diff --git a/src/unit/test_help.h b/src/unit/test_help.h
index 6fc5b4c37..ec09295a9 100644
--- a/src/unit/test_help.h
+++ b/src/unit/test_help.h
@@ -43,6 +43,8 @@
 
 #define TEST_ASSERT(_c) TEST_ASSERT_MESSAGE("Failed assertion: " #_c, _c)
 
+#ifndef UNUSED
 #define UNUSED(x) (void)(x)
+#endif
 
 #endif
diff --git a/src/unit/test_kvstore.c b/src/unit/test_kvstore.c
index 65a8389a8..7542ffc53 100644
--- a/src/unit/test_kvstore.c
+++ b/src/unit/test_kvstore.c
@@ -1,5 +1,4 @@
 #include "../kvstore.c"
-#undef UNUSED
 #include "test_help.h"
 
 uint64_t hashTestCallback(const void *key) {
diff --git a/src/unit/test_util.c b/src/unit/test_util.c
index b168442fc..c5dad630b 100644
--- a/src/unit/test_util.c
+++ b/src/unit/test_util.c
@@ -4,7 +4,6 @@
 
 #include "../config.h"
 #include "../util.h"
-#undef UNUSED
 #include "test_help.h"
 
 int test_string2ll(int argc, char **argv, int flags) {