diff --git a/tests/requirements-py3.txt b/tests/requirements-py3.txt
index 7ee99292d..68b856a88 100644
--- a/tests/requirements-py3.txt
+++ b/tests/requirements-py3.txt
@@ -16,3 +16,4 @@ bpython
 brotlipy  # optional for HTTP compress downloader middleware tests
 zstandard  # optional for HTTP compress downloader middleware tests
 ipython
+pywin32; sys_platform == "win32"