diff --git a/test/Jamfile.v2 b/test/Jamfile.v2
index 3afe22cf..72d5b5ec 100644
--- a/test/Jamfile.v2
+++ b/test/Jamfile.v2
@@ -23,9 +23,9 @@ project
         <toolset>clang:<cxxflags>$(clang-flags)
         <toolset>msvc:<cxxflags>$(msvc-flags)
 
-        #<toolset>gcc:<warnings-as-errors>on
-        #<toolset>clang:<warnings-as-errors>on
-        #<toolset>msvc:<warnings-as-errors>on
+        <toolset>gcc:<warnings-as-errors>on
+        <toolset>clang:<warnings-as-errors>on
+        <toolset>msvc:<warnings-as-errors>on
     ;
 
 #alias framework : /boost/test//boost_unit_test_framework ;