Skip test on PyPy 3.8 and 3.9.

Fails in the latest PyPy release, with both UserList and an ordinary list.

tests/seq_tests.py

@@ -12,13 +12,14 @@
 import pickle
 import sys
 from itertools import chain
-from typing import List
+from typing import Any, List
 
 # 3rd party
 import pytest
 from coincidence.selectors import not_pypy
 
 # this package
+from domdf_python_tools.compat import PYPY38_PLUS
 from domdf_python_tools.iterative import Len
 
 
@@ -435,7 +436,7 @@ def test_getitemoverwriteiter(self):
 		# Verify that __getitem__ overrides are not recognized by __iter__
 		class T(self.type2test):  # type: ignore
 
-			def __getitem__(self, key):
+			def __getitem__(self, key: Any) -> str:
 				return str(key) + "!!!"
 
 		assert next(iter(T((1, 2)))) == 1
@@ -486,8 +487,10 @@ def test_count(self):
 
 		assert a.count(ALWAYS_EQ), 9
 		assert self.type2test([ALWAYS_EQ, ALWAYS_EQ]).count(1) == 2
-		assert self.type2test([ALWAYS_EQ, ALWAYS_EQ]).count(NEVER_EQ) == 2
-		assert self.type2test([NEVER_EQ, NEVER_EQ]).count(ALWAYS_EQ) == 0
+
+		if not PYPY38_PLUS:  # TODO: figure out why the tests fail
+			assert self.type2test([ALWAYS_EQ, ALWAYS_EQ]).count(NEVER_EQ) == 2
+			assert self.type2test([NEVER_EQ, NEVER_EQ]).count(ALWAYS_EQ) == 0
 
 		with pytest.raises(TypeError):
 			a.count()