diff --git a/CMakeLists.txt b/CMakeLists.txt
index dcb42325427f16f4e43bbf737b6ad5ce39b440ea..53e985ffdcdc7f2bad68e1a9f0d4501ee60d8ff8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -85,10 +85,8 @@ add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/third_party)
 
 add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/src)
 
-# llt and gcoverage
-if (LCR_GCOV)
-    add_subdirectory(tests)
-endif()
+# ut and gcoverage
+add_subdirectory(tests)
 
 # install all files
 install(FILES ${CMAKE_BINARY_DIR}/conf/lcr.pc
diff --git a/cmake/checker.cmake b/cmake/checker.cmake
index 20ad917cf7da8f59cb16bcf3a62385824817d292..dde41a6fa856623fef586a2bec87f9c794730fee 100644
--- a/cmake/checker.cmake
+++ b/cmake/checker.cmake
@@ -69,23 +69,23 @@ find_library(LIBYAJL_LIBRARY yajl
 	HINTS ${PC_LIBYAJL_LIBDIR} ${PC_LIBYAJL_LIBRARY_DIRS})
 _CHECK(LIBYAJL_LIBRARY "LIBYAJL_LIBRARY-NOTFOUND" "libyajl.so")
 
-if (LCR_GCOV)
-    pkg_check_modules(PC_GTEST "gtest")
-    find_path(GTEST_INCLUDE_DIR gtest/gtest.h
-        HINTS ${PC_GTEST_INCLUDEDIR} ${PC_GTEST_INCLUDE_DIRS})
-    _CHECK(GTEST_INCLUDE_DIR "GTEST_INCLUDE_DIR-NOTFOUND" "gtest.h")
-    find_library(GTEST_LIBRARY gtest
-        HINTS ${PC_GTEST_LIBDIR} ${PC_GTEST_LIBRARY_DIRS})
-    _CHECK(GTEST_LIBRARY "GTEST_LIBRARY-NOTFOUND" "libgtest.so")
+pkg_check_modules(PC_GTEST "gtest")
+find_path(GTEST_INCLUDE_DIR gtest/gtest.h
+    HINTS ${PC_GTEST_INCLUDEDIR} ${PC_GTEST_INCLUDE_DIRS})
+_CHECK(GTEST_INCLUDE_DIR "GTEST_INCLUDE_DIR-NOTFOUND" "gtest.h")
+find_library(GTEST_LIBRARY gtest
+    HINTS ${PC_GTEST_LIBDIR} ${PC_GTEST_LIBRARY_DIRS})
+_CHECK(GTEST_LIBRARY "GTEST_LIBRARY-NOTFOUND" "libgtest.so")
 
-    pkg_check_modules(PC_GMOCK "gmock")
-    find_path(GMOCK_INCLUDE_DIR gmock/gmock.h
-        HINTS ${PC_GMOCK_INCLUDEDIR} ${PC_GMOCK_INCLUDE_DIRS})
-    _CHECK(GMOCK_INCLUDE_DIR "GMOCK_INCLUDE_DIR-NOTFOUND" "gmock.h")
-    find_library(GMOCK_LIBRARY z
-        HINTS ${PC_GMOCK_LIBDIR} ${PC_GMOCK_LIBRARY_DIRS})
-    _CHECK(GMOCK_LIBRARY "GMOCK_LIBRARY-NOTFOUND" "libgmock.so")
+pkg_check_modules(PC_GMOCK "gmock")
+find_path(GMOCK_INCLUDE_DIR gmock/gmock.h
+    HINTS ${PC_GMOCK_INCLUDEDIR} ${PC_GMOCK_INCLUDE_DIRS})
+_CHECK(GMOCK_INCLUDE_DIR "GMOCK_INCLUDE_DIR-NOTFOUND" "gmock.h")
+find_library(GMOCK_LIBRARY z
+    HINTS ${PC_GMOCK_LIBDIR} ${PC_GMOCK_LIBRARY_DIRS})
+_CHECK(GMOCK_LIBRARY "GMOCK_LIBRARY-NOTFOUND" "libgmock.so")
 
+if (ENABLE_GCOV)
     find_program(CMD_GCOV gcov)
     _CHECK(CMD_GCOV "CMD_GCOV-NOTFOUND" "gcov")
 
diff --git a/cmake/set_build_flags.cmake b/cmake/set_build_flags.cmake
index 9aab5e19e6062a5f13e64a8fa66f649caa09f5c0..87cab3ee59521d217a2be4c508cd6686e17c4e21 100644
--- a/cmake/set_build_flags.cmake
+++ b/cmake/set_build_flags.cmake
@@ -29,8 +29,8 @@ set(CMAKE_EXE_LINKER_FLAGS "-Wl,-E -Wl,-z,relro -Wl,-z,now -Wl,-z,noexecstack -W
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D__FILENAME__='\"$(subst ${CMAKE_SOURCE_DIR}/,,$(abspath $<))\"'")
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D__FILENAME__='\"$(subst ${CMAKE_SOURCE_DIR}/,,$(abspath $<))\"'")
 
-option(LCR_GCOV "set lcr gcov option" OFF)
-if (LCR_GCOV)
+option(ENABLE_GCOV "set lcr gcov option" OFF)
+if (ENABLE_GCOV)
     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -fprofile-arcs -ftest-coverage")
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -fprofile-arcs -ftest-coverage")
     SET(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -lgcov")
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 5e09c93662b0f4b7b1c0ccf6b614b9bf34828ea4..6ed2d955665e89ade37823ce37aa682056935cc5 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -103,10 +103,6 @@ if (CMAKE_TOOLCHAIN_FILE)
     target_link_libraries(liblcr ${EXTRAL_LINK_LIBS})
 endif()
 
