diff --git a/Algebraic_kernel_d/test/Algebraic_kernel_d/Curve_pair_analysis_2.cpp b/Algebraic_kernel_d/test/Algebraic_kernel_d/Curve_pair_analysis_2.cpp
index bacd597afb7..3901f71ee5b 100644
--- a/Algebraic_kernel_d/test/Algebraic_kernel_d/Curve_pair_analysis_2.cpp
+++ b/Algebraic_kernel_d/test/Algebraic_kernel_d/Curve_pair_analysis_2.cpp
@@ -57,6 +57,7 @@ void test_routine() {
     typedef Integer Coefficient;
     typedef typename 
         CGAL::Polynomial_type_generator<Coefficient,1>::Type Poly_1;
+    CGAL_USE_TYPE(Poly_1);
     typedef typename 
         CGAL::Polynomial_type_generator<Coefficient,2>::Type Poly_2;
     
@@ -73,6 +74,7 @@ void test_routine() {
         Algebraic_kernel_d_1;
 
     typedef typename Algebraic_kernel_d_1::Algebraic_real_1 Algebraic_real;
+    CGAL_USE_TYPE(Algebraic_real);
 
 #if CGAL_ACK_USE_EXACUS
     typedef AcX::Algebraic_curve_2<Algebraic_kernel_d_1> Algebraic_curve_2;
diff --git a/Algebraic_kernel_d/test/Algebraic_kernel_d/include/CGAL/_test_algebraic_curve_kernel_2.h b/Algebraic_kernel_d/test/Algebraic_kernel_d/include/CGAL/_test_algebraic_curve_kernel_2.h
index 1867b45f8aa..e0058dd4c8e 100644
--- a/Algebraic_kernel_d/test/Algebraic_kernel_d/include/CGAL/_test_algebraic_curve_kernel_2.h
+++ b/Algebraic_kernel_d/test/Algebraic_kernel_d/include/CGAL/_test_algebraic_curve_kernel_2.h
@@ -94,6 +94,8 @@ void test_algebraic_curve_kernel_2() {
 
     typedef typename AK_2::Coordinate_1 Coordinate_1;
     typedef typename AK_2::Coordinate_2 Coordinate_2;
+    CGAL_USE_TYPE(Coordinate_1);
+    CGAL_USE_TYPE(Coordinate_2);
 
     Poly_2 polys[ACK_2_n_polys];
 
diff --git a/Algebraic_kernel_d/test/Algebraic_kernel_d/include/CGAL/_test_algebraic_kernel_1.h b/Algebraic_kernel_d/test/Algebraic_kernel_d/include/CGAL/_test_algebraic_kernel_1.h
index a1a3325a4af..e9c1ea8766f 100644
--- a/Algebraic_kernel_d/test/Algebraic_kernel_d/include/CGAL/_test_algebraic_kernel_1.h
+++ b/Algebraic_kernel_d/test/Algebraic_kernel_d/include/CGAL/_test_algebraic_kernel_1.h
@@ -60,6 +60,7 @@ void test_algebraic_kernel_1(const AlgebraicKernel_d_1& ak_1){
     typedef Algebraic_structure_traits<Coefficient> CAST;
     typedef typename CAST::Is_exact Is_exact;
     typedef typename CAST::Algebraic_category Algebraic_category;
+    CGAL_USE_TYPE(Algebraic_category);
     test_ak_polynomial_traits_d<Is_exact,PT>()(PT());
 
     // test not possible due to bug in test_algebraic_structure