There was an error adding this card error on Testing Payments

New Member
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I have my shop in Test mode. Using Shopify Payments. I have tried all the test credit cards numbers provided. How can I resolve this problem?


Shopify Staff
Shopify Staff
875 89 137

Hi, @cddyson. Welcome to the Community, and thanks for reaching out about this. Running a test on your checkout is a really proactive step to take so that you can eliminate any unexpected issues  your customers may encounter when trying to make a purchase. Let's look into it!


The first step is to double check the parameters you’ve mentioned above to ensure everything is enabled correctly, and that nothing small is being missed:


  • Please confirm that Shopify Payments is in test mode by going to ‘Settings > Payments’. You should see a yellow banner notifying you of it, which looks like this:



  • If the yellow banner is not there, please proceed to enabling test mode as seen in the screenshot below. Click on ‘Manage’ and scroll down to the Test mode section. Check the Enable test mode box. Click SAVE.



  • Please confirm that you are using the test credit card details for Shopify Payments from this Help Doc.


Let me know once you've double checked your test mode setup, and I'll simulate a transaction from my end to continue investigating what’s happening. (Thanks for providing your domain name, by the way!). I'll watch for your reply. 

Helen | Social Care @ Shopify 
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