diff --git a/tests/lattice/2d_triangular_lattice.c b/tests/lattice/2d_triangular_lattice.c
index e56915c..c7451e1 100644
--- a/tests/lattice/2d_triangular_lattice.c
+++ b/tests/lattice/2d_triangular_lattice.c
@@ -36,7 +36,7 @@ int main() {
   triangular_lattice_gen_free(g);
 
 
-  g = triangular_lattice_gen_init(7, TRIANGULAR_HORIZONTAL, true);
+  g = triangular_lattice_gen_init(7, TRIANGULAR_VERTICAL, true);
   triangular_lattice_gen_extend_to_steps(g, 7);
   dump_points2d_rordered(&(g->ps), "triang_v_s7.out");
   p = points2d_rordered_scale(&(g->ps), 1/7.);