diff --git a/components/webdriver_server/lib.rs b/components/webdriver_server/lib.rs
index 952c3d525528..d9c574e2f75e 100644
--- a/components/webdriver_server/lib.rs
+++ b/components/webdriver_server/lib.rs
@@ -1169,6 +1169,12 @@ impl Handler {
         }
     }
 
+    // https://w3c.github.io/webdriver/#dismiss-alert
+    fn handle_dismiss_alert(&mut self) -> WebDriverResult<WebDriverResponse> {
+        // Since user prompts are not yet implement this will always succeed
+        Ok(WebDriverResponse::Void)
+    }
+
     fn handle_get_timeouts(&mut self) -> WebDriverResult<WebDriverResponse> {
         let session = self
             .session
@@ -1483,6 +1489,7 @@ impl WebDriverHandler<ServoExtensionRoute> for Handler {
             WebDriverCommand::ElementSendKeys(ref element, ref keys) => {
                 self.handle_element_send_keys(element, keys)
             },
+            WebDriverCommand::DismissAlert => self.handle_dismiss_alert(),
             WebDriverCommand::DeleteCookies => self.handle_delete_cookies(),
             WebDriverCommand::GetTimeouts => self.handle_get_timeouts(),
             WebDriverCommand::SetTimeouts(ref x) => self.handle_set_timeouts(x),