diff --git a/metropolis/test/nanoswitch/nanoswitch.go b/metropolis/test/nanoswitch/nanoswitch.go
index bfd3323..b491c7b 100644
--- a/metropolis/test/nanoswitch/nanoswitch.go
+++ b/metropolis/test/nanoswitch/nanoswitch.go
@@ -208,7 +208,7 @@
 	}
 	go func() {
 		for p := range reader.Stream {
-			fmt.Fprintf(os.Stderr, "%s\n", p.String())
+			fmt.Fprintf(os.Stderr, "%s\n", p.ConciseString(nil, 120))
 		}
 	}()
 	supervisor.New(context.Background(), func(ctx context.Context) error {