diff --git a/tutorial/c++/t11.cpp b/tutorial/c++/t11.cpp
index 5c86d19e1084605dfc63fb2b0f42bf0e3b5b3706..40ed8eac6bf9d0569243d1731d4d96dfdc8559ab 100644
--- a/tutorial/c++/t11.cpp
+++ b/tutorial/c++/t11.cpp
@@ -53,7 +53,6 @@ int main(int argc, char **argv)
   // gmsh::option::setNumber("Mesh.RecombinationAlgorithm", 2); // or 3
   // gmsh::model::mesh::generate(2);
 
-  gmsh::fltk::run();
   gmsh::finalize();
   return 0;
 }
diff --git a/tutorial/c++/t12.cpp b/tutorial/c++/t12.cpp
index 8fb2409b50132984c9b84cc705f78429f50bdb19..a9a73f5cd835f5d71c57a8ed3bc84186a3a2e211 100644
--- a/tutorial/c++/t12.cpp
+++ b/tutorial/c++/t12.cpp
@@ -53,8 +53,6 @@ int main(int argc, char **argv)
   // set compound surface from surfaces 1, 5, 10
   gmsh::model::mesh::setCompound(2, {1, 5, 10});
 
-  gmsh::fltk::run();
-
   gmsh::finalize();
 
   return 0;
diff --git a/tutorial/c++/t13.cpp b/tutorial/c++/t13.cpp
index dfc5be57dbc7891cb14e4a91132f3806607eb584..8d25e5937e0b5015b72d56363d2d9d738b23cd5a 100644
--- a/tutorial/c++/t13.cpp
+++ b/tutorial/c++/t13.cpp
@@ -62,8 +62,6 @@ int main(int argc, char **argv)
 
   gmsh::model::mesh::generate(3);
 
-  gmsh::fltk::run();
-
   gmsh::finalize();
   return 0;
 }