Warning "object ‘CsparseMatrix’ is not exported by 'namespace:Matrix' "

[FareheSoheil]

I get the warning:

Warning message:
object ‘CsparseMatrix’ is not exported by 'namespace:Matrix' 

when running the followings in the R terminal:

devtools::test()

devtools::run_examples()

I run the above commands in the /test folder of the project.