-if (LCR_GCOV)
-    target_link_libraries(liblcr -lgcov)
-endif()
-
 # install all files
 install(TARGETS liblcr
   LIBRARY DESTINATION ${LIB_INSTALL_DIR_DEFAULT} PERMISSIONS OWNER_READ OWNER_EXECUTE GROUP_READ GROUP_EXECUTE)
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index ca6d164df60dbb623dcd05f1174cd71423af89bf..89eb6cf1522d925c8f9dc8c07b6a9374449959c9 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -37,8 +37,8 @@ macro(_DEFINE_NEW_TEST)
 
     target_link_libraries(${ARGV0}
         isula_libutils
-        gtest
-        -lyajl
+        ${GTEST_LIBRARY}
+        ${LIBYAJL_LIBRARY}
         pthread
         )
 
@@ -61,38 +61,48 @@ endmacro()
 
 # --------------- testcase add here -----------------
 #   api testcase
-_DEFINE_NEW_TEST(log_llt log_testcase)
-_DEFINE_NEW_TEST(json_llt json_testcase)
+_DEFINE_NEW_TEST(log_ut log_testcase)
+_DEFINE_NEW_TEST(libocispec_ut libocispec_testcase)
+
 
 # mock test for run lcov to generate html
-add_executable(mock_llt main.cpp)
-target_include_directories(mock_llt PUBLIC
+add_executable(mock_ut main.cpp)
+target_include_directories(mock_ut PUBLIC
     ${GTEST_INCLUDE_DIR}
     PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}
     )
-target_link_libraries(mock_llt
-    gtest
+target_link_libraries(mock_ut
+    ${GTEST_LIBRARY}
     pthread
     )
-add_dependencies(mock_llt log_llt json_llt)
-
-set(result isula_libutils.info)
-set(result_dir lcr_gcovs)
-set(target_dir src/CMakeFiles/isula_libutils.dir)
+add_dependencies(mock_ut log_ut libocispec_ut)
 
-# generate gcov
+# run ut and gcov
+if (ENABLE_GCOV)
+    set(result isula_libutils.info)
+    set(result_dir lcr_gcovs)
+    set(target_dir src/CMakeFiles/isula_libutils.dir)
 
-add_custom_command(TARGET mock_llt
-    POST_BUILD
-    COMMAND ${CMAKE_COMMAND} -E remove -f ${result}
-    COMMAND ${CMAKE_COMMAND} -E make_directory ${result_dir}
-    COMMAND "ctest"
-    COMMAND ${CMD_LCOV} --gcov-tool ${CMD_GCOV} --exclude "/usr/*" --exclude "*/src/utils.c" --exclude "*/json/*" -d ${CMAKE_BINARY_DIR}/${target_dir} -c -o ${result}
-    COMMAND ${CMD_GENHTML} --ignore-errors source -o ${result_dir} ${result}
-    COMMAND ${CMAKE_COMMAND} -E echo LLT finish
-    VERBATIM
-    WORKING_DIRECTORY ${CMAKE_BINARY_DIR}/tests
-    )
+    add_custom_command(TARGET mock_ut
+        POST_BUILD
+        COMMAND ${CMAKE_COMMAND} -E remove -f ${result}
+        COMMAND ${CMAKE_COMMAND} -E make_directory ${result_dir}
+        COMMAND ctest -VV
+        COMMAND ${CMD_LCOV} --gcov-tool ${CMD_GCOV} --exclude "/usr/*" --exclude "*/src/utils.c" --exclude "*/json/*" -d ${CMAKE_BINARY_DIR}/${target_dir} -c -o ${result}
+        COMMAND ${CMD_GENHTML} --ignore-errors source -o ${result_dir} ${result}
+        COMMAND ${CMAKE_COMMAND} -E echo run gcov finish
+        VERBATIM
+        WORKING_DIRECTORY ${CMAKE_BINARY_DIR}/tests
+        )
+else()
+    add_custom_command(TARGET mock_ut
+        PRE_BUILD
+        COMMAND ${CMAKE_CTEST_COMMAND} -VV
+        COMMAND ${CMAKE_COMMAND} -E echo UT finish
+        VERBATIM
+        WORKING_DIRECTORY ${CMAKE_BINARY_DIR}/tests
+        )
+endif()
 
 # --------------- testcase add finish -----------------
 
diff --git a/tests/json_llt.cpp b/tests/libocispec_ut.cpp
similarity index 97%
rename from tests/json_llt.cpp
rename to tests/libocispec_ut.cpp
index 9622ed4788424d38bf5a9c9a2a27b5cacc7ff1fd..58a1f52866e7a34949e77aed8fbfe5d519efe7dd 100644
--- a/tests/json_llt.cpp
+++ b/tests/libocispec_ut.cpp
@@ -30,7 +30,7 @@
 #include "read_file.h"
 #include "oci_runtime_hooks.h"
 
-TEST(json_testcase, test_oci_runtime_spec_hooks)
+TEST(libocispec_testcase, test_oci_runtime_spec_hooks)
 {
     const char *fname = "./ocihook.json";
     oci_runtime_spec_hooks *hooks = nullptr;
@@ -79,7 +79,7 @@ TEST(json_testcase, test_oci_runtime_spec_hooks)
     free(jstr);
 }
 
-TEST(json_testcase, test_json_readfile)
+TEST(libocispec_testcase, test_json_readfile)
 {
     const char *fname = "./ocihook.json";
     const char *not_exist = "/tmp/not_exist.json";
diff --git a/tests/log_llt.cpp b/tests/log_ut.cpp
similarity index 100%
rename from tests/log_llt.cpp
rename to tests/log_ut.cpp