diff --git a/src/mana_plugin_cpp_test.cc b/src/mana_plugin_cpp_test.cc
index 95b2f29..2ca3cd0 100644
--- a/src/mana_plugin_cpp_test.cc
+++ b/src/mana_plugin_cpp_test.cc
@@ -7,6 +7,12 @@ using namespace mesytec::mnode::mana;
 class Sink: public IManaSink
 {
   public:
+    Sink()
+    {
+        log_set_level(LOG_INFO);
+        log_info("init: this=%p", this);
+    }
+
     void begin_run(const char *descriptor_json) override
     {
         (void)descriptor_json;