How to construct a vector with unique pointers

I try to construct a vector with unique_ptr. But I do not find a direct way. The following code does not compiles. The error is:Call to implicitly-deleted copy constructor of 'std::__1::unique_ptr >':

#include <iostream>
#include <memory>
#include <utility>
#include <vector>
class test1{
public:
    test1(){};
    test1(test1&&)=default;
};

int main(int argc, const char * argv[]) {
    std::unique_ptr<test1> us(new test1());
    std::vector<std::unique_ptr<test1>> vec{move(us)};
    return 0;
}