diff --git a/tests/test_masks2d.scad b/tests/test_masks2d.scad
index 13052db..ca4ccd4 100644
--- a/tests/test_masks2d.scad
+++ b/tests/test_masks2d.scad
@@ -19,24 +19,24 @@ test_mask2d_chamfer();
 
 module test_mask2d_cove() {
     $fn = 24;
-    assert_approx(mask2d_cove(r=10),[[10,-0.01],[-0.01,-0.01],[-0.01,10],[0,10],[2.58819045103,9.65925826289],[5,8.66025403784],[7.07106781187,7.07106781187],[8.66025403784,5],[9.65925826289,2.58819045103],[10,0]]);
-    assert_approx(mask2d_cove(d=20),[[10,-0.01],[-0.01,-0.01],[-0.01,10],[0,10],[2.58819045103,9.65925826289],[5,8.66025403784],[7.07106781187,7.07106781187],[8.66025403784,5],[9.65925826289,2.58819045103],[10,0]]);
-    assert_approx(mask2d_cove(r=10,inset=1),[[11,-0.01],[-0.01,-0.01],[-0.01,11],[1,11],[3.58819045103,10.6592582629],[6,9.66025403784],[8.07106781187,8.07106781187],[9.66025403784,6],[10.6592582629,3.58819045103],[11,1]]);
-    assert_approx(mask2d_cove(d=20,inset=1),[[11,-0.01],[-0.01,-0.01],[-0.01,11],[1,11],[3.58819045103,10.6592582629],[6,9.66025403784],[8.07106781187,8.07106781187],[9.66025403784,6],[10.6592582629,3.58819045103],[11,1]]);
-    assert_approx(mask2d_cove(r=10,inset=1,excess=1),[[11,-1],[-1,-1],[-1,11],[1,11],[3.58819045103,10.6592582629],[6,9.66025403784],[8.07106781187,8.07106781187],[9.66025403784,6],[10.6592582629,3.58819045103],[11,1]]);
-    assert_approx(mask2d_cove(d=20,inset=1,excess=1),[[11,-1],[-1,-1],[-1,11],[1,11],[3.58819045103,10.6592582629],[6,9.66025403784],[8.07106781187,8.07106781187],[9.66025403784,6],[10.6592582629,3.58819045103],[11,1]]);
+    assert_approx(mask2d_cove(r=10),[[-0.01,10],[0,10],[3.09016994375,9.51056516295],[5.87785252292,8.09016994375],[8.09016994375,5.87785252292],[9.51056516295,3.09016994375],[10,0],[10,-0.01],[0,-0.01],[-0.01,-0.01],[-0.01,0]]);
+    assert_approx(mask2d_cove(d=20),[[-0.01,10],[0,10],[3.09016994375,9.51056516295],[5.87785252292,8.09016994375],[8.09016994375,5.87785252292],[9.51056516295,3.09016994375],[10,0],[10,-0.01],[0,-0.01],[-0.01,-0.01],[-0.01,0]]);
+    assert_approx(mask2d_cove(r=10,inset=1),[[-0.01,11],[1,11],[4.09016994375,10.510565163],[6.87785252292,9.09016994375],[9.09016994375,6.87785252292],[10.510565163,4.09016994375],[11,1],[11,-0.01],[0,-0.01],[-0.01,-0.01],[-0.01,0]]);
+    assert_approx(mask2d_cove(d=20,inset=1),[[-0.01,11],[1,11],[4.09016994375,10.510565163],[6.87785252292,9.09016994375],[9.09016994375,6.87785252292],[10.510565163,4.09016994375],[11,1],[11,-0.01],[0,-0.01],[-0.01,-0.01],[-0.01,0]]);
+    assert_approx(mask2d_cove(r=10,inset=1,excess=1),[[-1,11],[1,11],[4.09016994375,10.510565163],[6.87785252292,9.09016994375],[9.09016994375,6.87785252292],[10.510565163,4.09016994375],[11,1],[11,-1],[0,-1],[-1,-1],[-1,0]]);
+    assert_approx(mask2d_cove(d=20,inset=1,excess=1),[[-1,11],[1,11],[4.09016994375,10.510565163],[6.87785252292,9.09016994375],[9.09016994375,6.87785252292],[10.510565163,4.09016994375],[11,1],[11,-1],[0,-1],[-1,-1],[-1,0]]);
 }
 test_mask2d_cove();
 
