diff --git a/lib/importlib_resources/__init__.py b/lib/importlib_resources/__init__.py
index 2468f575..15f6b26b 100644
--- a/lib/importlib_resources/__init__.py
+++ b/lib/importlib_resources/__init__.py
@@ -4,7 +4,6 @@ from ._common import (
     as_file,
     files,
     Package,
-    Resource,
 )
 
 from ._legacy import (
@@ -15,6 +14,7 @@ from ._legacy import (
     read_text,
     is_resource,
     path,
+    Resource,
 )
 
 from importlib_resources.abc import ResourceReader
diff --git a/lib/importlib_resources/_adapters.py b/lib/importlib_resources/_adapters.py
index 9907b148..ea363d86 100644
--- a/lib/importlib_resources/_adapters.py
+++ b/lib/importlib_resources/_adapters.py
@@ -41,8 +41,8 @@ def _io_wrapper(file, mode='r', *args, **kwargs):
 
 class CompatibilityFiles:
     """
-    Adapter for an existing or non-existant resource reader
-    to provide a compability .files().
+    Adapter for an existing or non-existent resource reader
+    to provide a compatibility .files().
     """
 
     class SpecPath(abc.Traversable):
@@ -83,7 +83,7 @@ class CompatibilityFiles:
     class ChildPath(abc.Traversable):
         """
         Path tied to a resource reader child.
-        Can be read but doesn't expose any meaningfull children.
+        Can be read but doesn't expose any meaningful children.
         """
 
         def __init__(self, reader, name):
diff --git a/lib/importlib_resources/_common.py b/lib/importlib_resources/_common.py
index 25511672..a12e2c75 100644
--- a/lib/importlib_resources/_common.py
+++ b/lib/importlib_resources/_common.py
@@ -6,13 +6,12 @@ import contextlib
 import types
 import importlib
 
-from typing import Union, Any, Optional
+from typing import Union, Optional
 from .abc import ResourceReader, Traversable
 
 from ._compat import wrap_spec
 
 Package = Union[types.ModuleType, str]
-Resource = Union[str, os.PathLike]
 
 
 def files(package):
@@ -23,19 +22,6 @@ def files(package):
     return from_package(get_package(package))
 
 
-def normalize_path(path):
-    # type: (Any) -> str
-    """Normalize a path by ensuring it is a string.
-
-    If the resulting string contains path separators, an exception is raised.
-    """
-    str_path = str(path)
-    parent, file_name = os.path.split(str_path)
-    if parent:
-        raise ValueError(f'{path!r} must be only a file name')
-    return file_name
-
-
 def get_resource_reader(package):
     # type: (types.ModuleType) -> Optional[ResourceReader]
     """
diff --git a/lib/importlib_resources/_itertools.py b/lib/importlib_resources/_itertools.py
index dd45f2f0..cce05582 100644
--- a/lib/importlib_resources/_itertools.py
+++ b/lib/importlib_resources/_itertools.py
@@ -1,11 +1,27 @@
 from itertools import filterfalse
 
+from typing import (
+    Callable,
+    Iterable,
+    Iterator,
+    Optional,
+    Set,
+    TypeVar,
+    Union,
+)
 
-def unique_everseen(iterable, key=None):
+# Type and type variable definitions
+_T = TypeVar('_T')
+_U = TypeVar('_U')
+
+
+def unique_everseen(
+    iterable: Iterable[_T], key: Optional[Callable[[_T], _U]] = None
+) -> Iterator[_T]:
     "List unique elements, preserving order. Remember all elements ever seen."
     # unique_everseen('AAAABBBCCDAABBB') --> A B C D
     # unique_everseen('ABBCcAD', str.lower) --> A B C D
-    seen = set()
+    seen: Set[Union[_T, _U]] = set()
     seen_add = seen.add
     if key is None:
         for element in filterfalse(seen.__contains__, iterable):
diff --git a/lib/importlib_resources/_legacy.py b/lib/importlib_resources/_legacy.py
index 2ddec5f9..1d5d3f1f 100644
--- a/lib/importlib_resources/_legacy.py
+++ b/lib/importlib_resources/_legacy.py
@@ -1,25 +1,58 @@
+import functools
 import os
 import pathlib
 import types
+import warnings
 
