diff -u b/core/modules/system/system.admin.inc b/core/modules/system/system.admin.inc
--- b/core/modules/system/system.admin.inc
+++ b/core/modules/system/system.admin.inc
@@ -821,7 +821,7 @@
     '#title' => t('Search module list'),
     '#title_display' => 'invisible',
     '#size' => 20,
-    '#placeholder' => t('Search module...'),
+    '#placeholder' => t('Search modules...'),
     '#attributes' => array(
       'class' => array('table-filter-text'),
       'data-table' => '#system-modules',
diff -u b/core/modules/system/system.modules.js b/core/modules/system/system.modules.js
--- b/core/modules/system/system.modules.js
+++ b/core/modules/system/system.modules.js
@@ -78,7 +78,7 @@
   attach: function (context, settings) {
     var $input = $('input.table-filter-text').once('table-filter-text');
     var $table = $($input.attr('data-table'));
-    var $rowsAndDetails, $labels, $details;
+    var $rows, $rowsAndDetails, $details;
 
     function hidePackageDetails(index, element) {
       var $details = $(element);
@@ -89,15 +89,16 @@
     function filterModuleList (e) {
       var query = $(e.target).val().toLowerCase();
 
-      function showModuleRow (index, element) {
-        var $element = $(element);
-        var textMatch = $element.text().toLowerCase().indexOf(query) !== -1;
-        $element.closest('tr').toggle(textMatch);
+      function showModuleRow (index, row) {
+        var $row = $(row);
+        var $sources = $row.find('.table-filter-text-source');
+        var textMatch = $sources.text().toLowerCase().indexOf(query) !== -1;
+        $row.toggle(textMatch);
       }
 
       // Filter if the length of the query is at least 2 characters.
       if (query.length >= 2) {
-        $labels.each(showModuleRow);
+        $rows.each(showModuleRow);
 
         // Hide the package <details> if they don't have any visible rows.
         // Note that we first show() all <details> to be able to use ':visible'.
@@ -110,7 +111,7 @@
 
     if ($table.length) {
       $rowsAndDetails = $table.find('tr, details');
-      $labels = $table.find('.table-filter-text-source');
+      $rows = $table.find('tbody tr');
       $details = $table.find('details');
 
       // @todo Use autofocus attribute when possible.