diff --git a/cmd/syncthing/main.go b/cmd/syncthing/main.go
index b1065113..83b49644 100644
--- a/cmd/syncthing/main.go
+++ b/cmd/syncthing/main.go
@@ -151,6 +151,7 @@ are mostly useful for developers. Use with care.
                  - "events"   (the events package)
                  - "files"    (the files package)
                  - "http"     (the main package; HTTP requests)
+                 - "locks"    (the sync package; trace long held locks)
                  - "net"      (the main package; connections & network messages)
                  - "model"    (the model package)
                  - "scanner"  (the scanner package)
diff --git a/internal/sync/sync_test.go b/internal/sync/sync_test.go
index 6729da03..70ed5ff2 100644
--- a/internal/sync/sync_test.go
+++ b/internal/sync/sync_test.go
@@ -16,6 +16,8 @@ import (
 )
 
 func TestTypes(t *testing.T) {
+	debug = false
+
 	if _, ok := NewMutex().(*sync.Mutex); !ok {
 		t.Error("Wrong type")
 	}