diff --git a/hive-c0re/src/agent_ports.rs b/hive-c0re/src/agent_ports.rs
index ae9880f8..6b38049a 100644
--- a/hive-c0re/src/agent_ports.rs
+++ b/hive-c0re/src/agent_ports.rs
@@ -110,7 +110,11 @@ mod tests {
 
     #[test]
     fn build_map_filters_manager() {
-        let names: Vec<String> = ["iris", "hm1nd", "argus"]
+        // Use MANAGER_NAME in the input so the assert below actually
+        // exercises the filter path — a literal `"hm1nd"` would pass
+        // trivially if the constant ever changed and the filter
+        // silently became a no-op (argus on PR #748).
+        let names: Vec<String> = ["iris", MANAGER_NAME, "argus"]
             .iter()
             .map(|s| (*s).to_owned())
             .collect();