diff --git a/tests/suites/test_suite_debug.function b/tests/suites/test_suite_debug.function
index 227586687e..617dd8885a 100644
--- a/tests/suites/test_suite_debug.function
+++ b/tests/suites/test_suite_debug.function
@@ -201,6 +201,8 @@ void check_mbedtls_calloc_overallocation(int num, int size)
 {
     unsigned char *buf;
     buf = mbedtls_calloc((size_t) num, (size_t) size);
+    /* Dummy usage of the pointer to prevent optimizing it */
+    mbedtls_printf("calloc pointer : %p\n", buf);
     TEST_ASSERT(buf == NULL);
 
 exit: