diff --git a/lib/wasi/tests/wasitests/_common.rs b/lib/wasi/tests/wasitests/_common.rs
index 687324e13..1fbd783f4 100644
--- a/lib/wasi/tests/wasitests/_common.rs
+++ b/lib/wasi/tests/wasitests/_common.rs
@@ -46,7 +46,7 @@ macro_rules! assert_wasi_output {
             .map_err(|e| format!("{:?}", e))
             .expect("start function in wasi module");
 
-        let _result = start.call();
+        start.call().expect("execute the wasm");
 
         let output = capturer.end().unwrap().0;
         let expected_output = include_str!($expected);