diff --git a/Intersections_3/include/CGAL/Intersections_3/intersection_3_1_impl.h b/Intersections_3/include/CGAL/Intersections_3/intersection_3_1_impl.h
index b420e87cd7f..33231b775fa 100644
--- a/Intersections_3/include/CGAL/Intersections_3/intersection_3_1_impl.h
+++ b/Intersections_3/include/CGAL/Intersections_3/intersection_3_1_impl.h
@@ -673,7 +673,7 @@ inline
 bool
 do_intersect(const typename K::Sphere_3 &s,
              const typename K::Plane_3 &p,
-             const K& k)
+             const K&)
 {
   return do_intersect(p,s);
 }
diff --git a/Triangulation_2/test/Triangulation_2/test_triangulation_geom_traits.cpp b/Triangulation_2/test/Triangulation_2/test_triangulation_geom_traits.cpp
index 2f2559042c0..ee919bb9f76 100644
--- a/Triangulation_2/test/Triangulation_2/test_triangulation_geom_traits.cpp
+++ b/Triangulation_2/test/Triangulation_2/test_triangulation_geom_traits.cpp
@@ -23,13 +23,28 @@
 #include <CGAL/_test_types.h>
 
 #include <CGAL/Triangulation_euclidean_traits_2.h>
-#include <CGAL/Triangulation_euclidean_traits_xy_3.h>
-#include <CGAL/Triangulation_euclidean_traits_yz_3.h>
-#include <CGAL/Triangulation_euclidean_traits_xz_3.h>
-
+#include <CGAL/internal/Projection_traits_3.h>
 #include <CGAL/_test_traits.h>
 #include <CGAL/_test_cls_geom_traits.h>
 
+// Just define our own traits for the tests here to prevent including
+// the deprecated headers. Otherwise they trigger spurious warnings in
+// the test suite.
+
+namespace CGAL {
+template < class R >
+class Triangulation_euclidean_traits_yz_3
+  : public CGAL::internal::Projection_traits_3<R,0>
+{};
+template < class R >
+class Triangulation_euclidean_traits_xz_3
+  : public CGAL::internal::Projection_traits_3<R,1>
+{};
+template < class R >
+class Triangulation_euclidean_traits_xy_3
+  : public CGAL::internal::Projection_traits_3<R,2>
+{};
+} // CGAL
 
 int
 main()