diff --git a/test/Jamfile.v2 b/test/Jamfile.v2
index edb9ac7..4993ed9 100644
--- a/test/Jamfile.v2
+++ b/test/Jamfile.v2
@@ -14,8 +14,9 @@ test-suite "assert"
         [ run assert_test.cpp ]
         [ run current_function_test.cpp : : : <test-info>always_show_run_output ]
         [ run verify_test.cpp ]
-        [ run assert_exp_test.cpp ]
-        [ run assert_msg_exp_test.cpp ]
-        [ run verify_exp_test.cpp ]
-        [ run verify_msg_exp_test.cpp ]
+        # expansion tests are in exp/ so that there is a backslash in the path on Windows
+        [ run exp/assert_exp_test.cpp ]
+        [ run exp/assert_msg_exp_test.cpp ]
+        [ run exp/verify_exp_test.cpp ]
+        [ run exp/verify_msg_exp_test.cpp ]
     ;
diff --git a/test/assert_exp_test.cpp b/test/exp/assert_exp_test.cpp
similarity index 85%
rename from test/assert_exp_test.cpp
rename to test/exp/assert_exp_test.cpp
index cf8e3cc..c56cdef 100644
--- a/test/assert_exp_test.cpp
+++ b/test/exp/assert_exp_test.cpp
@@ -13,6 +13,21 @@
 #include <boost/detail/lightweight_test.hpp>
 #include <string>
 
+// Each backslash in __FILE__ when passed through BOOST_STRINGIZE is doubled
+static std::string quote( std::string const & s )
+{
+    std::string r;
+    r.reserve( s.size() );
+
+    for( char const * p = s.c_str(); *p; ++p )
+    {
+        r += *p;
+        if( *p == '\\' ) r += *p;
+    }
+
+    return r;
+}
+
 // default case, !NDEBUG
 // BOOST_ASSERT(x) -> assert(x)
 
@@ -80,7 +95,7 @@ void test_disabled_ndebug()
 
 void test_handler()
 {
-    std::string v5 = BOOST_STRINGIZE(BOOST_ASSERT(x5)); std::string w5 = "(BOOST_LIKELY(!!(x5))? ((void)0): ::boost::assertion_failed(\"x5\", BOOST_CURRENT_FUNCTION, \"" __FILE__ "\", " BOOST_STRINGIZE(__LINE__) "))";
+    std::string v5 = BOOST_STRINGIZE(BOOST_ASSERT(x5)); std::string w5 = "(BOOST_LIKELY(!!(x5))? ((void)0): ::boost::assertion_failed(\"x5\", BOOST_CURRENT_FUNCTION, \"" + quote( __FILE__ ) + "\", " BOOST_STRINGIZE(__LINE__) "))";
 
     char const * BOOST_CURRENT_FUNCTION = "void test_handler()";
     BOOST_TEST_EQ( v5, w5 );
@@ -94,7 +109,7 @@ void test_handler()
 
 void test_handler_ndebug()
 {
-    std::string v6 = BOOST_STRINGIZE(BOOST_ASSERT(x6)); std::string w6 = "(BOOST_LIKELY(!!(x6))? ((void)0): ::boost::assertion_failed(\"x6\", BOOST_CURRENT_FUNCTION, \"" __FILE__ "\", " BOOST_STRINGIZE(__LINE__) "))";
+    std::string v6 = BOOST_STRINGIZE(BOOST_ASSERT(x6)); std::string w6 = "(BOOST_LIKELY(!!(x6))? ((void)0): ::boost::assertion_failed(\"x6\", BOOST_CURRENT_FUNCTION, \"" + quote( __FILE__ ) + "\", " BOOST_STRINGIZE(__LINE__) "))";
 
     char const * BOOST_CURRENT_FUNCTION = "void test_handler_ndebug()";
     BOOST_TEST_EQ( v6, w6 );
@@ -112,7 +127,7 @@ void test_handler_ndebug()
 
 void test_debug_handler()
 {
-    std::string v7 = BOOST_STRINGIZE(BOOST_ASSERT(x7)); std::string w7 = "(BOOST_LIKELY(!!(x7))? ((void)0): ::boost::assertion_failed(\"x7\", BOOST_CURRENT_FUNCTION, \"" __FILE__ "\", " BOOST_STRINGIZE(__LINE__) "))";
+    std::string v7 = BOOST_STRINGIZE(BOOST_ASSERT(x7)); std::string w7 = "(BOOST_LIKELY(!!(x7))? ((void)0): ::boost::assertion_failed(\"x7\", BOOST_CURRENT_FUNCTION, \"" + quote( __FILE__ ) + "\", " BOOST_STRINGIZE(__LINE__) "))";
 
     char const * BOOST_CURRENT_FUNCTION = "void test_debug_handler()";
     BOOST_TEST_EQ( v7, w7 );
diff --git a/test/assert_msg_exp_test.cpp b/test/exp/assert_msg_exp_test.cpp
similarity index 88%
rename from test/assert_msg_exp_test.cpp
rename to test/exp/assert_msg_exp_test.cpp
index ad9ab93..faff616 100644
--- a/test/assert_msg_exp_test.cpp
+++ b/test/exp/assert_msg_exp_test.cpp
@@ -13,6 +13,21 @@
 #include <boost/detail/lightweight_test.hpp>
 #include <string>
 