-from typing import Union, Iterable, ContextManager, BinaryIO, TextIO
+from typing import Union, Iterable, ContextManager, BinaryIO, TextIO, Any
 
 from . import _common
 
 Package = Union[types.ModuleType, str]
-Resource = Union[str, os.PathLike]
+Resource = str
 
 
+def deprecated(func):
+    @functools.wraps(func)
+    def wrapper(*args, **kwargs):
+        warnings.warn(
+            f"{func.__name__} is deprecated. Use files() instead. "
+            "Refer to https://importlib-resources.readthedocs.io"
+            "/en/latest/using.html#migrating-from-legacy for migration advice.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        return func(*args, **kwargs)
+
+    return wrapper
+
+
+def normalize_path(path):
+    # type: (Any) -> str
+    """Normalize a path by ensuring it is a string.
+
+    If the resulting string contains path separators, an exception is raised.
+    """
+    str_path = str(path)
+    parent, file_name = os.path.split(str_path)
+    if parent:
+        raise ValueError(f'{path!r} must be only a file name')
+    return file_name
+
+
+@deprecated
 def open_binary(package: Package, resource: Resource) -> BinaryIO:
     """Return a file-like object opened for binary reading of the resource."""
-    return (_common.files(package) / _common.normalize_path(resource)).open('rb')
+    return (_common.files(package) / normalize_path(resource)).open('rb')
 
 
+@deprecated
 def read_binary(package: Package, resource: Resource) -> bytes:
     """Return the binary contents of the resource."""
-    return (_common.files(package) / _common.normalize_path(resource)).read_bytes()
+    return (_common.files(package) / normalize_path(resource)).read_bytes()
 
 
+@deprecated
 def open_text(
     package: Package,
     resource: Resource,
@@ -27,11 +60,12 @@ def open_text(
     errors: str = 'strict',
 ) -> TextIO:
     """Return a file-like object opened for text reading of the resource."""
-    return (_common.files(package) / _common.normalize_path(resource)).open(
+    return (_common.files(package) / normalize_path(resource)).open(
         'r', encoding=encoding, errors=errors
     )
 
 
+@deprecated
 def read_text(
     package: Package,
     resource: Resource,
@@ -47,6 +81,7 @@ def read_text(
         return fp.read()
 
 
+@deprecated
 def contents(package: Package) -> Iterable[str]:
     """Return an iterable of entries in `package`.
 
@@ -57,18 +92,20 @@ def contents(package: Package) -> Iterable[str]:
     return [path.name for path in _common.files(package).iterdir()]
 
 
+@deprecated
 def is_resource(package: Package, name: str) -> bool:
     """True if `name` is a resource inside `package`.
 
     Directories are *not* resources.
     """
-    resource = _common.normalize_path(name)
+    resource = normalize_path(name)
     return any(
         traversable.name == resource and traversable.is_file()
         for traversable in _common.files(package).iterdir()
     )
 
 
+@deprecated
 def path(
     package: Package,
     resource: Resource,
@@ -81,4 +118,4 @@ def path(
     raised if the file was deleted prior to the context manager
     exiting).
     """
-    return _common.as_file(_common.files(package) / _common.normalize_path(resource))
+    return _common.as_file(_common.files(package) / normalize_path(resource))
diff --git a/lib/importlib_resources/abc.py b/lib/importlib_resources/abc.py
index 56dc8127..d39dc1ad 100644
--- a/lib/importlib_resources/abc.py
+++ b/lib/importlib_resources/abc.py
@@ -76,7 +76,7 @@ class Traversable(Protocol):
     @abc.abstractmethod
     def is_dir(self) -> bool:
         """
-        Return True if self is a dir
+        Return True if self is a directory
         """
 
