noxfile, should use or instead of and

noxfile.py

@@ -89,7 +89,7 @@ def tests(session: PowerSession, coverage, pkg_specs):
     # install all requirements
     session.install_reqs(setup=True, install=True, tests=True, versions_dct=pkg_specs)
     # Since our tests are currently limited, use our own doc generation as a test
-    if sys.platform != "win32" and (version.parse(session.python) < version.parse(PY38)):
+    if sys.platform != "win32" or (version.parse(session.python) < version.parse(PY38)):
         session.install_reqs(phase="tests", phase_reqs=MKDOCS_GALLERY_EXAMPLES_REQS+MKDOCS_GALLERY_EXAMPLES_MAYAVI_REQS)
     else:
         # We are having OpenGL issues installing mayavi on Windows, skip it