diff --git a/src/proc/mobject/placement-index.cpp b/src/proc/mobject/placement-index.cpp
index 38758d80e..ac6bbb279 100644
--- a/src/proc/mobject/placement-index.cpp
+++ b/src/proc/mobject/placement-index.cpp
@@ -59,7 +59,6 @@ namespace mobject {
   
   
   /* some type shorthands */
-  typedef shared_ptr<PlacementIndex> PIdx;
   typedef PlacementIndex::PlacementMO PlacementMO; 
   typedef PlacementIndex::PRef PRef;
   typedef PlacementIndex::ID ID;
@@ -146,9 +145,9 @@ namespace mobject {
   
   namespace { // implementation detail: default global placement index access
     
-    PIdx globalIndex;
+    PPIdx globalIndex;
     
-    PIdx const&
+    PPIdx const&
     getGlobalIndex()
     {
       if (globalIndex)
@@ -164,7 +163,7 @@ namespace mobject {
   
   
   void
-  reset_PlacementIndex (PIdx const& alternativeIndex)
+  reset_PlacementIndex (PPIdx const& alternativeIndex)
   {
     globalIndex = alternativeIndex;
   }
diff --git a/src/proc/mobject/placement-index.hpp b/src/proc/mobject/placement-index.hpp
index 5d9da5ff7..362ad7c8b 100644
--- a/src/proc/mobject/placement-index.hpp
+++ b/src/proc/mobject/placement-index.hpp
@@ -116,13 +116,16 @@ namespace mobject {
     };
   ////////////////TODO currently just fleshing  out the API; probably have to split off an impl.class; but for now a PImpl is sufficient...
   
+    
+  typedef shared_ptr<PlacementIndex> PPIdx;
+
   
   
   /** @internal there is an implicit PlacementIndex available on a global scale,
    *            by default implemented within the current session. This function allows
    *            to re-define this implicit index temporarily, e.g. for unit tests. */
   void
-  reset_PlacementIndex(shared_ptr<PlacementIndex> const&) ;
+  reset_PlacementIndex(PPIdx const&) ;
   
   /** @internal restore the implicit PlacementIndex to its default implementation (=the session) */
   void
diff --git a/tests/components/proc/mobject/placement-scope-test.cpp b/tests/components/proc/mobject/placement-scope-test.cpp
index cac6cc14b..86c51b184 100644
--- a/tests/components/proc/mobject/placement-scope-test.cpp
+++ b/tests/components/proc/mobject/placement-scope-test.cpp
@@ -69,7 +69,7 @@ namespace test    {
       run (Arg) 
         {
           // Prepare an (test)Index backing the PlacementRefs
-          PIdx index = build_testScopes();
+          PPIdx index = build_testScopes();
           
           UNIMPLEMENTED ("function test of placement scope interface");
           verifyLookup (index);
diff --git a/tests/components/proc/mobject/query-focus-test.cpp b/tests/components/proc/mobject/query-focus-test.cpp
index 4500c0db6..f3253af4b 100644
--- a/tests/components/proc/mobject/query-focus-test.cpp
+++ b/tests/components/proc/mobject/query-focus-test.cpp
@@ -61,7 +61,7 @@ namespace test    {
         {
           
           // Prepare an (test)Index backing the PlacementRefs
-          PIdx index = build_testScopes();
+          PPIdx index = build_testScopes();
 //          PMO& root = index->getRoot();
           
           UNIMPLEMENTED ("unit test to cover query focus management");
diff --git a/tests/components/proc/mobject/scope-path-test.cpp b/tests/components/proc/mobject/scope-path-test.cpp
index 817883c4b..cc05c1d3f 100644
--- a/tests/components/proc/mobject/scope-path-test.cpp
+++ b/tests/components/proc/mobject/scope-path-test.cpp
@@ -62,7 +62,7 @@ namespace test    {
       run (Arg) 
         {
           // Prepare an (test)Index backing the PlacementRefs
-          PIdx index = build_testScopes();
+          PPIdx index = build_testScopes();
           
           UNIMPLEMENTED ("unit test regarding placement scope handling");
         }
diff --git a/tests/components/proc/mobject/session/test-scopes.cpp b/tests/components/proc/mobject/session/test-scopes.cpp
index 0b58081d5..b1cab5cf2 100644
--- a/tests/components/proc/mobject/session/test-scopes.cpp
+++ b/tests/components/proc/mobject/session/test-scopes.cpp
@@ -57,17 +57,21 @@ namespace test    {
    *        test PlacementIndex will be cleared automatically, and the
    *        default Index within the session will be re-activated. 
    */
-  PIdx
+  PPIdx
   build_testScopes()
   {
-    PSub p1(*new TestSubMO21);
-    PSub p2(*new TestSubMO21);
-    PSub p3(*new TestSubMO21);
-    PSub p4(*new TestSubMO21);
-    PSub p5(*new TestSubMO21);
+    PDum p1(*new TestSubMO21);
+    PDum p2(*new TestSubMO21);
+    PDum p3(*new TestSubMO21);
+    PDum p4(*new TestSubMO21);
+    PDum p5(*new TestSubMO21);
+    
+    PDum ps1(*new DummyMO);
+    PDum ps2(*new TestSubMO1);
+    PDum ps2(*new TestSubMO2);
     
     // Prepare an (test)Index backing the PlacementRefs
-    PIdx index (PlacementIndex::create().get(), &remove_testIndex); // taking ownership
+    PPIdx index (PlacementIndex::create().get(), &remove_testIndex); // taking ownership
     reset_PlacementIndex(index);
     PMO& root = index->getRoot();
 
@@ -77,6 +81,10 @@ namespace test    {
     index->insert (p4,  p3 );
     index->insert (p5,  p4 );
     
+    index->insert (ps1,root);
+    index->insert (ps2,root);
+    index->insert (ps3,root);
+    
     return index;
   }
   
diff --git a/tests/components/proc/mobject/session/test-scopes.hpp b/tests/components/proc/mobject/session/test-scopes.hpp
index 760ab0d75..bb9690902 100644
--- a/tests/components/proc/mobject/session/test-scopes.hpp
+++ b/tests/components/proc/mobject/session/test-scopes.hpp
@@ -50,8 +50,7 @@ namespace test    {
   using std::tr1::shared_ptr;
 
   using namespace mobject::test;
-  typedef TestPlacement<TestSubMO21> PSub;
-  typedef shared_ptr<PlacementIndex> PIdx;
+  typedef TestPlacement<DummyMO> PDum;
   
   
   
@@ -65,7 +64,7 @@ namespace test    {
    * @see session::SessManagerImpl::getCurrentIndex()
    * @see mobject::reset_PlacementIndex
    */
-  PIdx build_testScopes();
+  PPIdx build_testScopes();
   
   
 }}} // namespace mobject::session::test