diff --git a/tests/uris/url.cpp b/tests/uris/url.cpp
index abc33dee1d..57c556c636 100644
--- a/tests/uris/url.cpp
+++ b/tests/uris/url.cpp
@@ -79,7 +79,7 @@ void URLTestCase::GetInputStream()
     wxMemoryOutputStream ostream;
     CPPUNIT_ASSERT(in_stream->Read(ostream).GetLastError() == wxSTREAM_EOF);
 
-    CPPUNIT_ASSERT_EQUAL(13677, ostream.GetSize());
+    CPPUNIT_ASSERT_EQUAL(17334, ostream.GetSize());
 
     // we have to delete the object created by GetInputStream()
     delete in_stream;