1502091713068   geckodriver::marionette INFO    Starting browser C:\Program Files\Mozilla Firefox\firefox.exe with args ["-marionette"]
1502091717606   Marionette  INFO    Listening on port 51394
Aug 07, 2017 12:41:58 PM org.openqa.selenium.remote.ProtocolHandshake createSession
INFO: Detected dialect: W3C

Code works properly but showing INFO: Detected dialect: W3C error

1 Answer 1


It is not an ERROR, but INFO it just information shown in the log of the driver.

Most loggers have log-levels, INFO is just one you can ignore most of the time:

INFO Designates informational messages that highlight the progress of the application at coarse-grained level.


The dialect is an internal WebDriver thing you could research it, but I think you should not worry about it.


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