Please help us help you and fill where relevant:
LimeSurvey version: 6.17 and 7.6
Own server or LimeSurvey Cloud: own server
Survey theme/template: irrelevant
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Hello, 
I have Limesurvey 7.6 installed on a test server and I'm currently checking whether it is suitable to be introduced to our production server. I am wondering what should I test. I have obviously seen this topic: forums.limesurvey.org/forum/installation...s-migration?start=15 and this site: survey-consulting.com/limesurvey-7-migration/ and I either followed or plan to follow their recommendations.

Still I would like to round up as many issues/weird things in general as possible before deciding. Is there anything nonstandard or not mentioned in that article that I should keep in mind?

So far I've come up with:
- testing the way answers are saved - particularly weird date with anonymous surveys ( forums.limesurvey.org/forum/german-forum/159584-zeitstempel )
- potential api connection issues with limonaid
- issues with custom twig files, in my case register_form

Is there anything else worth checking that you can think of or that you know you've already encountered issues with?

joannahawrysz wrote:

So far I've come up with:
- testing the way answers are saved - particularly weird date with anonymous surveys ( forums.limesurvey.org/forum/german-forum/159584-zeitstempel )

There is nothing weird or wrong with the way the date is stored in anonymous surveys. This is the standard behaviour. It is a feature and it  works like this as far as I can remember. Anonymous mode stores a default date to keep the responses anonymous.

- potential api connection issues with limonaid
- issues with custom twig files, in my case register_form

Is there anything else worth checking that you can think of or that you know you've already encountered issues with?

I would mainly test all my important surveys that I would to run unter LS 7.x. Go through it, as people to test them and check how the information is stored.

Special focus I would put on templates, if you use custom templates.