(Language: R) How to get list.files to read in an array of files in the same order as Windows

Is there a way to list files in R as it is listed in Windows when sorted by "Name"?

For instance, say I have a Directory (henceforth "testDir") that has the following files:

1.txt
2.txt
3.txt
11.txt
111.txt

If I do the following in R:

testFiles = list.files(path = testDir, full.names = F)

testFiles will have the following output:

> testFiles
[1] "1.txt"   "11.txt"  "111.txt" "2.txt"   "3.txt"  

However, I would like it to be orderer as such:

"1.txt"   "2.txt"  "3.txt" "11.txt"   "111.txt"  

Is there another way of reading in these files? It should be noted that the timestamp for these files are not in any specific order.