diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -26,7 +26,7 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-cmake_minimum_required(VERSION 3.1)
+cmake_minimum_required(VERSION 3.5)
 project(Snappy VERSION 1.2.1 LANGUAGES C CXX)
 
 # C++ standard can be overridden when this is used as a sub-project.
@@ -319,34 +319,12 @@
 if(SNAPPY_BUILD_TESTS)
   enable_testing()
 
-  # Prevent overriding the parent project's compiler/linker settings on Windows.
-  set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
-  set(install_gtest OFF)
-  set(install_gmock OFF)
-  set(build_gmock ON)
-
-  # This project is tested using GoogleTest.
-  add_subdirectory("third_party/googletest")
-
-  # GoogleTest triggers a missing field initializers warning.
-  if(SNAPPY_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(SNAPPY_HAVE_NO_MISSING_FIELD_INITIALIZERS)
-
-  if(SNAPPY_HAVE_NO_IMPLICIT_INT_FLOAT_CONVERSION)
-    set_property(TARGET gtest
-        APPEND PROPERTY COMPILE_OPTIONS -Wno-implicit-int-float-conversion)
-  endif(SNAPPY_HAVE_NO_IMPLICIT_INT_FLOAT_CONVERSION)
-
   add_executable(snappy_unittest "")
   target_sources(snappy_unittest
     PRIVATE
       "snappy_unittest.cc"
   )
-  target_link_libraries(snappy_unittest snappy_test_support gmock_main gtest)
+  target_link_libraries(snappy_unittest snappy_test_support gtest_main gtest)
 
   add_test(
     NAME snappy_unittest
@@ -361,20 +339,6 @@
   target_link_libraries(snappy_test_tool snappy_test_support)
 endif(SNAPPY_BUILD_TESTS)
 
-if(SNAPPY_BUILD_BENCHMARKS)
-  add_executable(snappy_benchmark "")
-  target_sources(snappy_benchmark
-    PRIVATE
-      "snappy_benchmark.cc"
-  )
-  target_link_libraries(snappy_benchmark snappy_test_support benchmark_main)
-
-  # 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")
-endif(SNAPPY_BUILD_BENCHMARKS)
-
 if(SNAPPY_FUZZING_BUILD)
   add_executable(snappy_compress_fuzzer "")
   target_sources(snappy_compress_fuzzer