diff --git a/extension/pybindings/pybindings.cpp b/extension/pybindings/pybindings.cpp
index 19d4d095963..de9119c1056 100644
--- a/extension/pybindings/pybindings.cpp
+++ b/extension/pybindings/pybindings.cpp
@@ -140,7 +140,7 @@ void setup_output_storage(
     const std::vector<Span<uint8_t>>& output_storages) {
   if (output_storages.size() != method.outputs_size()) {
     THROW_IF_ERROR(
-        Error(),
+        Error::InvalidArgument,
         "number of output storages %zu does not match number of outputs %zu",
         output_storages.size(),
         method.outputs_size());
diff --git a/extension/pybindings/test/make_test.py b/extension/pybindings/test/make_test.py
index e8d23fd44e6..5335df1a0b1 100644
--- a/extension/pybindings/test/make_test.py
+++ b/extension/pybindings/test/make_test.py
@@ -305,6 +305,7 @@ def test_constant_output_not_memory_planned(tester):
         ######### RUN TEST CASES #########
 
         def test_method_meta(tester) -> None:
+            # pyre-fixme[16]: Callable `make_test` has no attribute `wrapper`.
             exported_program, inputs = create_program(ModuleAdd())
 
             # Use pybindings to load the program and query its metadata.
@@ -351,6 +352,7 @@ def test_method_meta(tester) -> None:
 
         def test_bad_name(tester) -> None:
             # Create an ExecuTorch program from ModuleAdd.
+            # pyre-fixme[16]: Callable `make_test` has no attribute `wrapper`.
             exported_program, inputs = create_program(ModuleAdd())
 
             # Use pybindings to load and execute the program.