diff --git a/python_modules/dagster-test/dagster_test/toys/extenral_assets.py b/python_modules/dagster-test/dagster_test/toys/extenral_assets.py
new file mode 100644
index 0000000000000..715f34848fea5
--- /dev/null
+++ b/python_modules/dagster-test/dagster_test/toys/extenral_assets.py
@@ -0,0 +1,26 @@
+from dagster import AssetMaterialization, AssetSpec, Definitions, OpExecutionContext, job, op
+from dagster._core.definitions.external_asset import external_assets_from_specs
+
+asset_one = AssetSpec("asset_one")
+
+asset_two = AssetSpec("asset_two", deps=[asset_one])
+
+
+@op
+def insert_materializations(context: OpExecutionContext) -> None:
+    context.log_event(
+        AssetMaterialization(asset_one.key, metadata={"nrows": 10, "source": "From this script."})
+    )
+    context.log_event(
+        AssetMaterialization(asset_two.key, metadata={"nrows": 12, "source": "From this script."})
+    )
+
+
+@job
+def insert_materializations_job() -> None:
+    insert_materializations()
+
+
+defs = Definitions(
+    assets=external_assets_from_specs([asset_one, asset_two]), jobs=[insert_materializations_job]
+)