diff --git a/.azure-pipelines/templates/steps/tox-steps.yml b/.azure-pipelines/templates/steps/tox-steps.yml
index 7d43126f5..2878ecbde 100644
--- a/.azure-pipelines/templates/steps/tox-steps.yml
+++ b/.azure-pipelines/templates/steps/tox-steps.yml
@@ -22,7 +22,7 @@ steps:
     inputs:
       versionSpec: $(PYTHON_VERSION)
       addToPath: true
-    condition: ne(coalesce(variables['PYTHON_VERSION'], 'UNSPECIFIED'), 'UNSPECIFIED')
+    condition: not(variables['PYTHON_VERSION'])
   - bash: |
       python tools/pip_install.py -I tox virtualenv
     displayName: Install runtime dependencies