To test our editing features developed in the OpenRefine-SDC project, it would be useful to use a test instance of Commons rather than directly make edits to the official Wikimedia Commons instance.
@Spinster, do you know which one you should use? If I remember correctly, there are multiple ones around. For instance I found https://commons.wikimedia.beta.wmflabs.org/wiki/Main_Page but I am not sure this one is appropriate for us to do test uploads.
Once we know which instance we should use, could @Eugene233 deploy an instance of the reconciliation service for that Commons instance? (For instance with a dedicated Toolforge project).