iOS Swift Missing Required Module LegacyCoreKit UnitTest XCTest

I have issue with my UnitTest target.
When I try to run unit test I got error Missing required module 'LegacyCoreKit'
I have no idea what is this framework for. I can't find it in my project and I can't find it in Google.

Do you have any idea where to find this module or how to fix it?

I tried to find this module in Google but there is no sign of it

I am able to resolve this issue. In my case, this was happening due to SPM modules were not being added in Tests target which were being used in project target.

• Select the Tests target
• Go to Build Phases
• In section Link Binary with Libraries, add all the modules which were used in project target

After performing the above mentioned steps, Run the Tests using Command + U. It will be succeeded

I Solved this with "Clean Build Folder"

You just need to add the modulars and set headers to true.

update pod like this,

pod 'LIBRARY WICH YOU NEED TO ADD', :modular_headers => true

In my case Firebase libraries, GoogleSignIn and FacebookSignIn are required to run the tests, so I got the 'LegacyCoreKit' warning. I added these libraries to TestTarget -> Build Phases and the issue was solved.