diff --git a/test/blob_test.capnp b/test/blob_test.capnp
new file mode 100644
index 0000000..cd89023
--- /dev/null
+++ b/test/blob_test.capnp
@@ -0,0 +1,5 @@
+@0xacfbfd0b7bde9594;
+
+struct BlobTest {
+    blob @0 :Data;
+}
\ No newline at end of file