diff --git a/src/lib/geogram/mesh/mesh_CSG.cpp b/src/lib/geogram/mesh/mesh_CSG.cpp
index 8a36804a7ce0..6e2ab9170ba2 100644
--- a/src/lib/geogram/mesh/mesh_CSG.cpp
+++ b/src/lib/geogram/mesh/mesh_CSG.cpp
@@ -900,6 +900,13 @@ namespace GEO {
             );
         }
 
+        for(index_t i=index_t(source.length())-20; i<source.length(); ++i) {
+            Logger::out("CSG check") << int(source[i])
+                                     << ": \'" << source[i]
+                                     << "\'" << std::endl;
+        }
+        
+        
         // Add the directory that contains the file to the builder's file path,
         // so that import() instructions are able to find files in the same
         // directory.
diff --git a/src/lib/geogram/mesh/mesh_surface_intersection.h b/src/lib/geogram/mesh/mesh_surface_intersection.h
index 98056dcf082e..788dbf4df389 100644
--- a/src/lib/geogram/mesh/mesh_surface_intersection.h
+++ b/src/lib/geogram/mesh/mesh_surface_intersection.h
@@ -63,7 +63,7 @@
 // exact_nt coordinates makes the algorithm  10x to 20x faster
 // and have no risk of underflow / overflow.
 #ifdef GEOGRAM_WITH_GEOGRAMPLUS
-//#define INTERSECTIONS_USE_EXACT_NT
+#define INTERSECTIONS_USE_EXACT_NT
 #endif
 
 namespace GEO {
diff --git a/tests/CSG.robot b/tests/CSG.robot
index ff604d8ae555..c32d1330d960 100644
--- a/tests/CSG.robot
+++ b/tests/CSG.robot
@@ -1,7 +1,7 @@
 *** Settings ***
 Test Setup        Prepare Test
 Test Teardown     Cleanup Test
-Force Tags        Intersect    smoke    daily    daily_valgrind
+Force Tags        CSG    smoke    daily    daily_valgrind
 Library           OperatingSystem
 Library           String
 Library           lib/VorpatestLibrary.py