diff --git a/mono/Contours/Test.cs b/mono/Contours/Test.cs
index 2c1009d..3fe7efc 100644
--- a/mono/Contours/Test.cs
+++ b/mono/Contours/Test.cs
@@ -71,9 +71,9 @@ namespace Contours {
             List<List<List<Point>>> a = null;
             List<List<List<Point>>> b = null;
 
-            if (input.ContainsKey("dirtyA")) a = input["dirtyA"]; else
+            if (input.ContainsKey("badA")) a = input["badA"]; else
                 if (input.ContainsKey("a")) a = input["a"];
-            if (input.ContainsKey("dirtyB")) b = input["dirtyB"]; else
+            if (input.ContainsKey("badB")) b = input["badB"]; else
                 if (input.ContainsKey("b")) b = input["b"];
             
             if (a != null)
diff --git a/mono/Contours/tests.txt b/mono/Contours/tests.txt
index 64dd70c..f160850 100644
--- a/mono/Contours/tests.txt
+++ b/mono/Contours/tests.txt
@@ -32,6 +32,7 @@
 		( (((0, 0), (200, 0), (200, 100), (100, 100), (100, 200), (0, 200))),
 	  	  (((200, 200), (200, 100), (300, 100), (300, 300), (100, 300), (100, 200))) )
 }
+
 {
 	name:
 		(Self touch)
@@ -56,3 +57,24 @@
 		  ( ( (100, 100), (200, 100), (200, 0), (400, 0), (400, 300), (200, 300), (200, 200), (100, 200), (100, 300), (0, 300), (0, 200) ),
 		    ( (250, 100), (250, 200), (350, 200), (350, 100) ) ) )
 }
+
+{
+	name:
+		(Bad contours - cross)
+	badA:
+		((( (0, 0), (0, 100), (200, 0), (200, 100) )))
+	a:
+		( (( (0, 0), (100, 50), (0, 100) )),
+		  (( (200, 0), (200, 100), (100, 50) )) )
+}
+
+{
+	name:
+		(Bad contours - hole)
+	badA:
+		( (( (0, 0), (300, 0), (300, 300), (0, 300) )),
+		  (( (100, 100), (200, 100), (200, 200), (100, 200) )) )
+	a:
+		(( ( (0, 0), (300, 0), (300, 300), (0, 300) ),
+		   ( (100, 100), (100, 200), (200, 200), (200, 100) ) ))
+}