diff --git a/tests/testPickingResults.py b/tests/testPickingResults.py
index 6331d4cd..5d863f8d 100644
--- a/tests/testPickingResults.py
+++ b/tests/testPickingResults.py
@@ -2,9 +2,20 @@ import unittest
 from pylot.core.pick.autopick import PickingResults
 
 class TestPickingResults(unittest.TestCase):
+
     def setUp(self):
         self.pr = PickingResults()
 
+    def test_non_existing_key_dot_access(self):
+        """Accessing an attribute in the class that wasnt added to the dict should give a AttributeError"""
+        with self.assertRaises(AttributeError):
+            self.pr.doesntexist
+
+    def test_non_existing_key_dict_access(self):
+        """Accessing a missing attribute in a dictionary throws a KeyError"""
+        with self.assertRaises(KeyError):
+            self.pr['keydoesnotexist']
+
     def test_dot_member_creation(self):
         self.pr.x = 0
         self.assertEqual(self.pr.x, 0)
@@ -12,21 +23,16 @@ class TestPickingResults(unittest.TestCase):
         self.assertEqual(self.pr.x, 42)
 
     def test_dot_builtin_member(self):
-        self.assertEqual(self.pr.Pflag, 0)
-        self.pr.Pflag = 99
-        self.assertEqual(self.pr.Pflag, 99)
+        self.assertEqual(self.pr.weight, 4)
+        self.pr.weight = 99
+        self.assertEqual(self.pr.weight, 99)
 
     def test_key_access(self):
         self.pr['y'] = 11
         self.assertEqual(self.pr['y'], 11)
 
     def test_builtin_fields(self):
-        self.assertEqual(self.pr.Pflag, 0)
-
-    def test_missing_attribute(self):
-        # accessing a missing attribute in a dictionary throws a KeyError
-        with self.assertRaises(KeyError):
-            self.pr['keydoesnotexist']
+        self.assertEqual(self.pr['weight'], 4)
 
     def test_in(self):
         self.assertFalse('keydoesnotexist' in self.pr)
@@ -48,6 +54,25 @@ class TestPickingResults(unittest.TestCase):
 
     def test_get_default(self):
         self.assertEqual(self.pr.get('keynotexisting', 42), 42)
-        pflag = self.pr.get('Pflag', -1)
-        self.assertEqual(pflag, 0)
-        self.assertNotEqual(pflag, -1)
\ No newline at end of file
+        weight = self.pr.get('weight', -1)
+        self.assertEqual(weight, 4)
+        self.assertNotEqual(weight, -1)
+
+    def test_dunder_attributes(self):
+        """Storing Pythons special dunder method in a dictionary is valid and should not override the instances dunder
+        methods"""
+        prev_len = len(self.pr)
+        try:
+            self.pr['__len__'] = None
+        except Exception:
+            self.fail("test_dunder_attributes failed to add a dunder attribute to the dictionary keys")
+        try:
+            curr_len = len(self.pr)
+        except Exception:
+            self.fail("test_dunder_attributes overwrote an instance internal dunder method")
+        self.assertEqual(prev_len+1, curr_len)        # +1 for the added __len__ key/value-pair
+
+        self.pr.__len__ = 42
+
+        self.assertEqual(42, self.pr['__len__'])
+        self.assertEqual(prev_len+1, curr_len, msg="__len__ was overwritten")