diff --git a/test/common/listener.h b/test/common/listener.h
new file mode 100644
index 000000000..0da38e23a
--- /dev/null
+++ b/test/common/listener.h
@@ -0,0 +1,17 @@
+#ifndef ENTT_COMMON_LISTENER_H
+#define ENTT_COMMON_LISTENER_H
+
+namespace test {
+
+template<typename Type>
+struct listener {
+    void on(Type elem) {
+        value = elem;
+    }
+
+    int value{};
+};
+
+} // namespace test
+
+#endif