diff --git a/includes/parser/ParserCache.php b/includes/parser/ParserCache.php
index ad616dc0a2f4e..0644b1785a9d8 100644
--- a/includes/parser/ParserCache.php
+++ b/includes/parser/ParserCache.php
@@ -474,15 +474,12 @@ public function save(
 		}
 
 		// Save the parser output
-		$ret = $this->cache->set(
+		$this->cache->set(
 			$parserOutputKey,
 			$parserOutputData,
 			$expire,
 			BagOStuff::WRITE_ALLOW_SEGMENTS
 		);
-		$jsonstr = substr($parserOutputData, 0, 20);
-		$origstr = substr($parserOutput->getRawText(), 0, 20);
-		wfDebugLog('pcd', "$ret; e: $expire; k: $parserOutputKey; d: $jsonstr; o:  $origstr");
 
 		// ...and its pointer to the local cache.
 		$this->metadataProcCache->set( $pageKey, $metadataData, $expire );
diff --git a/includes/parser/ParserOutput.php b/includes/parser/ParserOutput.php
index cbfe434958e3e..223a47df52a09 100644
--- a/includes/parser/ParserOutput.php
+++ b/includes/parser/ParserOutput.php
@@ -2487,6 +2487,9 @@ protected function toJsonArray(): array {
 			$data['MaxAdaptiveExpiry'] = $this->mMaxAdaptiveExpiry;
 		}
 
+		$trunc_data = substr(json_encode($data, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE), 0, 35);
+		wfDebugLog('pcd', $trunc_data);
+
 		return $data;
 	}