diff --git a/lib/core/locks.nim b/lib/core/locks.nim
index bddd6d8641bcb..da7cd5b6f3888 100644
--- a/lib/core/locks.nim
+++ b/lib/core/locks.nim
@@ -28,6 +28,10 @@ type
 
 {.push stackTrace: off.}
 
+
+proc `$`*(lock: Lock): string =
+  result = "()"
+
 proc initLock*(lock: var Lock) {.inline.} =
   ## Initializes the given lock.
   when not defined(js):
diff --git a/tests/stdlib/tlocks.nim b/tests/stdlib/tlocks.nim
index e567cfde8fdc2..0815c5d013a21 100644
--- a/tests/stdlib/tlocks.nim
+++ b/tests/stdlib/tlocks.nim
@@ -1,10 +1,10 @@
 discard """
-  output: '''3'''
-  cmd: "nim $target --threads:on $options $file"
+  targets: "c cpp js"
+  matrix: "--threads:on"
 """
 
 #bug #6049
 import uselocks
 
 var m = createMyType[int]()
-echo $m.use()
+doAssert m.use() == 3
diff --git a/tests/stdlib/uselocks.nim b/tests/stdlib/uselocks.nim
index cde9641b22c6c..e9d23f9d9ac27 100644
--- a/tests/stdlib/uselocks.nim
+++ b/tests/stdlib/uselocks.nim
@@ -9,3 +9,7 @@ proc createMyType*[T]: MyType[T] =
 proc use* (m: var MyType): int =
   withLock m.lock:
     result = 3
+
+block:
+  var l: Lock
+  doAssert $l == "()"