QtPen draw wrong border for Rectangle (PyQt)

[Goodwin]

Hello everyone!
I try to draw the Rectangle:

paint.setBrush(QtGui.QBrush(some gradient))
paint.setPen(QtGui.QPen(QtGui.QColor("black"), 1))
paint.drawRect(x, y, width, height)

paint.setBrush(QtGui.QBrush(some gradient))
paint.setPen(QtGui.QPen(QtGui.QColor("black"), 1))
paint.drawRect(x, y, width, height)

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as the result, this:

rhs8z5.jpg

Why QPen border on top and on right side are shifted?
left and bottom border correct