diff --git a/.github/workflows/simulation.yml b/.github/workflows/simulation.yml
index f6560d265..dafbe8bb4 100644
--- a/.github/workflows/simulation.yml
+++ b/.github/workflows/simulation.yml
@@ -289,6 +289,7 @@ jobs:
         fail_ci_if_error: true
     - name: Run TUN Mode
       run: |
+        sudo rm /etc/apt/sources.list.d/* && sudo apt-get update
         sudo apt-get install --no-install-recommends -y dnsmasq bind9-host ntp
         sudo systemctl start dnsmasq ntp
         host ipv6.google.com 127.0.0.1