diff --git a/crates/kreuzberg-cli/src/logging.rs b/crates/kreuzberg-cli/src/logging.rs
index ab00fe3..bd14694 100644
--- a/crates/kreuzberg-cli/src/logging.rs
+++ b/crates/kreuzberg-cli/src/logging.rs
@@ -19,6 +19,10 @@ const QUIET_DIRECTIVES: &[&str] = &[
     "hyper_util=warn",
     "hf_hub=info",
     "tower_http=info",
+    // html5ever emits "foster parenting not implemented" warnings for malformed
+    // HTML tables found in PDF-extracted content; these are expected and unfixable
+    // at this level, so suppress below error.
+    "html5ever=error",
 ];
 
 /// Extract the target crate name from a directive string like `"ureq=warn"`.
@@ -219,6 +223,16 @@ mod tests {
         );
     }
 
+    #[test]
+    fn html5ever_suppressed_at_default() {
+        let filter = build_env_filter(None);
+        let directives = filter_directives(&filter);
+        assert!(
+            directives.contains("html5ever=error"),
+            "html5ever must be suppressed to error at default; got: {directives}"
+        );
+    }
+
     #[test]
     fn similar_target_name_does_not_block_suppression() {
         // A user-supplied directive for `hf_hub_server` must NOT cause the