diff --git a/feature-policy/experimental-features/lazyload/lazyload-disabled-tentative.sub.html b/feature-policy/experimental-features/lazyload/lazyload-disabled-tentative.sub.html
index 5b9034b63841209..772998a8287d78d 100644
--- a/feature-policy/experimental-features/lazyload/lazyload-disabled-tentative.sub.html
+++ b/feature-policy/experimental-features/lazyload/lazyload-disabled-tentative.sub.html
@@ -25,7 +25,7 @@
       "http://{{hosts[alt][www]}}:{{ports[http][0]}}/" +
       "feature-policy/experimental-features/resources/lazyload-contents.html";
 
-  let load_timeout = 400; // ms
+  let load_timeout = 600; // ms
   let expected_timeout_msg = false;
 
   window.scrollTo(0, 0);
diff --git a/feature-policy/experimental-features/lazyload/lazyload-enabled-tentative.sub.html b/feature-policy/experimental-features/lazyload/lazyload-enabled-tentative.sub.html
index 2e0a791f374ceca..058b025446bbe06 100644
--- a/feature-policy/experimental-features/lazyload/lazyload-enabled-tentative.sub.html
+++ b/feature-policy/experimental-features/lazyload/lazyload-enabled-tentative.sub.html
@@ -25,7 +25,7 @@
       "http://{{hosts[alt][www]}}:{{ports[http][0]}}/" +
       "feature-policy/experimental-features/resources/lazyload-contents.html";
 
-  let load_timeout = 400; // ms
+  let load_timeout = 600; // ms
   let expected_timeout_msg = false;
   let expected_load_msg = "This page is lazyloaded.";