Merge pull request #337 from ral-facilities/fix-nox-test-session-on-w…

…indows-#307

Fix failing Nox tests session on Windows

noxfile.py

@@ -94,7 +94,9 @@ def tests(session):
     # Currently, only a pre-release exists for Poetry 1.2. Testing on the pre-release
     # version didn't fix the `2to3` issue when building Python ICAT, perhaps because
     # Python ICAT isn't built on the downgraded version for some reason?
-    session.run("poetry", "run", "pip", "uninstall", "-y", "setuptools")
-    session.run("poetry", "run", "pip", "install", "setuptools<58.0.0")
+    session.run("pip", "uninstall", "-y", "setuptools")
+    # Not using `poetry run` as it errors on Windows OS when a version with the '<'
+    # sign is specified for a package
+    session.run("pip", "install", "setuptools<58.0.0")
     session.run("poetry", "install", external=True)
     session.run("pytest", *args)