diff --git a/src/lib/meta/function-closure.hpp b/src/lib/meta/function-closure.hpp
index b810bd83b..3c25f8042 100644
--- a/src/lib/meta/function-closure.hpp
+++ b/src/lib/meta/function-closure.hpp
@@ -804,8 +804,6 @@ namespace func{
   typename _Clo<SIG,ARG>::Type
   closure (SIG& f, Tuple<ARG>& args)
   {
-    typedef typename _Fun<SIG>::Ret Ret;
-    typedef typename _Sig<Ret,ARG>::Type Signature;
     typedef typename _Clo<SIG,ARG>::Type Closure;
     return Closure (f,args);
   }
diff --git a/src/proc/mobject/session/scope-path.cpp b/src/proc/mobject/session/scope-path.cpp
index f48054802..4ebc6bd28 100644
--- a/src/proc/mobject/session/scope-path.cpp
+++ b/src/proc/mobject/session/scope-path.cpp
@@ -248,7 +248,6 @@ namespace session {
   ScopePath
   commonPrefix (ScopePath const& path1, ScopePath const& path2)
   {
-    typedef std::vector<Scope>::iterator VIter;
     ScopePath prefix (ScopePath::INVALID);
     uint len = std::min (path1.length(), path2.length());
     for (uint pos = 0; pos<len; ++pos)
diff --git a/tests/core/proc/engine/testframe.cpp b/tests/core/proc/engine/testframe.cpp
index 7f46ffe44..9b404dbf5 100644
--- a/tests/core/proc/engine/testframe.cpp
+++ b/tests/core/proc/engine/testframe.cpp
@@ -252,7 +252,7 @@ namespace test   {
   {
     PseudoRandom gen(distinction_);
     for (uint i=0; i<BUFFSIZ; ++i)
-      if (data_[i] != (gen() % CHAR_MAX))
+      if (data_[i] != char(gen() % CHAR_MAX))
         return false;
     return true;
   }
@@ -262,7 +262,7 @@ namespace test   {
   {
     PseudoRandom gen(distinction_);
     for (uint i=0; i<BUFFSIZ; ++i)
-      data_[i] = (gen() % CHAR_MAX);
+      data_[i] = char(gen() % CHAR_MAX);
   }
   
   
diff --git a/tests/core/proc/mobject/session/scope-path-test.cpp b/tests/core/proc/mobject/session/scope-path-test.cpp
index b3684a2ba..8c84878db 100644
--- a/tests/core/proc/mobject/session/scope-path-test.cpp
+++ b/tests/core/proc/mobject/session/scope-path-test.cpp
@@ -244,8 +244,10 @@ namespace test    {
           CHECK (!isSameObject (path2,path3));
           CHECK (!isSameObject (path1,path3));
           
-          Scope parent = path3.moveUp();
-          CHECK (path1 == path2);
+          Scope parent = path3.moveUp(); // mutation
+          CHECK (parent == path2.getLeaf().getParent());
+          
+          CHECK (path1 == path2); // the others are not affected
           CHECK (path2 != path3);
           CHECK (path1 != path3);
           
diff --git a/tests/core/proc/mobject/session/session-modify-parts-test.cpp b/tests/core/proc/mobject/session/session-modify-parts-test.cpp
index 85e0bf611..658efce52 100644
--- a/tests/core/proc/mobject/session/session-modify-parts-test.cpp
+++ b/tests/core/proc/mobject/session/session-modify-parts-test.cpp
@@ -114,7 +114,7 @@ namespace test    {
           CHECK (fork3  == focus.getObject());
           
           RFork fork31 = sess->attach(
-              asset::Struct::retrieve (Query<asset::????> ("id(fork31)")));  ////TODO broken: we don't use a dedicated Fork asset anymore. It's just an EntryID<Fork>
+              asset::Struct::retrieve (Query<asset::???? > ("id(fork31)")));  ////TODO broken: we don't use a dedicated Fork asset anymore. It's just an EntryID<Fork>
           
           
           CHECK (fork31 == focus.getObject());
diff --git a/tests/core/proc/mobject/session/test-scopes.cpp b/tests/core/proc/mobject/session/test-scopes.cpp
index 4145f3762..4b08e1339 100644
--- a/tests/core/proc/mobject/session/test-scopes.cpp
+++ b/tests/core/proc/mobject/session/test-scopes.cpp
@@ -60,11 +60,11 @@ namespace test    {
     ID i2 = index->insert (p2,  i1 );
     ID i3 = index->insert (p3,  i2 );
     ID i4 = index->insert (p4,  i3 );
-    ID i5 = index->insert (p5,  i4 );
+            index->insert (p5,  i4 );
     
-    ID is1 = index->insert (ps1,root);
-    ID is2 = index->insert (ps2,root);
-    ID is3 = index->insert (ps3, is2);
+            index->insert (ps1,root);
+    ID is2 =index->insert (ps2,root);
+            index->insert (ps3, is2);
     
     return index;
   }
diff --git a/tests/library/meta/access-casted-test.cpp b/tests/library/meta/access-casted-test.cpp
index 7bfaa255a..a725343d1 100644
--- a/tests/library/meta/access-casted-test.cpp
+++ b/tests/library/meta/access-casted-test.cpp
@@ -75,7 +75,6 @@ namespace test {
     
     ostream& operator<< (ostream& s, const B& b) { return s << "B{} adr="<<&b<<" type: "<<tyAbbr(b); }
     ostream& operator<< (ostream& s, const D& d) { return s << "D{} adr="<<&d<<" type: "<<tyAbbr(d); }
-    ostream& operator<< (ostream& s, const E& e) { return s << "E{} adr="<<&e<<" type: "<<tyAbbr(e); }
     ostream& operator<< (ostream& s, const F& f) { return s << "F{} adr="<<&f<<" type: "<<tyAbbr(f); }
     
   }//(End)Test fixture
diff --git a/tests/library/singleton-testmock-test.cpp b/tests/library/singleton-testmock-test.cpp
index 2e1a777fb..2d00b2990 100644
--- a/tests/library/singleton-testmock-test.cpp
+++ b/tests/library/singleton-testmock-test.cpp
@@ -119,7 +119,7 @@ namespace test{
     {
       
       void
-      run (Arg arg)
+      run (Arg)
         {
           Depend<TestSingletonO> sing;
           
diff --git a/tests/library/sub-id-test.cpp b/tests/library/sub-id-test.cpp
index 1d32df42c..0c9e17534 100644
--- a/tests/library/sub-id-test.cpp
+++ b/tests/library/sub-id-test.cpp
@@ -102,7 +102,6 @@ namespace test{
       void
       checkExtension ()
         {
-          typedef SubId<Colour> CID;
           typedef SubId<uint>   UID;
           
           typedef ExtendedSubId<Colour, UID> CUID;