diff --git a/src/rgw/rgw_dencoder.cc b/src/rgw/rgw_dencoder.cc
index 10e9961e69e..82e32958fbe 100644
--- a/src/rgw/rgw_dencoder.cc
+++ b/src/rgw/rgw_dencoder.cc
@@ -419,6 +419,34 @@ void RGWBucketInfo::generate_test_instances(list<RGWBucketInfo*>& o)
   o.push_back(new RGWBucketInfo);
 }
 
+void RGWRegion::generate_test_instances(list<RGWRegion*>& o)
+{
+  RGWRegion *r = new RGWRegion;
+  o.push_back(r);
+  o.push_back(new RGWRegion);
+}
+
+void RGWZone::generate_test_instances(list<RGWZone*> &o)
+{
+  RGWZone *z = new RGWZone;
+  o.push_back(z);
+  o.push_back(new RGWZone);
+}
+
+void RGWZoneParams::generate_test_instances(list<RGWZoneParams*> &o)
+{
+  o.push_back(new RGWZoneParams);
+  o.push_back(new RGWZoneParams); 
+}
+
+void RGWOLHInfo::generate_test_instances(list<RGWOLHInfo*> &o)
+{
+  RGWOLHInfo *olh = new RGWOLHInfo;
+  olh->removed = false;
+  o.push_back(olh);
+  o.push_back(new RGWOLHInfo);
+}
+
 void RGWBucketEnt::generate_test_instances(list<RGWBucketEnt*>& o)
 {
   RGWBucketEnt *e = new RGWBucketEnt;
diff --git a/src/rgw/rgw_rados.cc b/src/rgw/rgw_rados.cc
index b5c359fa941..13478bf7771 100644
--- a/src/rgw/rgw_rados.cc
+++ b/src/rgw/rgw_rados.cc
@@ -520,7 +520,6 @@ int RGWRegionMap::update(RGWRegion& region)
   return 0;
 }
 
-
 void RGWObjVersionTracker::prepare_op_for_read(ObjectReadOperation *op)
 {
   obj_version *check_objv = version_for_check();
diff --git a/src/rgw/rgw_rados.h b/src/rgw/rgw_rados.h
index 097f08a6ea0..7716fffe035 100644
--- a/src/rgw/rgw_rados.h
+++ b/src/rgw/rgw_rados.h
@@ -76,7 +76,7 @@ struct RGWOLHInfo {
      ::decode(removed, bl);
      DECODE_FINISH(bl);
   }
-
+  static void generate_test_instances(list<RGWOLHInfo*>& o);
   void dump(Formatter *f) const;
 };
 WRITE_CLASS_ENCODER(RGWOLHInfo)
@@ -788,6 +788,7 @@ struct RGWZoneParams {
   }
   void dump(Formatter *f) const;
   void decode_json(JSONObj *obj);
+  static void generate_test_instances(list<RGWZoneParams*>& o);
 };
 WRITE_CLASS_ENCODER(RGWZoneParams)
 
@@ -833,6 +834,7 @@ struct RGWZone {
   }
   void dump(Formatter *f) const;
   void decode_json(JSONObj *obj);
+  static void generate_test_instances(list<RGWZone*>& o);
 };
 WRITE_CLASS_ENCODER(RGWZone)
 
@@ -852,6 +854,7 @@ struct RGWDefaultRegionInfo {
   }
   void dump(Formatter *f) const;
   void decode_json(JSONObj *obj);
+  //todo: implement ceph-dencoder
 };
 WRITE_CLASS_ENCODER(RGWDefaultRegionInfo)
 
@@ -954,6 +957,7 @@ struct RGWRegion {
 
   void dump(Formatter *f) const;
   void decode_json(JSONObj *obj);
+  static void generate_test_instances(list<RGWRegion*>& o);
 };
 WRITE_CLASS_ENCODER(RGWRegion)
 
diff --git a/src/test/encoding/types.h b/src/test/encoding/types.h
index dccce4bdc58..d67c9de9eb2 100644
--- a/src/test/encoding/types.h
+++ b/src/test/encoding/types.h
@@ -235,7 +235,11 @@ TYPE(librbd::WatchNotify::ResponseMessage)
 #include "rgw/rgw_rados.h"
 TYPE(RGWObjManifestPart)
 TYPE(RGWObjManifest)
-
+TYPE(RGWOLHInfo)
+TYPE(RGWRegion)
+TYPE(RGWZone)
+TYPE(RGWZoneParams)     
+   
 #include "rgw/rgw_acl.h"
 TYPE(ACLPermission)
 TYPE(ACLGranteeType)