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Alt text with filename not flagged by accessibility checker if space in file name

Alt text with filename not flagged by accessibility checker if space in file name

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This behavior has been completed but has not yet been deployed to the production environment. The date of the deploy will be added here when available.

Known issues indicate notable behaviors that has been escalated to the Canvas engineering team. Known issues are not a guarantee for an immediate resolution. This document is for informational purposes only and does not replace the Support process. If you are encountering the behavior outlined in this document, please ensure you have submitted a Support case (per your institution's escalation process) so Canvas Support can adequately gauge the overall customer impact and prioritize appropriately.

When a user uploads an image in the RCE and then runs the accessibility checker, the checker will not flag the image's alt text for including the file name if the file’s name contains a space.

Expected Behavior

It should be flagging the alt text for including the file name, even if the file’s name includes a space.


Removing the spaces from the file name within the alt text will trigger the accessibility checker once again.

Steps to Reproduce


  1. Within the RCE, insert an image whose file name includes a space.

  2. Leave the alt text unchanged and select the Accessibility checker.

  3. Notice that the checker displays “No accessibility issues were detected.” Even though the file name is being included within the alt text of the image.

Additional Info