diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 00e15e5..74ec5d5 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -31,6 +31,9 @@
 
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-unused-function -Wno-unused-value")
 set(CMAKE_C_FLAGS_CHECK "${CMAKE_C_FLAGS_CHECK} -Wno-unused-function -Wno-unused-value")
+if(CMAKE_COMPILER_IS_CLANG)
+    set(CMAKE_C_FLAGS_CHECK "${CMAKE_C_FLAGS_CHECK} -Wno-unreachable-code")
+endif(CMAKE_COMPILER_IS_CLANG)
 
 add_test_suite(aes aes.ecb)
 add_test_suite(aes aes.cbc)