diff --git a/components/script/dom/fakexrinputcontroller.rs b/components/script/dom/fakexrinputcontroller.rs
index 4756baf5f0a..67e6f72cf70 100644
--- a/components/script/dom/fakexrinputcontroller.rs
+++ b/components/script/dom/fakexrinputcontroller.rs
@@ -13,7 +13,7 @@ use crate::dom::fakexrdevice::get_origin;
 use crate::dom::globalscope::GlobalScope;
 use dom_struct::dom_struct;
 use ipc_channel::ipc::IpcSender;
-use webxr_api::{InputId, MockDeviceMsg, MockInputMsg};
+use webxr_api::{InputId, MockDeviceMsg, MockInputMsg, SelectEvent, SelectKind};
 
 #[dom_struct]
 pub struct FakeXRInputController {
@@ -79,4 +79,28 @@ impl FakeXRInputControllerMethods for FakeXRInputController {
     fn Reconnect(&self) {
         self.send_message(MockInputMsg::Reconnect)
     }
+
+    /// https://immersive-web.github.io/webxr-test-api/#dom-fakexrinputcontroller-startselection
+    fn StartSelection(&self) {
+        self.send_message(MockInputMsg::TriggerSelect(
+            SelectKind::Select,
+            SelectEvent::Start,
+        ))
+    }
+
+    /// https://immersive-web.github.io/webxr-test-api/#dom-fakexrinputcontroller-endselection
+    fn EndSelection(&self) {
+        self.send_message(MockInputMsg::TriggerSelect(
+            SelectKind::Select,
+            SelectEvent::End,
+        ))
+    }
+
+    /// https://immersive-web.github.io/webxr-test-api/#dom-fakexrinputcontroller-simulateselect
+    fn SimulateSelect(&self) {
+        self.send_message(MockInputMsg::TriggerSelect(
+            SelectKind::Select,
+            SelectEvent::Select,
+        ))
+    }
 }
diff --git a/components/script/dom/webidls/FakeXRInputController.webidl b/components/script/dom/webidls/FakeXRInputController.webidl
index bdfd00a6f91..a50950cdee3 100644
--- a/components/script/dom/webidls/FakeXRInputController.webidl
+++ b/components/script/dom/webidls/FakeXRInputController.webidl
@@ -16,9 +16,9 @@ interface FakeXRInputController {
   void disconnect();
   void reconnect();
 
-  // void startSelection();
-  // void endSelection();
-  // void simulateSelect();
+  void startSelection();
+  void endSelection();
+  void simulateSelect();
 
   // void setSupportedButtons(sequence<FakeXRButtonStateInit> supportedButtons);
   // void updateButtonState(FakeXRButtonStateInit buttonState);