# tkz-fct thick line in function affects draw points thickness

While defining the thickness of a line plotted I've noticed that the drawn points change as well. This only happens when using the \tkzFct command and not \draw.

\documentclass{standalone}

\usepackage{tkz-fct}

\begin{document}
\begin{tikzpicture}[scale=.6]
\tkzInit[xmin=-3,xmax=5.5, ymin=-3, ymax=6]
\tkzAxeXY
\tkzDefPoints{2/5/A, 2/3/B, 5/-2/C}
\tkzFct[domain=-1:2,thick]{x**2+1}
\tkzDrawPoints[fill=white, size=4mm](A)
\tkzDrawPoints[fill=black, size=4mm](B,C)
\end{tikzpicture}
\end{document}


How would I have to write the instruction so that it didn't have this effect? How to change the points back to normal?

You could use a scope environment

\documentclass{standalone}

\usepackage{tkz-fct}

\begin{document}
\begin{tikzpicture}[scale=.6]
\tkzInit[xmin=-3,xmax=5.5, ymin=-3, ymax=6]
\tkzAxeXY
\tkzDefPoints{2/5/A, 2/3/B, 5/-2/C}
\begin{scope}
\tkzFct[domain=-1:2,thick]{x**2+1}
\end{scope}
\tkzDrawPoints[fill=white, size=4mm](A)
\tkzDrawPoints[fill=black, size=4mm](B,C)
\end{tikzpicture}
\end{document}