--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -296,20 +296,11 @@
   set(build_gmock ON)
 
   # This project is tested using GoogleTest.
-  add_subdirectory("third_party/googletest")
+  find_package(GTest REQUIRED)
 
   # This project uses Google benchmark for benchmarking.
   set(BENCHMARK_ENABLE_TESTING OFF CACHE BOOL "" FORCE)
   set(BENCHMARK_ENABLE_EXCEPTIONS OFF CACHE BOOL "" FORCE)
-  add_subdirectory("third_party/benchmark")
-
-  # GoogleTest triggers a missing field initializers warning.
-  if(LEVELDB_HAVE_NO_MISSING_FIELD_INITIALIZERS)
-    set_property(TARGET gtest
-        APPEND PROPERTY COMPILE_OPTIONS -Wno-missing-field-initializers)
-    set_property(TARGET gmock
-        APPEND PROPERTY COMPILE_OPTIONS -Wno-missing-field-initializers)
-  endif(LEVELDB_HAVE_NO_MISSING_FIELD_INITIALIZERS)
 
   function(leveldb_test test_file)
     get_filename_component(test_target_name "${test_file}" NAME_WE)