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/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