diff --git a/test/detail/test_function.cpp b/test/detail/test_function.cpp
index e378a30..4bb2559 100644
--- a/test/detail/test_function.cpp
+++ b/test/detail/test_function.cpp
@@ -16,6 +16,34 @@
 #include <boost/function.hpp>
 #include <boost/bind.hpp>
 
+namespace
+{
+    struct error_fixture
+    {
+        error_fixture()
+        {
+            data().reset();
+        }
+        ~error_fixture()
+        {
+            BOOST_CHECK( data().verify() );
+            BOOST_CHECK_EQUAL( 0, data().call_count );
+        }
+    };
+}
+
+#define CHECK_CALLS( calls ) \
+    BOOST_CHECK_EQUAL( calls, data().call_count ); \
+    data().call_count = 0;
+#define CHECK_ERROR( expr, error, calls, context ) \
+    BOOST_CHECK( data().verify() ); \
+    try { expr; } catch( ... ) {} \
+    BOOST_CHECK_EQUAL( 1, data().error_count ); \
+    BOOST_CHECK_EQUAL( error, data().last_message ); \
+    BOOST_CHECK_EQUAL( context, data().last_context ); \
+    CHECK_CALLS( calls ); \
+    data().reset();
+
 // static
 
 namespace
diff --git a/test/mock_error.hpp b/test/mock_error.hpp
index 7f2d7a8..5730df8 100644
--- a/test/mock_error.hpp
+++ b/test/mock_error.hpp
@@ -87,31 +87,6 @@ namespace
                 boost::lexical_cast< std::string >( context ), file, line );
         }
     };
-
-    struct error_fixture
-    {
-        error_fixture()
-        {
-            data().reset();
-        }
-        ~error_fixture()
-        {
-            BOOST_CHECK( data().verify() );
-            BOOST_CHECK_EQUAL( 0, data().call_count );
-        }
-    };
 }
 
-#define CHECK_CALLS( calls ) \
-    BOOST_CHECK_EQUAL( calls, data().call_count ); \
-    data().call_count = 0;
-#define CHECK_ERROR( expr, error, calls, context ) \
-    BOOST_CHECK( data().verify() ); \
-    try { expr; } catch( ... ) {} \
-    BOOST_CHECK_EQUAL( 1, data().error_count ); \
-    BOOST_CHECK_EQUAL( error, data().last_message ); \
-    BOOST_CHECK_EQUAL( context, data().last_context ); \
-    CHECK_CALLS( calls ); \
-    data().reset();
-
 #endif // MOCK_TEST_MOCK_ERROR_HPP_INCLUDED