     @abc.abstractmethod
diff --git a/lib/importlib_resources/tests/test_contents.py b/lib/importlib_resources/tests/test_contents.py
index 2af70607..525568e8 100644
--- a/lib/importlib_resources/tests/test_contents.py
+++ b/lib/importlib_resources/tests/test_contents.py
@@ -15,7 +15,8 @@ class ContentsTests:
     }
 
     def test_contents(self):
-        assert self.expected <= set(resources.contents(self.data))
+        contents = {path.name for path in resources.files(self.data).iterdir()}
+        assert self.expected <= contents
 
 
 class ContentsDiskTests(ContentsTests, unittest.TestCase):
diff --git a/lib/importlib_resources/tests/test_open.py b/lib/importlib_resources/tests/test_open.py
index 919fc0db..87b42c3d 100644
--- a/lib/importlib_resources/tests/test_open.py
+++ b/lib/importlib_resources/tests/test_open.py
@@ -7,37 +7,43 @@ from . import util
 
 class CommonBinaryTests(util.CommonTests, unittest.TestCase):
     def execute(self, package, path):
-        with resources.open_binary(package, path):
+        target = resources.files(package).joinpath(path)
+        with target.open('rb'):
             pass
 
 
 class CommonTextTests(util.CommonTests, unittest.TestCase):
     def execute(self, package, path):
-        with resources.open_text(package, path):
+        target = resources.files(package).joinpath(path)
+        with target.open():
             pass
 
 
 class OpenTests:
     def test_open_binary(self):
-        with resources.open_binary(self.data, 'utf-8.file') as fp:
+        target = resources.files(self.data) / 'binary.file'
+        with target.open('rb') as fp:
             result = fp.read()
-            self.assertEqual(result, b'Hello, UTF-8 world!\n')
+            self.assertEqual(result, b'\x00\x01\x02\x03')
 
     def test_open_text_default_encoding(self):
-        with resources.open_text(self.data, 'utf-8.file') as fp:
+        target = resources.files(self.data) / 'utf-8.file'
+        with target.open() as fp:
             result = fp.read()
             self.assertEqual(result, 'Hello, UTF-8 world!\n')
 
     def test_open_text_given_encoding(self):
-        with resources.open_text(self.data, 'utf-16.file', 'utf-16', 'strict') as fp:
+        target = resources.files(self.data) / 'utf-16.file'
+        with target.open(encoding='utf-16', errors='strict') as fp:
             result = fp.read()
         self.assertEqual(result, 'Hello, UTF-16 world!\n')
 
     def test_open_text_with_errors(self):
         # Raises UnicodeError without the 'errors' argument.
-        with resources.open_text(self.data, 'utf-16.file', 'utf-8', 'strict') as fp:
+        target = resources.files(self.data) / 'utf-16.file'
+        with target.open(encoding='utf-8', errors='strict') as fp:
             self.assertRaises(UnicodeError, fp.read)
-        with resources.open_text(self.data, 'utf-16.file', 'utf-8', 'ignore') as fp:
+        with target.open(encoding='utf-8', errors='ignore') as fp:
             result = fp.read()
         self.assertEqual(
             result,
@@ -47,14 +53,12 @@ class OpenTests:
         )
 
     def test_open_binary_FileNotFoundError(self):
-        self.assertRaises(
-            FileNotFoundError, resources.open_binary, self.data, 'does-not-exist'
-        )
+        target = resources.files(self.data) / 'does-not-exist'
+        self.assertRaises(FileNotFoundError, target.open, 'rb')
 
     def test_open_text_FileNotFoundError(self):
-        self.assertRaises(
-            FileNotFoundError, resources.open_text, self.data, 'does-not-exist'
-        )
+        target = resources.files(self.data) / 'does-not-exist'
+        self.assertRaises(FileNotFoundError, target.open)
 
