diff --git a/src/CssLint/Referential/NonStandard/PropertiesReferential.php b/src/CssLint/Referential/NonStandard/PropertiesReferential.php
index 47b6c8f..03c2337 100644
--- a/src/CssLint/Referential/NonStandard/PropertiesReferential.php
+++ b/src/CssLint/Referential/NonStandard/PropertiesReferential.php
@@ -138,6 +138,9 @@ class PropertiesReferential extends AbstractReferential
         'initial-letter-wrap' => true,
         'inline-sizing' => true,
         'input-security' => true,
+        'interest-delay' => true,
+        'interest-delay-end' => true,
+        'interest-delay-start' => true,
         'item-cross' => true,
         'item-direction' => true,
         'item-flow' => true,