+// Each backslash in __FILE__ when passed through BOOST_STRINGIZE is doubled
+static std::string quote( std::string const & s )
+{
+    std::string r;
+    r.reserve( s.size() );
+
+    for( char const * p = s.c_str(); *p; ++p )
+    {
+        r += *p;
+        if( *p == '\\' ) r += *p;
+    }
+
+    return r;
+}
+
 // default case, !NDEBUG
 // BOOST_ASSERT_MSG(x,"m") -> assert((x)&&("m"))
 
@@ -80,7 +95,7 @@ void test_disabled_ndebug()
 
 void test_handler()
 {
-    std::string v5 = BOOST_STRINGIZE(BOOST_ASSERT_MSG(x5, "m5")); std::string w5 = "(BOOST_LIKELY(!!(x5))? ((void)0): ::boost::assertion_failed_msg(\"x5\", \"m5\", BOOST_CURRENT_FUNCTION, \"" __FILE__ "\", " BOOST_STRINGIZE(__LINE__) "))";
+    std::string v5 = BOOST_STRINGIZE(BOOST_ASSERT_MSG(x5, "m5")); std::string w5 = "(BOOST_LIKELY(!!(x5))? ((void)0): ::boost::assertion_failed_msg(\"x5\", \"m5\", BOOST_CURRENT_FUNCTION, \"" + quote( __FILE__ ) + "\", " BOOST_STRINGIZE(__LINE__) "))";
 
     char const * BOOST_CURRENT_FUNCTION = "void test_handler()";
     BOOST_TEST_EQ( v5, w5 );
@@ -94,7 +109,7 @@ void test_handler()
 
 void test_handler_ndebug()
 {
-    std::string v6 = BOOST_STRINGIZE(BOOST_ASSERT_MSG(x6, "m6")); std::string w6 = "(BOOST_LIKELY(!!(x6))? ((void)0): ::boost::assertion_failed_msg(\"x6\", \"m6\", BOOST_CURRENT_FUNCTION, \"" __FILE__ "\", " BOOST_STRINGIZE(__LINE__) "))";
+    std::string v6 = BOOST_STRINGIZE(BOOST_ASSERT_MSG(x6, "m6")); std::string w6 = "(BOOST_LIKELY(!!(x6))? ((void)0): ::boost::assertion_failed_msg(\"x6\", \"m6\", BOOST_CURRENT_FUNCTION, \"" + quote( __FILE__ ) + "\", " BOOST_STRINGIZE(__LINE__) "))";
 
     char const * BOOST_CURRENT_FUNCTION = "void test_handler_ndebug()";
     BOOST_TEST_EQ( v6, w6 );
@@ -112,7 +127,7 @@ void test_handler_ndebug()
 
 void test_debug_handler()
 {
-    std::string v7 = BOOST_STRINGIZE(BOOST_ASSERT_MSG(x7, "m7")); std::string w7 = "(BOOST_LIKELY(!!(x7))? ((void)0): ::boost::assertion_failed_msg(\"x7\", \"m7\", BOOST_CURRENT_FUNCTION, \"" __FILE__ "\", " BOOST_STRINGIZE(__LINE__) "))";
+    std::string v7 = BOOST_STRINGIZE(BOOST_ASSERT_MSG(x7, "m7")); std::string w7 = "(BOOST_LIKELY(!!(x7))? ((void)0): ::boost::assertion_failed_msg(\"x7\", \"m7\", BOOST_CURRENT_FUNCTION, \"" + quote( __FILE__ ) + "\", " BOOST_STRINGIZE(__LINE__) "))";
 
     char const * BOOST_CURRENT_FUNCTION = "void test_debug_handler()";
     BOOST_TEST_EQ( v7, w7 );
diff --git a/test/verify_exp_test.cpp b/test/exp/verify_exp_test.cpp
similarity index 100%
rename from test/verify_exp_test.cpp
rename to test/exp/verify_exp_test.cpp
diff --git a/test/verify_msg_exp_test.cpp b/test/exp/verify_msg_exp_test.cpp
similarity index 100%
rename from test/verify_msg_exp_test.cpp
rename to test/exp/verify_msg_exp_test.cpp