diff --git a/Segment_Delaunay_graph_Linf_2/test/Segment_Delaunay_graph_Linf_2/test_sdg_linf_2_et.cpp b/Segment_Delaunay_graph_Linf_2/test/Segment_Delaunay_graph_Linf_2/test_sdg_linf_2_et.cpp
index a53b491851c..43c4de102d9 100644
--- a/Segment_Delaunay_graph_Linf_2/test/Segment_Delaunay_graph_Linf_2/test_sdg_linf_2_et.cpp
+++ b/Segment_Delaunay_graph_Linf_2/test/Segment_Delaunay_graph_Linf_2/test_sdg_linf_2_et.cpp
@@ -11,10 +11,9 @@
 #include <cassert>
 
 #include <CGAL/Exact_rational.h>
-#include <CGAL/Exact_integer.h>
 
 // choose number type
-typedef CGAL::Exact_integer exact_ring_t;
+typedef CGAL::Exact_rational exact_ring_t;
 typedef CGAL::Exact_rational exact_field_t;
 
 namespace CGAL {
diff --git a/Segment_Delaunay_graph_Linf_2/test/Segment_Delaunay_graph_Linf_2/test_sdg_linf_2_ft.cpp b/Segment_Delaunay_graph_Linf_2/test/Segment_Delaunay_graph_Linf_2/test_sdg_linf_2_ft.cpp
index 1030d7a135b..961eaa43605 100644
--- a/Segment_Delaunay_graph_Linf_2/test/Segment_Delaunay_graph_Linf_2/test_sdg_linf_2_ft.cpp
+++ b/Segment_Delaunay_graph_Linf_2/test/Segment_Delaunay_graph_Linf_2/test_sdg_linf_2_ft.cpp
@@ -11,10 +11,9 @@
 #include <cassert>
 
 #include <CGAL/Exact_rational.h>
-#include <CGAL/Exact_integer.h>
 
 // choose number type
-typedef CGAL::Exact_integer exact_ring_t;
+typedef CGAL::Exact_rational exact_ring_t;
 typedef CGAL::Exact_rational exact_field_t;
 
 #include <CGAL/Simple_cartesian.h>
diff --git a/Segment_Delaunay_graph_Linf_2/test/Segment_Delaunay_graph_Linf_2/test_sdg_linf_hierarchy_2_et.cpp b/Segment_Delaunay_graph_Linf_2/test/Segment_Delaunay_graph_Linf_2/test_sdg_linf_hierarchy_2_et.cpp
index 50a1bdd0e34..8b9733164a2 100644
--- a/Segment_Delaunay_graph_Linf_2/test/Segment_Delaunay_graph_Linf_2/test_sdg_linf_hierarchy_2_et.cpp
+++ b/Segment_Delaunay_graph_Linf_2/test/Segment_Delaunay_graph_Linf_2/test_sdg_linf_hierarchy_2_et.cpp
@@ -11,10 +11,9 @@
 #include <cassert>
 
 #include <CGAL/Exact_rational.h>
-#include <CGAL/Exact_integer.h>
 
 // choose number type
-typedef CGAL::Exact_integer exact_ring_t;
+typedef CGAL::Exact_rational exact_ring_t;
 typedef CGAL::Exact_rational exact_field_t;
 
 namespace CGAL {
diff --git a/Segment_Delaunay_graph_Linf_2/test/Segment_Delaunay_graph_Linf_2/test_sdg_linf_hierarchy_2_ft.cpp b/Segment_Delaunay_graph_Linf_2/test/Segment_Delaunay_graph_Linf_2/test_sdg_linf_hierarchy_2_ft.cpp
index 3e16425979c..ed6565c1997 100644
--- a/Segment_Delaunay_graph_Linf_2/test/Segment_Delaunay_graph_Linf_2/test_sdg_linf_hierarchy_2_ft.cpp
+++ b/Segment_Delaunay_graph_Linf_2/test/Segment_Delaunay_graph_Linf_2/test_sdg_linf_hierarchy_2_ft.cpp
@@ -11,10 +11,9 @@
 #include <cassert>
 
 #include <CGAL/Exact_rational.h>
-#include <CGAL/Exact_integer.h>
 
 // choose number type
-typedef CGAL::Exact_integer exact_ring_t;
+typedef CGAL::Exact_rational exact_ring_t;
 typedef CGAL::Exact_rational exact_field_t;
 
 #include <CGAL/Simple_cartesian.h>