Platform specific regex pattern question

[pyrooka]

Hello! I'm wondering about something and would like to ask some help/verification.
So, in the client there is a regex pattern which validates against errors caused by untrusted certificates.

go-retryablehttp/client.go

Line 86 in 40b0cad

notTrustedErrorRe = regexp.MustCompile(`certificate is not trusted`)

However, in the Go source code I see the following

macosErr:   "x509: “valid.testing.golang.invalid” certificate is not trusted",
windowsErr: "x509: certificate signed by unknown authority",

source
Does this mean there should be a different, platform specific regex pattern for Windows?