How to include a .dll in xUnit Tests?

I have a project dedicated for testing using xUnit. I get the following error in some of my tests:

Message: System.ArgumentException : The ADO.NET provider with invariant name 'Devart.Data.oracle' is either not registered in the machine or app config file, or could not be loaded.

I have referenced the Devart.Data.oracle.dll in the project references but I feel like I need to something equivalent to like a .runsettings file like you would use in MSTest to get it into the actual tests. Does anyone know how to do this?