marionette: correct error when there is no current session (#701)

Fixes: https://github.com/mozilla/geckodriver/issues/689

1 files changed, 1 insertions, 1 deletions

diff --git a/src/marionette.rs b/src/marionette.rs
index 35e0be9..81463c2 100644
--- a/src/marionette.rs
+++ b/src/marionette.rs
@@ -504,7 +504,7 @@ impl WebDriverHandler<GeckoExtensionRoute> for MarionetteHandler {
                             },
                             _ => {
                                 return Err(WebDriverError::new(
-                                    ErrorStatus::UnknownError,
+                                    ErrorStatus::SessionNotCreated,
                                     "Tried to run command without establishing a connection"));
                             }
                         }