 
 class OpenDiskTests(OpenTests, unittest.TestCase):
diff --git a/lib/importlib_resources/tests/test_path.py b/lib/importlib_resources/tests/test_path.py
index 9180626f..4f4d3943 100644
--- a/lib/importlib_resources/tests/test_path.py
+++ b/lib/importlib_resources/tests/test_path.py
@@ -8,7 +8,7 @@ from . import util
 
 class CommonTests(util.CommonTests, unittest.TestCase):
     def execute(self, package, path):
-        with resources.path(package, path):
+        with resources.as_file(resources.files(package).joinpath(path)):
             pass
 
 
@@ -17,7 +17,8 @@ class PathTests:
         # Path should be readable.
         # Test also implicitly verifies the returned object is a pathlib.Path
         # instance.
-        with resources.path(self.data, 'utf-8.file') as path:
+        target = resources.files(self.data) / 'utf-8.file'
+        with resources.as_file(target) as path:
             self.assertTrue(path.name.endswith("utf-8.file"), repr(path))
             # pathlib.Path.read_text() was introduced in Python 3.5.
             with path.open('r', encoding='utf-8') as file:
@@ -34,7 +35,8 @@ class PathDiskTests(PathTests, unittest.TestCase):
         file-system-backed resources do not get the tempdir
         treatment.
         """
-        with resources.path(self.data, 'utf-8.file') as path:
+        target = resources.files(self.data) / 'utf-8.file'
+        with resources.as_file(target) as path:
             assert 'data' in str(path)
 
 
@@ -53,7 +55,8 @@ class PathZipTests(PathTests, util.ZipSetup, unittest.TestCase):
     def test_remove_in_context_manager(self):
         # It is not an error if the file that was temporarily stashed on the
         # file system is removed inside the `with` stanza.
-        with resources.path(self.data, 'utf-8.file') as path:
+        target = resources.files(self.data) / 'utf-8.file'
+        with resources.as_file(target) as path:
             path.unlink()
 
 
diff --git a/lib/importlib_resources/tests/test_read.py b/lib/importlib_resources/tests/test_read.py
index 2616fbf5..41dd6db5 100644
--- a/lib/importlib_resources/tests/test_read.py
+++ b/lib/importlib_resources/tests/test_read.py
@@ -8,31 +8,36 @@ from importlib import import_module
 
 class CommonBinaryTests(util.CommonTests, unittest.TestCase):
     def execute(self, package, path):
-        resources.read_binary(package, path)
+        resources.files(package).joinpath(path).read_bytes()
 
 
 class CommonTextTests(util.CommonTests, unittest.TestCase):
     def execute(self, package, path):
-        resources.read_text(package, path)
+        resources.files(package).joinpath(path).read_text()
 
 
 class ReadTests:
-    def test_read_binary(self):
-        result = resources.read_binary(self.data, 'binary.file')
+    def test_read_bytes(self):
+        result = resources.files(self.data).joinpath('binary.file').read_bytes()
         self.assertEqual(result, b'\0\1\2\3')
 
     def test_read_text_default_encoding(self):
-        result = resources.read_text(self.data, 'utf-8.file')
+        result = resources.files(self.data).joinpath('utf-8.file').read_text()
         self.assertEqual(result, 'Hello, UTF-8 world!\n')
 
     def test_read_text_given_encoding(self):
-        result = resources.read_text(self.data, 'utf-16.file', encoding='utf-16')
+        result = (
+            resources.files(self.data)
+            .joinpath('utf-16.file')
+            .read_text(encoding='utf-16')
+        )
         self.assertEqual(result, 'Hello, UTF-16 world!\n')
 
