diff --git a/tests/optional_scalars/ScalarStuff.py b/tests/optional_scalars/ScalarStuff.py
index 4dea123..ca7c253 100644
--- a/tests/optional_scalars/ScalarStuff.py
+++ b/tests/optional_scalars/ScalarStuff.py
@@ -443,6 +443,11 @@
         return cls.InitFromObj(scalarStuff)
 
     @classmethod
+    def InitFromPackedBuf(cls, buf, pos=0):
+        n = flatbuffers.encode.Get(flatbuffers.packer.uoffset, buf, pos)
+        return cls.InitFromBuf(buf, pos+n)
+
+    @classmethod
     def InitFromObj(cls, scalarStuff):
         x = ScalarStuffT()
         x._UnPack(scalarStuff)