Excel VBA - How to call module procedure from Workbook Object after instanciated

Hi,
Is there a way to call and function module from the workbook object after instanciated based on the below scenerio...

The Book1.xlsm contain the macro that open up the Book2.xlsm and is set to workbook object.

e.g
Book1.xlsm
Module1

sub openfile()
      Dim wb as Workbooks.
      Set wb= Workbooks.Open("C:\test\Book2.xlsm",  ReadOnly:=True)
       wb.module1.test    '<-- how to call the procedure in his own module
       wb.module1.test1(wb) <-- how to call the procedure in his own module
End sub

*************

in Book2.xlsm
Module1

sub test1()
        msgbox ("Hi")

end sub

sub test2( wb as workbooks)
        bla bla bla...
       
end sub

Thank you.

best regards
YK