Difference between depend on and depend upon

[Jo]

Test No. errors/advan-1 "Give me the bill", question 9

It depends in your attitude whether or not you adapt to the new demands of a job.

(a) in
(b) whether
(c) adapt to
(d) of

Test No. errors/advan-1 "Give me the bill", answer 9

It depends on your attitude whether or not you adapt to the new demands of a job.

Correct entry: on
The error was: (a) in

You have found the error but your entry is incorrect.
It depends upon your attitude whether or not you adapt to the new demands of a job.
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why not depend upon? Is there any difference between depend on and depend upon, apart from the fact that the latter is more formal? Thanks

[Torsten]

Hi Jo,

You are right, depend upon would be a correct here too. We'll add it as a second answer option. Thanks for pointing out.
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Test Of English for International Communication
TOEIC Preparation & TOEIC Vocabulary