diff --git a/tests/__init__.py b/tests/__init__.py
index 7f498f7..ad8c6fd 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -39,11 +39,10 @@ def testsuite(pattern=""):
         The TestSuite object containing the matching tests.
     """
     import re
+    from importlib.resources import as_file, files
     from itertools import chain
     from os.path import dirname
 
-    from pkg_resources import resource_filename
-
     loader = unittest.defaultTestLoader
     thisdir = resource_filename(__name__, "")
     depth = __name__.count(".") + 1