diff --git a/screw.scad b/screw.scad
index e8598af..cd4ce2b 100644
--- a/screw.scad
+++ b/screw.scad
@@ -1,5 +1,5 @@
 // Parametric screw-like things (ball screws, augers)
-// License: GNU GPL 2.0 or later.
+// License: GNU LGPL 2.1 or later.
 // © 2010 by Elmo Mäntynen
 
 include <curves.scad>
diff --git a/servos.scad b/servos.scad
index a635a97..b751835 100644
--- a/servos.scad
+++ b/servos.scad
@@ -104,5 +104,5 @@ module alignds420(position, rotation, screws = 0, axle_lenght = 0)
 	}
 }
 
-// Example, uncomment to test
-alignds420(screws=1);
+// Tests:
+module test_alignds420(){alignds420(screws=1);}
diff --git a/test_compile.py b/test_compile.py
index a50e582..b29b82a 100644
--- a/test_compile.py
+++ b/test_compile.py
@@ -16,14 +16,14 @@ def pytest_generate_tests(metafunc):
                 metafunc.addcall(funcargs=dict(modpath=fpath))
 
 
-def test_compile(modname, modpath):
-    tempname = "test_" + modpath.basename + modname + '.scad'
+def test_module_compile(modname, modpath):
+    tempname = modpath.basename + '-' + modname + '.scad'
     fpath = temppath.join(tempname)
     stlpath = temppath.join(tempname + ".stl")
     f = fpath.open('w')
     f.write("""
 //generated testfile
-include <%s>
+use <%s>
 
 %s();
 """ % (modpath, modname))
@@ -34,9 +34,8 @@ include <%s>
     assert "warning" or "error" not in output[2].strip().lowercase()
     assert len(stlpath.readlines()) > 2
 
-def test_compile_default(modpath):
-    tempname = "test_" + modpath.basename
-    stlpath = temppath.join(tempname + ".stl")
+def test_file_compile(modpath):
+    stlpath = temppath.join(modpath.basename + "-test.stl")
     output = call_openscad(path=modpath, stlpath=stlpath)
     print output
     assert output[0] is 0
diff --git a/utilities.scad b/utilities.scad
index 4eb0643..cafb6ec 100644
--- a/utilities.scad
+++ b/utilities.scad
@@ -1,14 +1,14 @@
 /*
  * Utility functions.
- * 
+ *
  * Originally by Hans Häggström, 2010.
  * Dual licenced under Creative Commons Attribution-Share Alike 3.0 and LGPL2 or later
  */
 
 <units.scad>
 
-function distance(a, b) = sqrt( (a[0] - b[0])*(a[0] - b[0]) + 
-                                (a[1] - b[1])*(a[1] - b[1]) + 
+function distance(a, b) = sqrt( (a[0] - b[0])*(a[0] - b[0]) +
+                                (a[1] - b[1])*(a[1] - b[1]) +
                                 (a[2] - b[2])*(a[2] - b[2]) );
 
 function length2(a) = sqrt( a[0]*a[0] + a[1]*a[1] );
@@ -23,27 +23,6 @@ function angle(v) = angleOfNormalizedVector(normalized(v));
 
 function angleBetweenTwoPoints(a, b) = angle(normalized(b-a));
 
-// Untested
-module intersection(big_number=1000000000){
-    difference(){
-        child(0);
-        difference(){
-            cube(big_number, center=true);
-            child(1);
-        }
-    }
-}
-
-module intersection2(){
-    difference(){
-        child(0);
-        difference(){
-            child(0);
-            child(1);
-        }
-    }
-}
-
 
 CENTER = 0;
 LEFT = -0.5;
@@ -66,9 +45,9 @@ module fromTo(from=[0,0,0], to=[1*m,0,0], size=[1*cm, 1*cm], align=[CENTER, CENT
 
     color(material)
       translate(from)
-        rotate(angle) 
+        rotate(angle)
           translate( [ -endCaps[0]*size[0] - endExtras[0], size[0]*(-0.5-align[0]), size[1]*(-0.5+align[1]) ] )
-            rotate(rotation) 
+            rotate(rotation)
               scale([length, size[0], size[1]]) child();
   }
 }