https://github.com/asweigart/pyperclip/issues/245

--- /dev/null
+++ pyperclip-1.9.0/tox.ini
@@ -0,0 +1,13 @@
+# tox (https://tox.readthedocs.io/) is a tool for running tests
+# in multiple virtualenvs. This configuration file will run the
+# test suite on all supported python versions. To use it, "pip install tox"
+# and then run "tox" from this directory.
+
+[tox]
+envlist = py27, py35, py36, py37, py38, py39, py310
+
+[testenv]
+deps =
+
+commands =
+    python tests/test_pyperclip.py