diff --git a/generic/tests/yum_update.py b/generic/tests/yum_update.py
index fb7c2a5666ec47d151a503653eb3cb1b81f4217e..4b3863983ebc58181b071d642bc5858602c35997 100644
--- a/generic/tests/yum_update.py
+++ b/generic/tests/yum_update.py
@@ -43,8 +43,9 @@ def run(test, params, env):
     timeout = int(params.get("login_timeout", 360))
     session = vm.wait_for_login(timeout=timeout)
 
-    internal_yum_update(session, "yum update", params.get("shell_prompt"), 600)
-    internal_yum_update(session, "yum update kernel",
+    internal_yum_update(session, "yum update --nogpgcheck",
+                        params.get("shell_prompt"), 600)
+    internal_yum_update(session, "yum update kernel --nogpgcheck",
                         params.get("shell_prompt"), 600)
 
     session.close()
diff --git a/qemu/tests/cfg/live_snapshot_chain.cfg b/qemu/tests/cfg/live_snapshot_chain.cfg
index edd97fd82fe9dec60dfa01abf6e43b3154c3e603..88e9224fc2c986062a48218b2aac4beda93c2846 100644
--- a/qemu/tests/cfg/live_snapshot_chain.cfg
+++ b/qemu/tests/cfg/live_snapshot_chain.cfg
@@ -20,7 +20,7 @@
             pre_snapshot_cmd = {monitor:stop}
             post_snapshot_cmd = {monitor:cont}
         - update:
-            post_snapshot_cmd = {shell:yum update -y}
+            post_snapshot_cmd = {shell:yum update -y --nogpgcheck}
             check_base_image_image1 = yes
             Ubuntu:
                 post_snapshot_cmd = {shell:apt-get update -y}