Bash script ignoring command on for loop -

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i'm running basic loop bash script logs multiple linux boxes execute script , after script logs out of every box, wait 60 seconds. problem script not applying command within script. 

#!/bin/bash in `cat test.txt`;  ssh -a -t -o userknownhostsfile=/dev/null -o stricthostkeychecking=no -o batchmode=yes -o connecttimeout=5 $i "sudo puppet agent -t & "; sleep 60; done


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