Pyschools Topic 5 Q9 - Failing the private test cases

I'm failing the private test cases and want some help. Here is the question and my code.

Topic 5: Question 9 Create a function that takes in a positive number and return 2 integers such that the number is between the squares of the 2 integers. It returns the same integer twice if the number is a square of an integer.

def sqApprox(num):
    i = 0
    import math
    minsq =  None                  
    maxsq =  None                     
    while i <= math.ceil(num):  
          if i*i == num:
             return (i,i) 
                               
          if i*i<=num and i >minsq:  
             minsq = i
          if i*i>=num and i>maxsq:  
             maxsq = i
          i +=1                        
    return (minsq, maxsq)