diff --git a/Intersections_2/include/CGAL/Intersections_2/internal/Bbox_2_Circle_2_do_intersect.h b/Intersections_2/include/CGAL/Intersections_2/internal/Bbox_2_Circle_2_do_intersect.h
index 071dbd012a0..6306d383ef3 100644
--- a/Intersections_2/include/CGAL/Intersections_2/internal/Bbox_2_Circle_2_do_intersect.h
+++ b/Intersections_2/include/CGAL/Intersections_2/internal/Bbox_2_Circle_2_do_intersect.h
@@ -46,25 +46,25 @@ bool do_intersect_circle_box_2(const typename K::Circle_2& circle,
   FT distance = FT(0);
   Point center = circle.center();
 
-  if(center.x() < (FT)bbox.xmin())
+  if(center.x() < FT(bbox.xmin()))
   {
-    d = (FT)bbox.xmin() - center.x();
+    d = FT(bbox.xmin()) - center.x();
     distance += d * d;
   }
-  else if(center.x() > (FT)bbox.xmax())
+  else if(center.x() > FT(bbox.xmax()))
   {
-    d = center.x() - (FT)bbox.xmax();
+    d = center.x() - FT(bbox.xmax());
     distance += d * d;
   }
 
-  if(center.y() < (FT)bbox.ymin())
+  if(center.y() < FT(bbox.ymin()))
   {
-    d = (FT)bbox.ymin() - center.y();
+    d = FT(bbox.ymin()) - center.y();
     distance += d * d;
   }
-  else if(center.y() > (FT)bbox.ymax())
+  else if(center.y() > FT(bbox.ymax()))
   {
-    d = center.y() - (FT)bbox.ymax();
+    d = center.y() - FT(bbox.ymax());
     distance += d * d;
   }
 
diff --git a/Intersections_3/include/CGAL/Intersections_3/Point_3_Tetrahedron_3.h b/Intersections_3/include/CGAL/Intersections_3/Point_3_Tetrahedron_3.h
index 0e5cc9f9053..bb057a3eb7a 100644
--- a/Intersections_3/include/CGAL/Intersections_3/Point_3_Tetrahedron_3.h
+++ b/Intersections_3/include/CGAL/Intersections_3/Point_3_Tetrahedron_3.h
@@ -50,7 +50,7 @@ do_intersect(const typename K::Tetrahedron_3 &tetrahedron,
              const typename K::Point_3 &pt,
              const K&)
 {
-  return tetrahedron.has_on_unbounded_side(pt);
+  return ! tetrahedron.has_on_unbounded_side(pt);
 }
 
 
diff --git a/Intersections_3/include/CGAL/Intersections_3/internal/Tetrahedron_3_Bounded_3_do_intersect.h b/Intersections_3/include/CGAL/Intersections_3/internal/Tetrahedron_3_Bounded_3_do_intersect.h
index c5057cda77d..8470ccd03c6 100644
--- a/Intersections_3/include/CGAL/Intersections_3/internal/Tetrahedron_3_Bounded_3_do_intersect.h
+++ b/Intersections_3/include/CGAL/Intersections_3/internal/Tetrahedron_3_Bounded_3_do_intersect.h
@@ -51,7 +51,7 @@ do_intersect(const typename K::Tetrahedron_3 &tet,
 typename K::Boolean
 do_intersect_tetrahedron_bounded(const Bounded &tr,
                                  const typename K::Tetrahedron_3 &tet,
-                                 const typename K::Point_3 p,
+                                 const typename K::Point_3 &p,
                                  const K & k)
 {
     typedef typename K::Triangle_3 Triangle;
diff --git a/Intersections_3/test/Intersections_3/CMakeLists.txt b/Intersections_3/test/Intersections_3/CMakeLists.txt
index 06c728fffe6..4ed3ff0c953 100644
--- a/Intersections_3/test/Intersections_3/CMakeLists.txt
+++ b/Intersections_3/test/Intersections_3/CMakeLists.txt
@@ -21,7 +21,6 @@ if ( CGAL_FOUND )
   foreach(cppfile ${cppfiles})
     create_single_source_cgal_program( "${cppfile}" )
   endforeach()
-  
 else()
   
     message(STATUS "This program requires the CGAL library, and will not be compiled.")
diff --git a/Intersections_3/test/Intersections_3/test_point_3_intersections.cpp b/Intersections_3/test/Intersections_3/test_point_3_intersections.cpp
index 8dbfd3efe10..447d5c0907d 100644
--- a/Intersections_3/test/Intersections_3/test_point_3_intersections.cpp
+++ b/Intersections_3/test/Intersections_3/test_point_3_intersections.cpp
@@ -89,6 +89,25 @@ void test_P_Pl()
   assert(res == p);
 }
 
+template<typename K>
+void test_P_Tet()
+{
+  typedef CGAL::Point_3<K> P;
+  typedef CGAL::Tetrahedron_3<K> T;
+  P p(0,0,0), q(1,0,0), r(1,1,0), s(0,0,1);
+  T t(p,q,r,s);
+  P q0(0.1, 0.1, 0.1), q1(10,10,10);
+
+  assert(CGAL::do_intersect(p,t));
+  assert(CGAL::do_intersect(t,p));
+  
+  assert(CGAL::do_intersect(q0,t));
+  assert(CGAL::do_intersect(t,q0));
+  
+  assert(! CGAL::do_intersect(q1,t));
+  assert(! CGAL::do_intersect(t,q1));
+}
+
 int main()
 {
   test_P_Cub<Epick>();
@@ -99,7 +118,6 @@ int main()
 
   test_P_R<Epick>();
   test_P_R<Epeck>();
-
   test_P_S<Epick>();
   test_P_S<Epeck>();
 
@@ -108,6 +126,9 @@ int main()
 
   test_P_Pl<Epick>();
   test_P_Pl<Epeck>();
+  
+  test_P_Tet<Epick>();
+  test_P_Tet<Epeck>();
 }
 #include <iostream>