diff --git a/angular.json b/angular.json
index 3db4488a1..0ac0b76b9 100644
--- a/angular.json
+++ b/angular.json
@@ -114,6 +114,7 @@
           "options": {
             "main": "src/test.ts",
             "karmaConfig": "./karma.conf.js",
+            "sourceMap": true,
             "polyfills": "src/polyfills.ts",
             "stylePreprocessorOptions": {
               "includePaths": [