diff --git a/tests/lib/libc/test_memcmp.cpp b/tests/lib/libc/test_memcmp.cpp
new file mode 100644
index 0000000..b4eb293
--- /dev/null
+++ b/tests/lib/libc/test_memcmp.cpp
@@ -0,0 +1,18 @@
+/*
+ * Copyright (c) 2019, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include "CppUTest/TestHarness.h"
+extern "C" {
+#include "lib/libc/string.h"
+}
+
+TEST_GROUP(memcmp) {
+
+};
+
+TEST(memcmp, empty) {
+	LONGS_EQUAL(0, memcmp(NULL, NULL, 0))
+}