Attempt to avoid errors in PyPY (test of hypothesis)

setuptools/tests/test_build_py.py

@@ -1,4 +1,5 @@
 import os
+import platform
 import stat
 import shutil
 import warnings
@@ -157,6 +158,11 @@ def test_executable_data(tmpdir_cwd):
 }
 
 
+@pytest.mark.skipif(
+    platform.python_implementation() == 'PyPy',
+    reason="Playing with warning filters might be causing unexpected problems in PyPy, "
+    "see discussion in pypa/setuptools#4255.",
+)
 def test_excluded_subpackages(tmpdir_cwd):
     jaraco.path.build(EXAMPLE_WITH_MANIFEST)
     dist = Distribution({"script_name": "%PEP 517%"})