diff --git a/packages/angular_devkit/build_angular/src/builders/server/tests/setup.ts b/packages/angular_devkit/build_angular/src/builders/server/tests/setup.ts
index 4621a9a7135f..8172b22e63d1 100644
--- a/packages/angular_devkit/build_angular/src/builders/server/tests/setup.ts
+++ b/packages/angular_devkit/build_angular/src/builders/server/tests/setup.ts
@@ -28,4 +28,5 @@ export const BASE_OPTIONS = Object.freeze<Schema>({
 
   // Disable optimizations
   optimization: false,
+  buildOptimizer: false,
 });