diff --git a/tests/test_generated_code.c b/tests/test_generated_code.c
index 9cd5db7a5b..ba508245e5 100644
--- a/tests/test_generated_code.c
+++ b/tests/test_generated_code.c
@@ -8,7 +8,6 @@
 #include "tests/test.upb.h"
 
 #define MIN(x, y) ((x) < (y) ? (x) : (y))
-#define UNUSED(x) (void)x
 
 const char test_str[] = "abcdefg";
 const char test_str2[] = "12345678910";