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-rw-r--r--appveyor.yml2
1 files changed, 1 insertions, 1 deletions
diff --git a/appveyor.yml b/appveyor.yml
index 7a3d174d..08818069 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -26,7 +26,7 @@ cache:
test_script:
- python --version
- python -m pip install --disable-pip-version-check --upgrade pip setuptools wheel
- - pip install --upgrade tox tox-venv
+ - pip install --upgrade tox tox-venv virtualenv
- pip freeze --all
- python bootstrap.py
- tox -- --cov