diff --git a/package.json b/package.json
index 9b8c0ce74..1c4fb631f 100644
--- a/package.json
+++ b/package.json
@@ -9,8 +9,8 @@
     "dev-server": "npm run templates && webpack-dev-server -d --https --port 28443",
     "test": "webpack --mode production && node bin/check-bundle-size.js && npm run jest && npm run tslint",
     "jest": "jest --maxWorkers=2",
-    "coverage": "jest --coverage",
-    "coveralls": "jest --coverage --maxWorkers=2 && cat ./coverage/lcov.info | coveralls",
+    "coverage": "jest --coverage --no-cache",
+    "coveralls": "jest --coverage --no-cache --maxWorkers=2 && cat ./coverage/lcov.info | coveralls",
     "clean": "rm -r dist/*",
     "tslint": "tslint -p .",
     "templates": "bin/build-templates.sh && bin/build-arc-templates.sh",
diff --git a/tsconfig.test.json b/tsconfig.test.json
index 499837cc4..7825d95d5 100644
--- a/tsconfig.test.json
+++ b/tsconfig.test.json
@@ -6,7 +6,8 @@
       "target": "es6",
       "lib": ["dom", "es6"],
       "jsx": "react",
-      "declaration": true
+      "declaration": true,
+      "inlineSourceMap": true
   },
   "include": [
       "./tests/**/*",