diff --git a/build/ci/templates/test_phases.yml b/build/ci/templates/test_phases.yml
index 1b4e9fd15657..96203ae7074f 100644
--- a/build/ci/templates/test_phases.yml
+++ b/build/ci/templates/test_phases.yml
@@ -145,7 +145,7 @@ steps:
         scriptPath: "./pythonFiles/install_ptvsd.py"
         arguments: "--ci"
         failOnStderr: true
-    condition: contains(variables['TestsToRun'], 'testUnitTests')
+    condition: and(eq(variables['NeedsPythonTestReqs'], 'true'), eq(variables['PythonVersion'], '3.7'))
 
   # Run the Python unit tests in our codebase. Produces a JUnit-style log file that
   # will be uploaded after all tests are complete.
diff --git a/build/ci/vscode-python-pr-validation.yaml b/build/ci/vscode-python-pr-validation.yaml
index f3cd983bf235..a33caf7c9359 100644
--- a/build/ci/vscode-python-pr-validation.yaml
+++ b/build/ci/vscode-python-pr-validation.yaml
@@ -43,6 +43,7 @@ stages:
         # SkipXvfb: [true|false] - skip initialization of xvfb prior to running system tests on Linux. False if not set
         # UploadBinary: [true|false] - upload test binaries to Azure if true. False if not set.
         'Win-Py3.7 Unit':
+          PythonVersion: '3.7'
           VMImageName: 'vs2017-win2016'
           TestsToRun: 'testUnitTests, pythonUnitTests, pythonInternalTools'
           NeedsPythonTestReqs: true