diff --git a/tools/manifest/item.py b/tools/manifest/item.py
index e3fb72c502b5bbe..718df642f9c8835 100644
--- a/tools/manifest/item.py
+++ b/tools/manifest/item.py
@@ -128,6 +128,8 @@ def to_json(self):
             rv[-1]["testdriver"] = self.testdriver
         if self.jsshell:
             rv[-1]["jsshell"] = True
+        if self.script_metadata:
+            rv[-1]["script_metadata"] = self.script_metadata
         return rv