1 files changed, 4 insertions, 0 deletions
diff --git a/testing/talos/talos/tests/devtools/addon/content/pages/custom/inspector/iframe.html b/testing/talos/talos/tests/devtools/addon/content/pages/custom/inspector/iframe.html
index 894f647089..7926f65aac 100644
--- a/testing/talos/talos/tests/devtools/addon/content/pages/custom/inspector/iframe.html
+++ b/testing/talos/talos/tests/devtools/addon/content/pages/custom/inspector/iframe.html
@@ -58,6 +58,10 @@
         font-family: Arial;
         margin: 20px;
       }`;
+      manyCssRules += `
+      .many-css-rules::after {
+        content: "rule #${i}";
+      }`;
     }
 
     let CSS_VARIABLES_COUNT = 300;