diff --git a/components/webdriver_server/lib.rs b/components/webdriver_server/lib.rs
index 79cf1e668a9..56e52e53954 100644
--- a/components/webdriver_server/lib.rs
+++ b/components/webdriver_server/lib.rs
@@ -303,7 +303,7 @@ impl Handler {
             let mut capabilities = BTreeMap::new();
             capabilities.insert("browserName".to_owned(), "servo".to_json());
             capabilities.insert("browserVersion".to_owned(), "0.0.1".to_json());
-            capabilities.insert("acceptSslCerts".to_owned(), false.to_json());
+            capabilities.insert("acceptInsecureCerts".to_owned(), false.to_json());
             let rv = Ok(WebDriverResponse::NewSession(
                 NewSessionResponse::new(
                     session.id.to_string(),