diff --git a/src/test/librados_test_stub/LibradosTestStub.cc b/src/test/librados_test_stub/LibradosTestStub.cc
index d56001e2cebcd..734ebaa4325fd 100644
--- a/src/test/librados_test_stub/LibradosTestStub.cc
+++ b/src/test/librados_test_stub/LibradosTestStub.cc
@@ -1216,3 +1216,12 @@ int cls_register_cxx_method(cls_handle_t hclass, const char *method,
   librados::TestClassHandler *cls = get_class_handler();
   return cls->create_method(hclass, method, class_call, handle);
 }
+
+int cls_register_cxx_filter(cls_handle_t hclass,
+                            const std::string &filter_name,
+                            cls_cxx_filter_factory_t fn,
+                            cls_filter_handle_t *)
+{
+  librados::TestClassHandler *cls = get_class_handler();
+  return cls->create_filter(hclass, filter_name, fn);
+}
diff --git a/src/test/librados_test_stub/TestClassHandler.cc b/src/test/librados_test_stub/TestClassHandler.cc
index bf6634dbf022c..3d3e5780a8bd9 100644
--- a/src/test/librados_test_stub/TestClassHandler.cc
+++ b/src/test/librados_test_stub/TestClassHandler.cc
@@ -120,6 +120,18 @@ TestClassHandler::SharedMethodContext TestClassHandler::get_method_context(
   return ctx;
 }
 
+int TestClassHandler::create_filter(cls_handle_t hclass,
+				    const std::string& name,
+				    cls_cxx_filter_factory_t fn)
+{
+  Class *cls = reinterpret_cast<Class*>(hclass);
+  if (cls->filters.find(name) != cls->filters.end()) {
+    return -EEXIST;
+  }
+  cls->filters[name] = fn;
+  return 0;
+}
+
 TestClassHandler::MethodContext::~MethodContext() {
   io_ctx_impl->put();
 }
diff --git a/src/test/librados_test_stub/TestClassHandler.h b/src/test/librados_test_stub/TestClassHandler.h
index e25db273ae23c..df273364d3066 100644
--- a/src/test/librados_test_stub/TestClassHandler.h
+++ b/src/test/librados_test_stub/TestClassHandler.h
@@ -36,9 +36,11 @@ class TestClassHandler {
   };
   typedef boost::shared_ptr<Method> SharedMethod;
   typedef std::map<std::string, SharedMethod> Methods;
+  typedef std::map<std::string, cls_cxx_filter_factory_t> Filters;
 
   struct Class {
     Methods methods;
+    Filters filters;
   };
   typedef boost::shared_ptr<Class> SharedClass;
 
@@ -54,6 +56,9 @@ class TestClassHandler {
                                          const std::string &oid,
                                          const SnapContext &snapc);
 
+  int create_filter(cls_handle_t hclass, const std::string& filter_name,
+		    cls_cxx_filter_factory_t fn);
+
 private:
 
   typedef std::map<std::string, SharedClass> Classes;
@@ -61,6 +66,7 @@ class TestClassHandler {
 
   Classes m_classes;
   ClassHandles m_class_handles;
+  Filters m_filters;
 
   void open_class(const std::string& name, const std::string& path);