Workaround test issue (#13930)

* Try different version of VS code in release

* Change to make it use the actual variable

* Use a real version

Author: rchiodo

build/ci/templates/globals.yml

@@ -11,3 +11,4 @@ variables:
   npm_config_cache: $(Pipeline.Workspace)/.npm
   vmImageMacOS: 'macOS-10.15'
   TS_NODE_FILES: true # Temporarily enabled to allow using types from vscode.proposed.d.ts from ts-node (for tests).
+  VSC_PYTHON_CI_TEST_VSC_CHANNEL: '1.48.0' # Enforce this until https://github.com/microsoft/vscode-test/issues/73 is fixed

src/test/standardTest.ts

@@ -16,9 +16,7 @@ const extensionDevelopmentPath = process.env.CODE_EXTENSIONS_PATH
     ? process.env.CODE_EXTENSIONS_PATH
     : EXTENSION_ROOT_DIR_FOR_TESTS;
 
-const channel = (process.env.VSC_PYTHON_CI_TEST_VSC_CHANNEL || '').toLowerCase().includes('insiders')
-    ? 'insiders'
-    : 'stable';
+const channel = process.env.VSC_PYTHON_CI_TEST_VSC_CHANNEL || 'stable';
 
 function start() {
     console.log('*'.repeat(100));