diff --git a/tests/sig-shadow.rules b/tests/sig-shadow.rules
new file mode 100644
index 0000000..06aaee2
--- /dev/null
+++ b/tests/sig-shadow.rules
@@ -0,0 +1,2 @@
+alert http any any -> any any (msg:"test"; http.host; content:"romeo"; sid:1; rev:1;)
+alert http any any -> any any (msg:"test"; http.host; content:"juliette"; sid:1; rev:2;)