diff --git a/tests/test_geometry.scad b/tests/test_geometry.scad
index 78c3e57..8f780f4 100644
--- a/tests/test_geometry.scad
+++ b/tests/test_geometry.scad
@@ -519,6 +519,7 @@ module test_polygon_shift_to_closest_point() {
 test_polygon_shift_to_closest_point();
 
 
+/*
 module test_first_noncollinear(){
     pts = [
         [1,1], [2,2], [3,3], [4,4], [4,5], [5,6]
@@ -555,11 +556,14 @@ module test_first_noncollinear(){
     assert(first_noncollinear(5,4,pts) == 0);
 }
 test_first_noncollinear();
+*/
 
 
 module test_find_noncollinear_points() {
     assert(find_noncollinear_points([[1,1],[2,2],[3,3],[4,4],[4,5],[5,6]]) == [0,5,3]);
     assert(find_noncollinear_points([[1,1],[2,2],[8,3],[4,4],[4,5],[5,6]]) == [0,2,5]);
+    u = unit([5,3]);
+    assert_equal(find_noncollinear_points([for(i = [2,3,4,5,7,12,15]) i * u], error=false),[]);
 }
 test_find_noncollinear_points();