diff --git a/support/testing/infra/emulator.py b/support/testing/infra/emulator.py
index 3702ee2d48..d690949120 100644
--- a/support/testing/infra/emulator.py
+++ b/support/testing/infra/emulator.py
@@ -98,6 +98,7 @@ class Emulator(object):
                                          "vexpress-v2p-ca9-5.10.202.dtb")
                     qemu_cmd += ["-dtb", dtb]
                     qemu_cmd += ["-M", "vexpress-a9"]
+                    qemu_cmd += ["-device", "virtio-rng-device"]
                 elif arch == "armv5":
                     kernel = infra.download(self.downloaddir,
                                             "kernel-versatile-5.10.202")