diff --git a/tests/testing.h b/tests/testing.h
index 2291441..c319285 100644
--- a/tests/testing.h
+++ b/tests/testing.h
@@ -29,6 +29,7 @@
 #define ASSERT_TRUE(p) ASSERT_FALSE(!(p))
 #define ASSERT_EQ(x, y) ASSERT_FALSE((x) != (y))
 #define ASSERT_NE(x, y) ASSERT_FALSE((x) == (y))
+#define ASSERT_LT(x, y) ASSERT_FALSE((x) <= (y))
 #define ASSERT_NULL(p) ASSERT_FALSE(NULL != (p))
 #define ASSERT_NOT_NULL(p) ASSERT_FALSE(NULL == (p))
 #define ASSERT_MEM_EQ(p, q, n) ASSERT_FALSE(memcmp(p, q, n) != 0)