 
 module test_mask2d_roundover() {
     $fn = 24;
-    assert_approx(mask2d_roundover(r=10),[[10,-0.01],[-0.01,-0.01],[-0.01,10],[0,10],[0.340741737109,7.41180954897],[1.33974596216,5],[2.92893218813,2.92893218813],[5,1.33974596216],[7.41180954897,0.340741737109],[10,0]]);
-    assert_approx(mask2d_roundover(d=20),[[10,-0.01],[-0.01,-0.01],[-0.01,10],[0,10],[0.340741737109,7.41180954897],[1.33974596216,5],[2.92893218813,2.92893218813],[5,1.33974596216],[7.41180954897,0.340741737109],[10,0]]);
-    assert_approx(mask2d_roundover(r=10,inset=1),[[11,-0.01],[-0.01,-0.01],[-0.01,11],[1,11],[1.34074173711,8.41180954897],[2.33974596216,6],[3.92893218813,3.92893218813],[6,2.33974596216],[8.41180954897,1.34074173711],[11,1]]);
-    assert_approx(mask2d_roundover(d=20,inset=1),[[11,-0.01],[-0.01,-0.01],[-0.01,11],[1,11],[1.34074173711,8.41180954897],[2.33974596216,6],[3.92893218813,3.92893218813],[6,2.33974596216],[8.41180954897,1.34074173711],[11,1]]);
-    assert_approx(mask2d_roundover(r=10,inset=1,excess=1),[[11,-1],[-1,-1],[-1,11],[1,11],[1.34074173711,8.41180954897],[2.33974596216,6],[3.92893218813,3.92893218813],[6,2.33974596216],[8.41180954897,1.34074173711],[11,1]]);
-    assert_approx(mask2d_roundover(d=20,inset=1,excess=1),[[11,-1],[-1,-1],[-1,11],[1,11],[1.34074173711,8.41180954897],[2.33974596216,6],[3.92893218813,3.92893218813],[6,2.33974596216],[8.41180954897,1.34074173711],[11,1]]);
+    assert_approx(mask2d_roundover(r=10),[[-0.01,10],[-1.7763568394e-15,10],[0.489434837048,6.90983005625],[1.90983005625,4.12214747708],[4.12214747708,1.90983005625],[6.90983005625,0.489434837048],[10,-1.7763568394e-15],[10,-0.01],[0,-0.01],[-0.01,-0.01],[-0.01,0]]);
+    assert_approx(mask2d_roundover(d=20),[[-0.01,10],[-1.7763568394e-15,10],[0.489434837048,6.90983005625],[1.90983005625,4.12214747708],[4.12214747708,1.90983005625],[6.90983005625,0.489434837048],[10,-1.7763568394e-15],[10,-0.01],[0,-0.01],[-0.01,-0.01],[-0.01,0]]);
+    assert_approx(mask2d_roundover(r=10,inset=1),[[-0.01,11],[1,11],[1.48943483705,7.90983005625],[2.90983005625,5.12214747708],[5.12214747708,2.90983005625],[7.90983005625,1.48943483705],[11,1],[11,-0.01],[0,-0.01],[-0.01,-0.01],[-0.01,0]]);
+    assert_approx(mask2d_roundover(d=20,inset=1),[[-0.01,11],[1,11],[1.48943483705,7.90983005625],[2.90983005625,5.12214747708],[5.12214747708,2.90983005625],[7.90983005625,1.48943483705],[11,1],[11,-0.01],[0,-0.01],[-0.01,-0.01],[-0.01,0]]);
+    assert_approx(mask2d_roundover(r=10,inset=1,excess=1),[[-1,11],[1,11],[1.48943483705,7.90983005625],[2.90983005625,5.12214747708],[5.12214747708,2.90983005625],[7.90983005625,1.48943483705],[11,1],[11,-1],[0,-1],[-1,-1],[-1,0]]);
+    assert_approx(mask2d_roundover(d=20,inset=1,excess=1),[[-1,11],[1,11],[1.48943483705,7.90983005625],[2.90983005625,5.12214747708],[5.12214747708,2.90983005625],[7.90983005625,1.48943483705],[11,1],[11,-1],[0,-1],[-1,-1],[-1,0]]);
 }
 test_mask2d_roundover();
 
