diff --git a/.travis.yml b/.travis.yml
index ad6dc19c..fa25abea 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -26,10 +26,8 @@ addons:
     - ubuntu-toolchain-r-test
     - llvm-toolchain-precise-3.7
     packages:
-    - gcc-4.9
     - g++-4.9
     - clang-3.7
-    - valgrind
 os:
   - linux
   - osx
@@ -45,7 +43,7 @@ script: ./travis.sh
 env:
   matrix:
     - SHARED_LIB=OFF STATIC_LIB=ON CMAKE_PKG=OFF BUILD_TYPE=Debug VERBOSE=1
-    - SHARED_LIB=OFF STATIC_LIB=ON CMAKE_PKG=OFF BUILD_TYPE=Debug VERBOSE=1 CXX_FLAGS=-std=c++11
+    - SHARED_LIB=OFF STATIC_LIB=ON CMAKE_PKG=OFF BUILD_TYPE=Release VERBOSE=1 CXX_FLAGS=-std=c++11
 notifications:
   email: false
 sudo: false
diff --git a/googletest/cmake/internal_utils.cmake b/googletest/cmake/internal_utils.cmake
index ce947337..9915c11f 100644
--- a/googletest/cmake/internal_utils.cmake
+++ b/googletest/cmake/internal_utils.cmake
@@ -98,7 +98,7 @@ macro(config_compiler_and_linker)
     set(cxx_no_exception_flags "-D_HAS_EXCEPTIONS=0")
     set(cxx_no_rtti_flags "-GR-")
   elseif (CMAKE_COMPILER_IS_GNUCXX)
-    set(cxx_base_flags "-Wall -Wshadow")
+    set(cxx_base_flags "-Wall -Wshadow -Werror")
     set(cxx_exception_flags "-fexceptions")
     set(cxx_no_exception_flags "-fno-exceptions")
     # Until version 4.3.2, GCC doesn't define a macro to indicate
diff --git a/googletest/test/gtest-param-test_test.cc b/googletest/test/gtest-param-test_test.cc
index 857f6c5e..d1b0644f 100644
--- a/googletest/test/gtest-param-test_test.cc
+++ b/googletest/test/gtest-param-test_test.cc
@@ -857,8 +857,8 @@ TEST_P(CustomLambdaNamingTest, CustomTestNames) {}
 INSTANTIATE_TEST_CASE_P(CustomParamNameLambda,
                         CustomLambdaNamingTest,
                         Values(std::string("LambdaName")),
-                        [](const ::testing::TestParamInfo<std::string>& info) {
-                          return info.param;
+                        [](const ::testing::TestParamInfo<std::string>& tpinfo) {
+                          return tpinfo.param;
                         });
 
 #endif  // GTEST_LANG_CXX11
diff --git a/googletest/test/gtest_unittest.cc b/googletest/test/gtest_unittest.cc
index f84def90..745c9506 100644
--- a/googletest/test/gtest_unittest.cc
+++ b/googletest/test/gtest_unittest.cc
@@ -2096,7 +2096,7 @@ class UnitTestRecordPropertyTestEnvironment : public Environment {
 };
 
 // This will test property recording outside of any test or test case.
-static Environment* record_property_env =
+Environment* record_property_env GTEST_ATTRIBUTE_UNUSED_ =
     AddGlobalTestEnvironment(new UnitTestRecordPropertyTestEnvironment);
 
 // This group of tests is for predicate assertions (ASSERT_PRED*, etc)