diff --git a/test/test_functional/test_prepare-parser.py b/test/test_functional/test_prepare-parser.py
index e9caf50b94a0dfbf3eba9f456fcd06049945cc7e..adfc393e6b3b0f51129a390d297530ffd18c425b 100644
--- a/test/test_functional/test_prepare-parser.py
+++ b/test/test_functional/test_prepare-parser.py
@@ -211,7 +211,7 @@ def test_parser_more_threads(capsys):
     parser = argparse.ArgumentParser(description="Prepare", add_help=False)
     prepare.build_parser(parser)
     with pytest.raises(SystemExit):
-        prepare.parse(parser, "-p 50".split())
+        prepare.parse(parser, "-p 3000".split())
     _, err = capsys.readouterr()
     assert (f"You have {nb_cpu} threads on your computer, you cannot ask for more: "
             "invalid value: 50") in err