@@ -59,20 +59,20 @@ test_mask2d_dovetail();
 
 
 module test_mask2d_rabbet() {
-    assert_approx(mask2d_rabbet(10), [[10,-0.01],[-0.01,-0.01],[-0.01,10],[10,10]]);
-    assert_approx(mask2d_rabbet(size=10), [[10,-0.01],[-0.01,-0.01],[-0.01,10],[10,10]]);
-    assert_approx(mask2d_rabbet(size=[10,15]), [[10,-0.01],[-0.01,-0.01],[-0.01,15],[10,15]]);
-    assert_approx(mask2d_rabbet(size=[10,15],excess=1), [[10,-1],[-1,-1],[-1,15],[10,15]]);
+    assert_approx(mask2d_rabbet(10), [[-0.01,10],[10,10],[10,-0.01],[0,-0.01],[-0.01,-0.01],[-0.01,0]]);
+    assert_approx(mask2d_rabbet(size=10), [[-0.01,10],[10,10],[10,-0.01],[0,-0.01],[-0.01,-0.01],[-0.01,0]]);
+    assert_approx(mask2d_rabbet(size=[10,15]), [[-0.01,15],[10,15],[10,-0.01],[0,-0.01],[-0.01,-0.01],[-0.01,0]]);
+    assert_approx(mask2d_rabbet(size=[10,15],excess=1), [[-1,15],[10,15],[10,-1],[0,-1],[-1,-1],[-1,0]]);
 }
 test_mask2d_rabbet();
 
 
 module test_mask2d_teardrop() {
     $fn=24;
-    assert_approx(mask2d_teardrop(r=10), [[5.85786437627,0],[5.85786437627,-0.01],[-0.01,-0.01],[-0.01,10],[0,10],[0.340741737109,7.41180954897],[1.33974596216,5],[2.92893218813,2.92893218813]]);
-    assert_approx(mask2d_teardrop(d=20), [[5.85786437627,0],[5.85786437627,-0.01],[-0.01,-0.01],[-0.01,10],[0,10],[0.340741737109,7.41180954897],[1.33974596216,5],[2.92893218813,2.92893218813]]);
-    assert_approx(mask2d_teardrop(r=10,angle=30), [[4.2264973081,0],[4.2264973081,-0.01],[-0.01,-0.01],[-0.01,10],[0,10],[0.340741737109,7.41180954897],[1.33974596216,5]]);
-    assert_approx(mask2d_teardrop(r=10,angle=30,excess=1), [[4.2264973081,0],[4.2264973081,-1],[-1,-1],[-1,10],[0,10],[0.340741737109,7.41180954897],[1.33974596216,5]]);
+    assert_approx(mask2d_teardrop(r=10), [[-0.01,10],[0,10],[0.761204674887,6.17316567635],[2.92893218813,2.92893218813],[5.85786437627,0],[5.85786437627,-0.01],[0,-0.01],[-0.01,-0.01],[-0.01,0]]);
+    assert_approx(mask2d_teardrop(d=20), [[-0.01,10],[0,10],[0.761204674887,6.17316567635],[2.92893218813,2.92893218813],[5.85786437627,0],[5.85786437627,-0.01],[0,-0.01],[-0.01,-0.01],[-0.01,0]]);
+    assert_approx(mask2d_teardrop(r=10,angle=30), [[-0.01,10],[0,10],[0.340741737109,7.41180954897],[1.33974596216,5],[4.2264973081,0],[4.2264973081,-0.01],[0,-0.01],[-0.01,-0.01],[-0.01,0]]);
+    assert_approx(mask2d_teardrop(r=10,angle=30,excess=1), [[-1,10],[0,10],[0.340741737109,7.41180954897],[1.33974596216,5],[4.2264973081,0],[4.2264973081,-1],[0,-1],[-1,-1],[-1,0]]);
 }
 test_mask2d_teardrop();