diff --git a/test/run-spec-test.py b/test/run-spec-test.py
index d7b3e8d..d30e1f9 100755
--- a/test/run-spec-test.py
+++ b/test/run-spec-test.py
@@ -288,6 +288,8 @@ class Wasm3():
         else:
             error = "Timeout"
 
+        print("Last output: " + buff)
+
         self.terminate()
         raise Exception(error)