QDir.setNameFilter how to show only files with specific extensions?

Question

setNameFilters isn't working as I would expect, so if anyone can explain if I'm using it incorrectly, or if maybe this is a bug in Qt:

Here is my code sample:

QDir export_folder("C:\path");
QStringList fileList = export_folder.setNameFilters(QStringList()<<"*.exe");

after processing fileList contains the String "test.exe1"

I would expect fileList to only include files with extension .exe NOT .exe*.

If I wanted file extensions longer than .exe I would expect to put in "*.exe*" as my filter.

Can someone help clarify, or do I manually have to process my fileList after the fact?