diff --git a/sgl-router/tests/spec_test.rs b/sgl-router/tests/spec_test.rs
new file mode 100644
index 000000000..4d01893d8
--- /dev/null
+++ b/sgl-router/tests/spec_test.rs
@@ -0,0 +1,2 @@
+// Protocol specification tests
+mod spec;