--- a/gfx/vr/ipc/VRManagerParent.cpp
+++ b/gfx/vr/ipc/VRManagerParent.cpp
@@ -244,16 +244,18 @@ VRManagerParent::RecvControllerListenerR
 
 mozilla::ipc::IPCResult
 VRManagerParent::RecvCreateVRTestSystem()
 {
   VRManager* vm = VRManager::Get();
   vm->CreateVRTestSystem();
   mDisplayTestID = 0;
   mControllerTestID = 0;
+  mVRDisplayTests.Clear();
+  mVRControllerTests.Clear();
   return IPC_OK();
 }
 
 mozilla::ipc::IPCResult
 VRManagerParent::RecvCreateVRServiceTestDisplay(const nsCString& aID, const uint32_t& aPromiseID)
 {
   nsTArray<VRDisplayInfo> displayInfoArray;
   impl::VRDisplayPuppet* displayPuppet = nullptr;