diff --git a/unit-tests/polyfills/mainthread-helper.ts b/unit-tests/polyfills/mainthread-helper.ts
new file mode 100644
index 000000000..e69de29bb
diff --git a/unit-tests/runtime.ts b/unit-tests/runtime.ts
index 118271758..4835c8ca8 100644
--- a/unit-tests/runtime.ts
+++ b/unit-tests/runtime.ts
@@ -8,12 +8,13 @@ const tnsCoreModules = path.resolve(__dirname, "..", "tns-core-modules");
 moduleAlias.addPath(tnsCoreModules);
 moduleAlias.addAliases({
     // NOTE: require("tns-core-modules/platform") with these aliases will work in node but fail in Angular AoT
-    // "tns-core-modules/platform": path.resolve(__dirname, "polyfills", "platform"),
-    // "tns-core-modules/file-system/file-system-access": path.resolve(__dirname, "polyfills", "file-system-access"),
-    // "tns-core-modules/utils/utils": path.resolve(tnsCoreModules, "utils/utils-common"),
-    // "tns-core-modules/color": path.resolve(tnsCoreModules, "color/color-common"),
-    // "tns-core-modules/ui/styling/font": path.resolve(tnsCoreModules, "ui/styling/font-common"),
-    // "tns-core-modules/ui/styling/background": path.resolve(tnsCoreModules, "ui/styling/background-common"),
+    "tns-core-modules/platform": path.resolve(__dirname, "polyfills", "platform"),
+    "tns-core-modules/file-system/file-system-access": path.resolve(__dirname, "polyfills", "file-system-access"),
+    "tns-core-modules/utils/utils": path.resolve(tnsCoreModules, "utils/utils-common"),
+    "./mainthread-helper": path.resolve(__dirname, "polyfills", "mainthread-helper"),
+    "tns-core-modules/color": path.resolve(tnsCoreModules, "color/color-common"),
+    "tns-core-modules/ui/styling/font": path.resolve(tnsCoreModules, "ui/styling/font-common"),
+    "tns-core-modules/ui/styling/background": path.resolve(tnsCoreModules, "ui/styling/background-common"),
 
     "tns-core-modules": tnsCoreModules,
     "~": __dirname