diff --git a/tests/threads.c b/tests/threads.c
index 75fa8802..78519c73 100644
--- a/tests/threads.c
+++ b/tests/threads.c
@@ -124,6 +124,9 @@ int main(void)
         }
     }
 
+    for (i = 0;  i < count;  i++)
+        glfwHideWindow(threads[i].window);
+
     for (i = 0;  i < count;  i++)
         thrd_join(threads[i].id, &result);