diff --git a/components/webdriver_server/lib.rs b/components/webdriver_server/lib.rs
index a8b68eaadd7..9793a958a54 100644
--- a/components/webdriver_server/lib.rs
+++ b/components/webdriver_server/lib.rs
@@ -148,6 +148,9 @@ 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("takeScreenshot".to_owned(), true.to_json());
+            capabilities.insert("takeElementScreenshot".to_owned(), false.to_json());
             let rv = Ok(WebDriverResponse::NewSession(
                 NewSessionResponse::new(
                     session.id.to_string(),