The primary cause of this error is related to the way the application is handling lazy loading.Another possible cause could be a mismatch between the version of Angular being used in the application and the version being tested by Karma and Jasmine.

How do I fix: 🚀 How to Resolve This Issue Enabling Lazy Loading?

Step 1: Import the necessary modules, including the NgModule decorator from '@angular/core' and the async testing module from '@angular/core/testing'.Step 2: Use the TestBed configuration to enable lazy loading by adding the 'imports' array with the desired module.Step 3: Create a test component tha

How do I fix: Checking for Conflicting Modules?

Step 1: Verify that there are no conflicting modules between the application and the test environment.Step 2: Check if any of the modules being imported by the application conflict with the modules being tested by Karma and Jasmine.

Software⏱️ 3 min read📅 2026-06-04

How to Fix: Angular Karma Jasmine Error: Illegal state: Could not load the summary for directive

Learn how to fix: Angular Karma Jasmine Error: Illegal state: Could not load the summary for directive.

Quick Answer: Try checking your system settings or restarting.

📋 Table of Contents

⚠️ Common Causes
🚀 How to Resolve This Issue
💡 Conclusion

The Angular Karma Jasmine error 'Illegal state: Could not load the summary for directive' occurs when there is an issue with lazy loading in an Angular application.

This error affects developers who are using Angular 7 and have set up tests with Karma and Jasmine in their master branch.

⚠️ Common Causes

The primary cause of this error is related to the way the application is handling lazy loading.
Another possible cause could be a mismatch between the version of Angular being used in the application and the version being tested by Karma and Jasmine.

🚀 How to Resolve This Issue

Enabling Lazy Loading

Step 1: Import the necessary modules, including the NgModule decorator from '@angular/core' and the async testing module from '@angular/core/testing'.
Step 2: Use the TestBed configuration to enable lazy loading by adding the 'imports' array with the desired module.
Step 3: Create a test component that demonstrates lazy loading and use the async testing module to test its functionality.

Checking for Conflicting Modules

Step 1: Verify that there are no conflicting modules between the application and the test environment.
Step 2: Check if any of the modules being imported by the application conflict with the modules being tested by Karma and Jasmine.

💡 Conclusion

To resolve this error, enable lazy loading in the application configuration and verify that there are no conflicting modules. If the issue persists, check the versions of Angular being used in the application and test environment.

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