diff --git a/test/Jamfile.v2 b/test/Jamfile.v2
index ac61214..533e400 100644
--- a/test/Jamfile.v2
+++ b/test/Jamfile.v2
@@ -179,12 +179,12 @@ test-suite preprocessor_c_nvm
         ]
   ;
   
-# test-suite preprocessor_isempty
-#   :   
-#        [ compile isempty.cpp : <toolset>gcc:<cxxflags>-std=c++0x ]
-#        [ compile-fail isempty_variadic_standard_failure.cpp : <toolset>gcc:<cxxflags>-std=c++0x ]
-#        [ compile-fail isempty_variadic_standard_failure2.cpp : <toolset>gcc:<cxxflags>-std=c++0x ]
-#  ; 
+test-suite preprocessor_isempty
+  :   
+       [ compile isempty.cpp : <toolset>gcc:<cxxflags>-std=c++0x ]
+       [ compile-fail isempty_variadic_standard_failure.cpp : <toolset>gcc:<cxxflags>-std=c++0x ]
+       [ compile-fail isempty_variadic_standard_failure2.cpp : <toolset>gcc:<cxxflags>-std=c++0x ]
+ ; 
   
 test-suite preprocessor_isempty_nvm
    :   
@@ -193,21 +193,21 @@ test-suite preprocessor_isempty_nvm
         [ compile-fail isempty_failure2.cpp : <define>BOOST_PP_VARIADICS=0 : isempty_failure2_nvm ]
   ;
   
-# test-suite preprocessor_isempty_c
-#   :   
-#        [ compile isempty.c 
-#          : <toolset>gcc:<cflags>-std=c99
-#          : isempty_c 
-#        ]
-#        [ compile-fail isempty_variadic_standard_failure.c 
-#          : <toolset>gcc:<cflags>-std=c99
-#          : isempty_variadic_standard_failure_c 
-#        ]
-#        [ compile-fail isempty_variadic_standard_failure2.c 
-#          : <toolset>gcc:<cflags>-std=c99
-#          : isempty_variadic_standard_failure2_c 
-#        ]
-#  ;
+test-suite preprocessor_isempty_c
+  :   
+       [ compile isempty.c 
+         : <toolset>gcc:<cflags>-std=c99
+         : isempty_c 
+       ]
+       [ compile-fail isempty_variadic_standard_failure.c 
+         : <toolset>gcc:<cflags>-std=c99
+         : isempty_variadic_standard_failure_c 
+       ]
+       [ compile-fail isempty_variadic_standard_failure2.c 
+         : <toolset>gcc:<cflags>-std=c99
+         : isempty_variadic_standard_failure2_c 
+       ]
+ ;
   
 test-suite preprocessor_isempty_c_nvm
    :