diff --git a/.DS_Store b/.DS_Store
deleted file mode 100644
index 1978d38..0000000
Binary files a/.DS_Store and /dev/null differ
diff --git a/src/.DS_Store b/src/.DS_Store
deleted file mode 100644
index 694e5a6..0000000
Binary files a/src/.DS_Store and /dev/null differ
diff --git a/src/oxrse_unit_conv/units.py b/src/oxrse_unit_conv/units.py
index 21a95b2..881af78 100644
--- a/src/oxrse_unit_conv/units.py
+++ b/src/oxrse_unit_conv/units.py
@@ -14,20 +14,12 @@
 
 mile = Unit(name='mile', abbr='mile', si=meter, to_si_fun=lambda n: n * 1_609.344)
 
-milimeter = Unit(name='milimeters', abbr='mm', si=meter, to_si_fun=lambda n: n / 1000)
-
 # meter_sq
 
-
 # meter_cu
 
 # kilogram
 
-# stone
-
-stone = Unit(name='stone', abbr='st', si=kilogram, to_si_fun=lambda n: n * 0.157473)
-st = stone
-
 pound = Unit(name='pound', abbr='lb', si=kilogram, to_si_fun=lambda n: n * 0.4535924)
 lb = pound
 
@@ -38,4 +30,3 @@
 # mole
 
 # candela
-sparkle = Unit(name='sparkle', abbr='sp', si=candela, to_si_fun=lambda n: n * 5)
diff --git a/src/tests/test_unit_mm.py b/src/tests/test_unit_mm.py
deleted file mode 100644
index cd6b930..0000000
--- a/src/tests/test_unit_mm.py
+++ /dev/null
@@ -1,15 +0,0 @@
-import unittest
-from oxrse_unit_conv.units import milimeter, m
-
-
-class TestMilimeter(unittest.TestCase):
-    def test_SI(self):
-        self.assertTrue(milimeter.si_unit.matches(m))
-
-    def test_basic_conversion(self):
-        self.assertEqual(milimeter.to_si(100), 0.1)
-        self.assertEqual(milimeter.to_unit(10, m), 0.01, 8)
-
-
-if __name__ == '__main__':
-    unittest.main()
diff --git a/src/tests/test_unit_sparkle.py b/src/tests/test_unit_sparkle.py
deleted file mode 100644
index 3c32c33..0000000
--- a/src/tests/test_unit_sparkle.py
+++ /dev/null
@@ -1,17 +0,0 @@
-import unittest
-from oxrse_unit_conv.units import sparkle, candela
-
-
-class TestSparkle(unittest.TestCase):
-    def test_SI(self):
-        self.assertTrue(sparkle.si_unit.matches(candela))
-
-    def test_to_si(self):
-        self.assertEqual(sparkle.to_si(1), 5)
-    
-    def test_from_si(self):
-        self.assertEqual(candela.to_unit(5, sparkle), 1)
-
-
-if __name__ == '__main__':
-    unittest.main()
diff --git a/src/tests/test_unit_st.py b/src/tests/test_unit_st.py
deleted file mode 100644
index d86cafc..0000000
--- a/src/tests/test_unit_st.py
+++ /dev/null
@@ -1,16 +0,0 @@
-import unittest
-from oxrse_unit_conv.units import kg, st
-
-class TestStone(unittest.TestCase):
-    def test_SI(self):
-        self.assertTrue(st.si_unit.matches(kg))
-    
-    def test_conversion(self):
-        self.assertEqual(st.to_si(1), 0.157473)
-        self.assertAlmostEquals(st.to_unit(10, st),10, 6)
-
-if __name__ == '_main_':
-    unittest.main()
-        
-
-