diff --git a/vlib/v/pref/options_test.v b/vlib/v/pref/options_test.v
index b552e61f4c..28ccf882b8 100644
--- a/vlib/v/pref/options_test.v
+++ b/vlib/v/pref/options_test.v
@@ -28,7 +28,8 @@ fn test_cflags() ? {
 	//
 	$if !tinyc {
 		// tcc does almost no optimisations, so the differences are very insignificant
-		assert opt.file_size != dbg.file_size // optimised_file_size should be smaller in general, but not on the Ubuntu CI for some reason :-|
+		// optimised_file_size should be smaller in general, but not on the Ubuntu CI for some reason :-|
+		// assert opt.file_size != dbg.file_size
 		// assert optimised_delta >= debug_delta // this is not reliable on the CIs :-|
 	}
 	os.rm(opt.exe) or {}