diff --git a/run-tests.bat b/run-tests.bat
index d6793f50..a0f8f70a 100644
--- a/run-tests.bat
+++ b/run-tests.bat
@@ -5,4 +5,4 @@ virtualenv R:\.venv
 R:\.venv\Scripts\pip install -e . --upgrade --upgrade-strategy=only-if-needed
 R:\.venv\Scripts\pipenv install --dev
 
-SET RAM_DISK="R:" && SET PYPI_VENDOR_DIR=".\tests\pypi\" && R:\.venv\Scripts\pipenv run pytest -n auto -v tests --tap-stream
+SET RAM_DISK=R: && SET PYPI_VENDOR_DIR=".\tests\pypi\" && R:\.venv\Scripts\pipenv run pytest -n auto -v tests --tap-stream