     def test_read_text_with_errors(self):
         # Raises UnicodeError without the 'errors' argument.
-        self.assertRaises(UnicodeError, resources.read_text, self.data, 'utf-16.file')
-        result = resources.read_text(self.data, 'utf-16.file', errors='ignore')
+        target = resources.files(self.data) / 'utf-16.file'
+        self.assertRaises(UnicodeError, target.read_text, encoding='utf-8')
+        result = target.read_text(encoding='utf-8', errors='ignore')
         self.assertEqual(
             result,
             'H\x00e\x00l\x00l\x00o\x00,\x00 '
@@ -48,11 +53,15 @@ class ReadDiskTests(ReadTests, unittest.TestCase):
 class ReadZipTests(ReadTests, util.ZipSetup, unittest.TestCase):
     def test_read_submodule_resource(self):
         submodule = import_module('ziptestdata.subdirectory')
-        result = resources.read_binary(submodule, 'binary.file')
+        result = resources.files(submodule).joinpath('binary.file').read_bytes()
         self.assertEqual(result, b'\0\1\2\3')
 
     def test_read_submodule_resource_by_name(self):
-        result = resources.read_binary('ziptestdata.subdirectory', 'binary.file')
+        result = (
+            resources.files('ziptestdata.subdirectory')
+            .joinpath('binary.file')
+            .read_bytes()
+        )
         self.assertEqual(result, b'\0\1\2\3')
 
 
diff --git a/lib/importlib_resources/tests/test_resource.py b/lib/importlib_resources/tests/test_resource.py
index 071cb8d4..5affd8b0 100644
--- a/lib/importlib_resources/tests/test_resource.py
+++ b/lib/importlib_resources/tests/test_resource.py
@@ -14,34 +14,18 @@ from ._compat import import_helper, unlink
 class ResourceTests:
     # Subclasses are expected to set the `data` attribute.
 
-    def test_is_resource_good_path(self):
-        self.assertTrue(resources.is_resource(self.data, 'binary.file'))
+    def test_is_file_exists(self):
+        target = resources.files(self.data) / 'binary.file'
+        self.assertTrue(target.is_file())
 
-    def test_is_resource_missing(self):
-        self.assertFalse(resources.is_resource(self.data, 'not-a-file'))
+    def test_is_file_missing(self):
+        target = resources.files(self.data) / 'not-a-file'
+        self.assertFalse(target.is_file())
 
-    def test_is_resource_subresource_directory(self):
-        # Directories are not resources.
-        self.assertFalse(resources.is_resource(self.data, 'subdirectory'))
-
-    def test_contents(self):
-        contents = set(resources.contents(self.data))
-        # There may be cruft in the directory listing of the data directory.
-        # It could have a __pycache__ directory,
-        # an artifact of the
-        # test suite importing these modules, which
-        # are not germane to this test, so just filter them out.
-        contents.discard('__pycache__')
-        self.assertEqual(
-            sorted(contents),
-            [
-                '__init__.py',
-                'binary.file',
-                'subdirectory',
-                'utf-16.file',
-                'utf-8.file',
-            ],
-        )
+    def test_is_dir(self):
+        target = resources.files(self.data) / 'subdirectory'
+        self.assertFalse(target.is_file())
+        self.assertTrue(target.is_dir())
 
 
 class ResourceDiskTests(ResourceTests, unittest.TestCase):
@@ -53,30 +37,34 @@ class ResourceZipTests(ResourceTests, util.ZipSetup, unittest.TestCase):
     pass
 
 
+def names(traversable):
+    return {item.name for item in traversable.iterdir()}
+
+
 class ResourceLoaderTests(unittest.TestCase):
     def test_resource_contents(self):
         package = util.create_package(
             file=data01, path=data01.__file__, contents=['A', 'B', 'C']
         )
-        self.assertEqual(set(resources.contents(package)), {'A', 'B', 'C'})
+        self.assertEqual(names(resources.files(package)), {'A', 'B', 'C'})
 
-    def test_resource_is_resource(self):
+    def test_is_file(self):
         package = util.create_package(
             file=data01, path=data01.__file__, contents=['A', 'B', 'C', 'D/E', 'D/F']
         )
-        self.assertTrue(resources.is_resource(package, 'B'))
+        self.assertTrue(resources.files(package).joinpath('B').is_file())
 
