Rename the multiple files which matching certain string - linux

Ex: 

test1_test2.txt 

 test1_test3.txt 

 test1_test4.txt 

 $ ls * | sed -e 'p;s/test1/XYZ/' | xargs -n2 mv 

 Output: XYZ_test2.txt XYZ_test3.txt XYZ_test4.txt