diff --git a/.travis.yml b/.travis.yml
index a409e36..e8f6bb0 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -16,20 +16,18 @@ branches:
     - develop
 
 install:
-  - git clone -b $TRAVIS_BRANCH https://github.com/boostorg/boost.git boost
-  - cd boost
+  - cd ..
+  - git clone -b $TRAVIS_BRANCH https://github.com/boostorg/boost.git boost-root
+  - cd boost-root
   - git submodule init libs/assert
   - git submodule init libs/config
-  - git submodule init libs/core
   - git submodule init libs/predef
   - git submodule init libs/static_assert
   - git submodule init libs/type_traits
   - git submodule init tools/build
   - git submodule init tools/inspect
   - git submodule update
-  - cd libs/core
-  - git checkout -q $TRAVIS_COMMIT
-  - cd ../..
+  - cp -r $TRAVIS_BUILD_DIR/* libs/core
   - ./bootstrap.sh
   - ./b2 headers
 
@@ -37,3 +35,7 @@ script:
   - TOOLSET=gcc,clang
   - if [ $TRAVIS_OS_NAME == osx ]; then TOOLSET=clang; fi
   - ./b2 libs/core/test toolset=$TOOLSET
+
+notifications:
+  email:
+    on_success: always
diff --git a/appveyor.yml b/appveyor.yml
index d9d2ca5..6644d6d 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -12,24 +12,22 @@ branches:
     - develop
 
 install:
-  - git clone -b %APPVEYOR_REPO_BRANCH% https://github.com/boostorg/boost.git boost
-  - cd boost
+  - cd ..
+  - git clone -b %APPVEYOR_REPO_BRANCH% https://github.com/boostorg/boost.git boost-root
+  - cd boost-root
   - git submodule init libs/assert
   - git submodule init libs/config
-  - git submodule init libs/core
   - git submodule init libs/predef
   - git submodule init libs/static_assert
   - git submodule init libs/type_traits
   - git submodule init tools/build
   - git submodule init tools/inspect
   - git submodule update
-  - cd libs\core
-  - git checkout -q %APPVEYOR_REPO_COMMIT%
-  - cd ..\..
+  - xcopy /s /e /q %APPVEYOR_BUILD_FOLDER% libs\core
   - bootstrap
   - b2 headers
 
 build: off
 
 test_script:
-  - b2 libs/core/test toolset=msvc-9.0,msvc-10.0,msvc-11.0,msvc-12.0
+  - b2 libs/core/test toolset=msvc-9.0,msvc-10.0,msvc-11.0,msvc-14.0
diff --git a/doc/lightweight_test.qbk b/doc/lightweight_test.qbk
index 7b706c3..4b9abd1 100644
--- a/doc/lightweight_test.qbk
+++ b/doc/lightweight_test.qbk
@@ -32,6 +32,7 @@ When using `lightweight_test.hpp`, *do not forget* to
 
 ``
 #define BOOST_TEST(expression) /*unspecified*/
+#define BOOST_TEST_NOT(expression) /*unspecified*/
 #define BOOST_ERROR(message) /*unspecified*/
 #define BOOST_TEST_EQ(expr1, expr2) /*unspecified*/
 #define BOOST_TEST_NE(expr1, expr2) /*unspecified*/
@@ -56,6 +57,17 @@ message containing `expression`.
 
 [endsect]
 
+[section BOOST_TEST_NOT]
+
+``
+BOOST_TEST_NOT(expression)
+``
+
+If expression is true increases the error count and outputs a
+message containing `!(expression)`.
+
+[endsect]
+
 [section BOOST_ERROR]
 
 ``
diff --git a/include/boost/core/lightweight_test.hpp b/include/boost/core/lightweight_test.hpp
index cdc8a72..e0fc90b 100644
--- a/include/boost/core/lightweight_test.hpp
+++ b/include/boost/core/lightweight_test.hpp
@@ -144,6 +144,7 @@ inline int report_errors()
 } // namespace boost
 
 #define BOOST_TEST(expr) ((expr)? (void)0: ::boost::detail::test_failed_impl(#expr, __FILE__, __LINE__, BOOST_CURRENT_FUNCTION))
+#define BOOST_TEST_NOT(expr) BOOST_TEST(!(expr))
 
 #define BOOST_ERROR(msg) ( ::boost::detail::error_impl(msg, __FILE__, __LINE__, BOOST_CURRENT_FUNCTION) )
 
diff --git a/test/lightweight_test_test.cpp b/test/lightweight_test_test.cpp
index a5193f2..d4808a1 100644
--- a/test/lightweight_test_test.cpp
+++ b/test/lightweight_test_test.cpp
@@ -43,6 +43,16 @@ int main()
     BOOST_TEST( x++ == 1 );
     BOOST_TEST( x == 2? true: false );
     BOOST_TEST( x == 2? &x: 0 );
+    
+    // BOOST_TEST_NOT
+    
+    BOOST_TEST_NOT( x == 1 );
+    BOOST_TEST_NOT( ++x == 2 );
+    BOOST_TEST_NOT( x++ == 2 );
+    BOOST_TEST_NOT( --x == 2 );
+    BOOST_TEST_NOT( x-- == 2 );
+    BOOST_TEST_NOT( x == 2? false: true );
+    BOOST_TEST_NOT( x == 2? 0: &x );
 
     // BOOST_TEST_EQ