diff --git a/trunk/src/utest/srs_utest_kernel2.cpp b/trunk/src/utest/srs_utest_kernel2.cpp
index afaf045a00..5b9ed30893 100644
--- a/trunk/src/utest/srs_utest_kernel2.cpp
+++ b/trunk/src/utest/srs_utest_kernel2.cpp
@@ -738,3 +738,9 @@ VOID TEST(KernelCodecTest, VideoFormatRbspNormal)
         EXPECT_TRUE(srs_bytes_equals(rbsp.data(), expect.data(), nb_rbsp));
     }
 }
+
+VOID TEST(KernelCodecTest, HEVCDuplicatedCode)
+{
+    EXPECT_NE(ERROR_HEVC_NALU_UEV, ERROR_STREAM_CASTER_HEVC_VPS);
+    EXPECT_NE(ERROR_HEVC_NALU_SEV, ERROR_STREAM_CASTER_HEVC_SPS);
+}