
+        assert_eq!(body, INTERNAL_SERVER_ERROR_MESSAGE)
     }
 }