diff --git a/programs/conhost/tests/tty.c b/programs/conhost/tests/tty.c
index 4eb85a17a01..9b1ab77dc0b 100644
--- a/programs/conhost/tests/tty.c
+++ b/programs/conhost/tests/tty.c
@@ -1402,7 +1402,11 @@ START_TEST(tty)
     if (argc > 3)
     {
         HANDLE pipe;
+        DWORD mode;
         sscanf(argv[3], "%p", &pipe);
+        /* if std output is console, silence debug output so it does not interfere with tests */
+        if (GetConsoleMode(GetStdHandle(STD_OUTPUT_HANDLE), &mode))
+            winetest_debug = 0;
         child_process(pipe);
         return;
     }