-    def test_resource_directory_is_not_resource(self):
+    def test_is_dir(self):
         package = util.create_package(
             file=data01, path=data01.__file__, contents=['A', 'B', 'C', 'D/E', 'D/F']
         )
-        self.assertFalse(resources.is_resource(package, 'D'))
+        self.assertTrue(resources.files(package).joinpath('D').is_dir())
 
-    def test_resource_missing_is_not_resource(self):
+    def test_resource_missing(self):
         package = util.create_package(
             file=data01, path=data01.__file__, contents=['A', 'B', 'C', 'D/E', 'D/F']
         )
-        self.assertFalse(resources.is_resource(package, 'Z'))
+        self.assertFalse(resources.files(package).joinpath('Z').is_file())
 
 
 class ResourceCornerCaseTests(unittest.TestCase):
@@ -94,7 +82,7 @@ class ResourceCornerCaseTests(unittest.TestCase):
         module.__file__ = '/path/which/shall/not/be/named'
         module.__spec__.loader = module.__loader__
         module.__spec__.origin = module.__file__
-        self.assertFalse(resources.is_resource(module, 'A'))
+        self.assertFalse(resources.files(module).joinpath('A').is_file())
 
 
 class ResourceFromZipsTest01(util.ZipSetupBase, unittest.TestCase):
@@ -102,22 +90,24 @@ class ResourceFromZipsTest01(util.ZipSetupBase, unittest.TestCase):
 
     def test_is_submodule_resource(self):
         submodule = import_module('ziptestdata.subdirectory')
-        self.assertTrue(resources.is_resource(submodule, 'binary.file'))
+        self.assertTrue(resources.files(submodule).joinpath('binary.file').is_file())
 
     def test_read_submodule_resource_by_name(self):
         self.assertTrue(
-            resources.is_resource('ziptestdata.subdirectory', 'binary.file')
+            resources.files('ziptestdata.subdirectory')
+            .joinpath('binary.file')
+            .is_file()
         )
 
     def test_submodule_contents(self):
         submodule = import_module('ziptestdata.subdirectory')
         self.assertEqual(
-            set(resources.contents(submodule)), {'__init__.py', 'binary.file'}
+            names(resources.files(submodule)), {'__init__.py', 'binary.file'}
         )
 
     def test_submodule_contents_by_name(self):
         self.assertEqual(
-            set(resources.contents('ziptestdata.subdirectory')),
+            names(resources.files('ziptestdata.subdirectory')),
             {'__init__.py', 'binary.file'},
         )
 
@@ -131,10 +121,12 @@ class ResourceFromZipsTest02(util.ZipSetupBase, unittest.TestCase):
         distinct resources. Ref python/importlib_resources#44.
         """
         self.assertEqual(
-            set(resources.contents('ziptestdata.one')), {'__init__.py', 'resource1.txt'}
+            names(resources.files('ziptestdata.one')),
+            {'__init__.py', 'resource1.txt'},
         )
         self.assertEqual(
-            set(resources.contents('ziptestdata.two')), {'__init__.py', 'resource2.txt'}
+            names(resources.files('ziptestdata.two')),
+            {'__init__.py', 'resource2.txt'},
         )
 
 
@@ -175,41 +167,43 @@ class DeletingZipsTest(unittest.TestCase):
             # If the test fails, this will probably fail too
             pass
 
-    def test_contents_does_not_keep_open(self):
-        c = resources.contents('ziptestdata')
+    def test_iterdir_does_not_keep_open(self):
+        c = [item.name for item in resources.files('ziptestdata').iterdir()]
         self.zip_path.unlink()
         del c
 
-    def test_is_resource_does_not_keep_open(self):
-        c = resources.is_resource('ziptestdata', 'binary.file')
+    def test_is_file_does_not_keep_open(self):
+        c = resources.files('ziptestdata').joinpath('binary.file').is_file()
         self.zip_path.unlink()
         del c
 
