diff --git a/moli-renderer-v8/src/content_security_policy.rs b/moli-renderer-v8/src/content_security_policy.rs
index c2c32f2ab3..0b6bcb7d83 100644
--- a/moli-renderer-v8/src/content_security_policy.rs
+++ b/moli-renderer-v8/src/content_security_policy.rs
@@ -2224,6 +2224,11 @@ mod tests {
                 "https://cdn.test/foo%2cbar",
                 true,
             ),
+            (
+                "img-src https://cdn.test/foo%2cbar",
+                "https://cdn.test/foo,bar",
+                true,
+            ),
             (
                 ", , img-src * , , img-src 'none', ,",
                 "https://cdn.test/asset",