fix linux tests

build/tfs/linux/build.yml

@@ -34,5 +34,5 @@ steps:
   name: build
 
 - script: |
-    ./scripts/test.sh --build --reporter dot
+    DISPLAY=:10 ./scripts/test.sh --build --reporter dot
   name: test
\ No newline at end of file

package.json

@@ -19,7 +19,7 @@
     "7z": "7z",
     "update-grammars": "node build/npm/update-all-grammars.js",
     "update-localization-extension": "node build/npm/update-localization-extension.js",
-    "smoketest": "cd test/smoke && mocha",
+      "smoketest": "cd test/smoke && mocha",
     "monaco-compile-check": "tsc -p src/tsconfig.monaco.json --noEmit"
   },
   "dependencies": {