diff --git a/src/runtime2/mod.rs b/src/runtime2/mod.rs
index 51d48d1953e4f225196c577dc7637fa976451ed5..f3a8ea2dca933773b5eb236398e213a9ca468898 100644
--- a/src/runtime2/mod.rs
+++ b/src/runtime2/mod.rs
@@ -1,2 +1,4 @@
 mod runtime;
-mod messages;
\ No newline at end of file
+mod messages;
+
+#[cfg(test)] mod tests;
\ No newline at end of file