I have been using Visual Studio 2022 Enterprise for a while (version 17.14.12 at the moment). When running unit tests, Verify.XUnitV3 used Visual Studio's internal diff tool when a test failed.
After installing JetBrains Rider (and not having used it yet), if a test verify in Visual Studio fails, the HetBrains Rider diff tool is opened. I don't want that.
How can I get the default Visual Studio diff tool back? I tried several suggestions (including asking AI for help), but so far nothing worked.
Someone gave me a tip (outside Stack Overflow), that pointed me into the right direction.
Key is this documentation: Diff Tool Order
I added an environment variable DiffEngine_ToolOrder with the value VisualStudio. That solved the problem.