diff --git a/tests/test_geometry.scad b/tests/test_geometry.scad
index 9b15c4d8..f04687ed 100644
--- a/tests/test_geometry.scad
+++ b/tests/test_geometry.scad
@@ -269,8 +269,8 @@ module test_plane_closest_point(){
 module test_line_from_points() {
     assert_approx(line_from_points([[1,0],[0,0],[-1,0]]),[[-1,0],[1,0]]);
     assert_approx(line_from_points([[1,1],[0,1],[-1,1]]),[[-1,1],[1,1]]);
-    assert(line_from_points([[1,1],[0,1],[-1,0]])==undef);
-    assert(line_from_points([[1,1],[0,1],[-1,0]],fast=true)== [[-1,0],[1,1]]);
+    assert(line_from_points([[1,1],[0,1],[-1,0]],check_collinear=true)==undef);
+    assert(line_from_points([[3,3],[0,3],[0,0]],check_collinear=false)==[[-0.5,0.5],[2.5,3.5]]);
 }
 *test_line_from_points();