diff --git a/vlib/gg/draw_fns_api_test.v b/vlib/gg/draw_fns_api_test.v
index bde10a1deb..69d76d48a7 100644
--- a/vlib/gg/draw_fns_api_test.v
+++ b/vlib/gg/draw_fns_api_test.v
@@ -10,6 +10,7 @@ fn test_all_samples_can_be_compiled() {
 		res := os.execute(compile_cmd)
 		if res.exit_code != 0 {
 			eprintln('>>> FAIL $compile_cmd')
+			eprintln(res.output)
 			fails << compile_cmd
 		}
 		println('OK $compile_cmd')