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Thanks!
Just a wild guess.
Since there is an “empty can” test and “full can” test, maybe the “empty can” test might also be called the “open can” test?
The rotator cuff can be divided into three functional groups for strength testing: internal rotation (subscapularis), external rotation (infraspinatus and teres minor), and forward flexion (supraspinatus).
Specific functional tests include the empty can test, full can test, and drop arm test for the supraspinatus; the hornblower’s sign to evaluate the infraspinatus and teres minor; and the belly press and lift off test to evaluate the subscapularis.
http://www.pagepress.org/journals/index.php/rr/article/viewFile/rr.2010.e1/1905
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