Returning pointer to char

Question

I don't understand why the print functions returns (null):

TestTest inside function
(null) after function call

Code:

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
void get_string(char* name){
    char* b ="TestTest";
    name = (char *)malloc(sizeof(char)*strlen(b)+1);
    strcpy(name,b);
    printf("%s inside function\n",name);
}

int main(){
    char *name; 
    get_string(name);
    printf("%s after function call\n",name);
    
    free(name);
    
}