diff --git a/comtypes/test/test_propputref.py b/comtypes/test/test_propputref.py
deleted file mode 100644
index 8f6c7537..00000000
--- a/comtypes/test/test_propputref.py
+++ /dev/null
@@ -1,40 +0,0 @@
-# There are also propputref tests in test_sapi.py!
-import unittest
-from comtypes.client import CreateObject
-from comtypes.automation import VARIANT
-
-
-class Test(unittest.TestCase):
-    @unittest.skip(
-        "Fails on creating `TestComServerLib.TestComServer`.  Figure out why."
-    )
-    def test(self, dynamic=False):
-        d = CreateObject("Scripting.Dictionary", dynamic=dynamic)
-        s = CreateObject("TestComServerLib.TestComServer", dynamic=dynamic)
-        s.name = "the value"
-
-        # This calls propputref, since we assign an Object
-        d.Item["object"] = s
-        # This calls propput, since we assing a Value
-        d.Item["value"] = s.name
-
-        self.assertEqual(d.Item["object"], s)
-        self.assertEqual(d.Item["object"].name, "the value")
-        self.assertEqual(d.Item["value"], "the value")
-
-        # Changing the default property of the object
-        s.name = "foo bar"
-        self.assertEqual(d.Item["object"], s)
-        self.assertEqual(d.Item["object"].name, "foo bar")
-        self.assertEqual(d.Item["value"], "the value")
-
-        # This also calls propputref since we assign an Object
-        d.Item["var"] = VARIANT(s)
-        self.assertEqual(d.Item["var"], s)
-
-    def test_dispatch(self):
-        return self.test(dynamic=True)
-
-
-if __name__ == "__main__":
-    unittest.main()
diff --git a/comtypes/test/test_safearray.py b/comtypes/test/test_safearray.py
index 3c9bd18e..49238020 100644
--- a/comtypes/test/test_safearray.py
+++ b/comtypes/test/test_safearray.py
@@ -221,29 +221,6 @@ def test_VT_UNKNOWN_multi(self):
         del sa
         self.assertEqual((a, b), (com_refcnt(plib), com_refcnt(punk)))
 
-    @unittest.skip(
-        "This fails with a 'library not registered' error.  Need to figure out how to "
-        "register TestComServerLib (without admin if possible)."
-    )
-    def test_UDT(self):
-        from comtypes.gen.TestComServerLib import MYCOLOR
-
-        t = _midlSAFEARRAY(MYCOLOR)
-        self.assertTrue(t is _midlSAFEARRAY(MYCOLOR))
-
-        sa = t.from_param([MYCOLOR(0, 0, 0), MYCOLOR(1, 2, 3)])
-
-        self.assertEqual(
-            [(x.red, x.green, x.blue) for x in sa[0]],
-            [(0.0, 0.0, 0.0), (1.0, 2.0, 3.0)],
-        )
-
-        def doit():
-            t.from_param([MYCOLOR(0, 0, 0), MYCOLOR(1, 2, 3)])
-
-        bytes = find_memleak(doit)
-        self.assertFalse(bytes, "Leaks %d bytes" % bytes)
-
 
 if __name__ == "__main__":
     unittest.main()
diff --git a/comtypes/test/test_variant.py b/comtypes/test/test_variant.py
index f4d2a992..88db242e 100644
--- a/comtypes/test/test_variant.py
+++ b/comtypes/test/test_variant.py
@@ -194,23 +194,6 @@ def test_empty_BSTR(self):
         v.value = ""
         self.assertEqual(v.vt, VT_BSTR)
 
-    @unittest.skip(
-        "Fails on creating `TestComServerLib.TestComServer`.  Library not registered."
-    )
-    def test_UDT(self):
-        from comtypes.gen.TestComServerLib import MYCOLOR
-
-        v = VARIANT(MYCOLOR(red=1.0, green=2.0, blue=3.0))
-        value = v.value
-        self.assertEqual((1.0, 2.0, 3.0), (value.red, value.green, value.blue))
-
-        def func():
-            v = VARIANT(MYCOLOR(red=1.0, green=2.0, blue=3.0))
-            return v.value
-
-        bytes = find_memleak(func)
-        self.assertFalse(bytes, "Leaks %d bytes" % bytes)
-
     def test_ctypes_in_variant(self):
         v = VARIANT()
         objs = [