[Python] Get top three items with unique value from dictionary

I have the following dictionary

dict1 = {'apple':50,'banana':20,'orange':50,'peach':20,
'mango':10}


I know how to get the top three items using the following:

def test(x):
return x[1]

sorted(dict1.items(), key=test, reverse=True)[:3]


and I got

[('apple', 50), ('orange', 50), ('banana', 20)]


But notice that apple and orange are of the same value which is 50.

How do I modify the code to get output like this?

[('apple', 50), ('banana', 20), ('mango', 10)]


or

[('orange', 50), ('peach', 20), ('mango', 10)]


So only one of the two fruits with the same value would be listed at random.

I am not sure where to implement random.choice to get one of the two fruits of the same value at random.

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