-    def test_is_resource_failure_does_not_keep_open(self):
-        c = resources.is_resource('ziptestdata', 'not-present')
+    def test_is_file_failure_does_not_keep_open(self):
+        c = resources.files('ziptestdata').joinpath('not-present').is_file()
         self.zip_path.unlink()
         del c
 
     @unittest.skip("Desired but not supported.")
-    def test_path_does_not_keep_open(self):
-        c = resources.path('ziptestdata', 'binary.file')
+    def test_as_file_does_not_keep_open(self):  # pragma: no cover
+        c = resources.as_file(resources.files('ziptestdata') / 'binary.file')
         self.zip_path.unlink()
         del c
 
     def test_entered_path_does_not_keep_open(self):
         # This is what certifi does on import to make its bundle
         # available for the process duration.
-        c = resources.path('ziptestdata', 'binary.file').__enter__()
+        c = resources.as_file(
+            resources.files('ziptestdata') / 'binary.file'
+        ).__enter__()
         self.zip_path.unlink()
         del c
 
     def test_read_binary_does_not_keep_open(self):
-        c = resources.read_binary('ziptestdata', 'binary.file')
+        c = resources.files('ziptestdata').joinpath('binary.file').read_bytes()
         self.zip_path.unlink()
         del c
 
     def test_read_text_does_not_keep_open(self):
-        c = resources.read_text('ziptestdata', 'utf-8.file', encoding='utf-8')
+        c = resources.files('ziptestdata').joinpath('utf-8.file').read_text()
         self.zip_path.unlink()
         del c
 
@@ -227,14 +221,18 @@ class ResourceFromNamespaceTest01(unittest.TestCase):
 
     def test_is_submodule_resource(self):
         self.assertTrue(
-            resources.is_resource(import_module('namespacedata01'), 'binary.file')
+            resources.files(import_module('namespacedata01'))
+            .joinpath('binary.file')
+            .is_file()
         )
 
     def test_read_submodule_resource_by_name(self):
-        self.assertTrue(resources.is_resource('namespacedata01', 'binary.file'))
+        self.assertTrue(
+            resources.files('namespacedata01').joinpath('binary.file').is_file()
+        )
 
     def test_submodule_contents(self):
-        contents = set(resources.contents(import_module('namespacedata01')))
+        contents = names(resources.files(import_module('namespacedata01')))
         try:
             contents.remove('__pycache__')
         except KeyError:
@@ -242,7 +240,7 @@ class ResourceFromNamespaceTest01(unittest.TestCase):
         self.assertEqual(contents, {'binary.file', 'utf-8.file', 'utf-16.file'})
 
     def test_submodule_contents_by_name(self):
-        contents = set(resources.contents('namespacedata01'))
+        contents = names(resources.files('namespacedata01'))
         try:
             contents.remove('__pycache__')
         except KeyError:
diff --git a/lib/importlib_resources/tests/util.py b/lib/importlib_resources/tests/util.py
index 6ac4332e..c6d83e4b 100644
--- a/lib/importlib_resources/tests/util.py
+++ b/lib/importlib_resources/tests/util.py
@@ -97,18 +97,6 @@ class CommonTests(metaclass=abc.ABCMeta):
         path = PurePath('utf-8.file')
         self.execute(data01, path)
 
-    def test_absolute_path(self):
-        # An absolute path is a ValueError.
-        path = Path(__file__)
-        full_path = path.parent / 'utf-8.file'
-        with self.assertRaises(ValueError):
-            self.execute(data01, full_path)
-
-    def test_relative_path(self):
-        # A reative path is a ValueError.
-        with self.assertRaises(ValueError):
-            self.execute(data01, '../data01/utf-8.file')
-
     def test_importing_module_as_side_effect(self):
         # The anchor package can already be imported.
         del sys.modules[data01.__name__]