diff --git a/components/webdriver_server/lib.rs b/components/webdriver_server/lib.rs
index 4710c23dd26..f475b9c7d66 100644
--- a/components/webdriver_server/lib.rs
+++ b/components/webdriver_server/lib.rs
@@ -678,6 +678,10 @@ impl Handler {
                         "setWindowRect".to_string(),
                         json!(servo_capabilities.set_window_rect),
                     );
+                    processed.insert(
+                        "userAgent".to_string(),
+                        servo_config::pref!(user_agent).into(),
+                    );
 
                     let response =
                         NewSessionResponse::new(session.id.to_string(), Value::Object(processed));
diff --git a/tests/wpt/meta/webdriver/tests/classic/new_session/response.py.ini b/tests/wpt/meta/webdriver/tests/classic/new_session/response.py.ini
deleted file mode 100644
index b5c5cede365..00000000000
--- a/tests/wpt/meta/webdriver/tests/classic/new_session/response.py.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[response.py]
-  [test_capability_user_agent]
-    expected: FAIL