All your missed questions are saved
automatically for extra practice.
– / –
It's a practice test that's automatically made up of all your missed questions. Once you finish this test, you’ll be able to revisit your Challenge Bank™ to practice and sharpen your skills.
View All PlansAdding difficult questions to Challenge Bank™ is an exclusive Premium feature. Unlock access to 650+ exam-like questions, a Pass Guarantee, personalized study plans, and more.
View All PlansAdvertisement
ON Class B Commercial Licence Marathon
- Based on 2026 ON commercial driver's licence manual
- Updated for February 2026
- Perfect for first-time and renewal commercial applicants, and those adding endorsements
- Triple-checked for accuracy
Embark on the ultimate challenge with our Class B Marathon practice test, specifically designed for Canadian commercial drivers. This comprehensive Marathon test includes every question from our Class B section, totaling over 550 questions. It’s the perfect tool for those who have mastered our regular practice tests and are ready for a more rigorous examination.
The unique feature of the Marathon is its relentless focus on your improvement: any question you answer incorrectly will reappear throughout the test until you get it right. This means the Marathon only concludes when you’ve correctly answered 100% of the questions, ensuring a thorough understanding of the material.
Ideal for final preparations, this Marathon mimics the intensity and scope of the actual Class B exam, reinforcing your knowledge until perfection is achieved. Dive into this marathon session and drive towards success with unwavering confidence!
- Based on 2026 ON commercial driver's licence manual
- Perfect for first-time and renewal commercial applicants, and those adding endorsements
This test is a Premium member exclusive. You'll get
Reviewed for legal and handbook accuracy
M.S. (MIT), Chief Educational Researcher (ACES member)
Test design and learning experience oversight
Co-founder & CEO, 15+ years in driver education
Questions are created and maintained by the Tests.ca content team following our multi-layer editorial process and updated whenever the Ontario government changes its handbook or website information.
Are you in another province?
- Alberta: Test 1 / Test 2
- British Columbia: Test 1 / Test 2
- Manitoba: Test 1 / Test 2
- New Brunswick: Test 1 / Test 2
- Newfoundland and Labrador: Test 1 / Test 2
- Northwest Territories: Test 1 / Test 2
- Nova Scotia: Test 1 / Test 2
- Nunavut: Test 1 / Test 2
- Prince Edward Island: Test 1 / Test 2
- Quebec: Test 1 / Test 2
- Saskatchewan: Test 1 / Test 2
- Yukon: Test 1 / Test 2
Our commitment to accuracy and quality in our practice tests
Explore our rigorous, multi-tiered verification process that ensures each question mirrors the official manual for unparalleled accuracy.
Written by Andrei Zakhareuski Updated over a week ago
At Tests.ca, we understand the importance of reliable and accurate practice tests to help you prepare for your driver's knowledge exam. That's why we've developed a meticulous process to create and continually update our practice questions, ensuring they reflect the most current driving laws and regulations.
Here's an inside look at how we maintain the highest quality in our practice tests.
Content Creation and Verification Process
- Alignment with Official Driving Handbooks:
Every question we develop is based on the most recent version of each province's official driving manual. Our team regularly monitors each province's official website for the latest updates to ensure our practice tests are always aligned with the most current information. - Community Feedback Integration:
We leverage feedback from our vast community of users to understand which topics are most frequently tested. This helps us focus on the areas that are most relevant and beneficial for your preparation. - Expert Content Creation:
Our in-house editor, Steven, who has extensive experience in driver education, crafts each question with precision. He conducts a thorough review of each question against the official manuals to ensure accuracy. - Rigorous Review Process:
Once Steven has finalized a set of questions, our team conducts a joint review session. This second level of scrutiny involves content accuracy, proofreading, and fact-checking to eliminate any errors. - User Feedback Mechanism:
After a question goes live on our site, we keep the lines of communication open. Each question features a feedback button, inviting users to report any issues or errors. This continuous feedback loop allows us to address and rectify any concerns promptly. - Responsive Updates:
In line with our commitment to accuracy, we quickly update our practice questions to reflect any changes in the provincial government manuals. Additionally, we update the free electronic copy of the province's driver's license manuals on our site, typically within a few days after the government publishes them.
Our thorough quality control process ensures that you have access to practice tests that are as accurate and up-to-date as possible. We believe in the power of well-prepared drivers and are dedicated to providing you with the best study tools to help you succeed on your driver's knowledge exam.
Be the first to rate this test!
Click a star to add your vote
Ask AI Coach
Hi there! I'm Officer Frank