diff --git a/adminer/drivers/clickhouse.inc.php b/adminer/drivers/clickhouse.inc.php
index d72109d5..99c77ab8 100644
--- a/adminer/drivers/clickhouse.inc.php
+++ b/adminer/drivers/clickhouse.inc.php
@@ -22,7 +22,7 @@ if (isset($_GET["clickhouse"])) {
 				return $file;
 			}
 			if (!preg_match('~^HTTP/[0-9.]+ 2~i', $http_response_header[0])) {
-				$this->error = $file;
+				$this->error = lang('Invalid credentials.') . " $http_response_header[0]";
 				return false;
 			}
 			$return = json_decode($file, true);
diff --git a/adminer/drivers/elastic.inc.php b/adminer/drivers/elastic.inc.php
index a29252fe..f2abfad7 100644
--- a/adminer/drivers/elastic.inc.php
+++ b/adminer/drivers/elastic.inc.php
@@ -28,7 +28,7 @@ if (isset($_GET["elastic"])) {
 					return $file;
 				}
 				if (!preg_match('~^HTTP/[0-9.]+ 2~i', $http_response_header[0])) {
-					$this->error = $file;
+					$this->error = lang('Invalid credentials.') . " $http_response_header[0]";
 					return false;
 				}
 				$return = json_decode($file, true);
diff --git a/changes.txt b/changes.txt
index cb729dec..11f501af 100644
--- a/changes.txt
+++ b/changes.txt
@@ -1,4 +1,5 @@
 Adminer 4.7.9-dev:
+Elasticsearch, ClickHouse: Do not print response if HTTP code is not 200
 Re-enable PHP warnings (regression from 4.7.8)
 
 Adminer 4.7.8 (released 2020-12-06):