diff -u b/core/modules/filter/src/Tests/Migrate/d7/MigrateFilterFormatTest.php b/core/modules/filter/src/Tests/Migrate/d7/MigrateFilterFormatTest.php
--- b/core/modules/filter/src/Tests/Migrate/d7/MigrateFilterFormatTest.php
+++ b/core/modules/filter/src/Tests/Migrate/d7/MigrateFilterFormatTest.php
@@ -60,7 +60,15 @@
     $this->assertEntity('full_html', 'Full HTML', ['filter_autop', 'filter_htmlcorrector', 'filter_url']);
 
     // The plain text format is skipped by the source plugin.
-    $this->assertNull(FilterFormat::load('drupal_7_plain_text'));
+    $this->assertNull(FilterFormat::load('plain_text'));
+
+    // Ensure that filter-specific settings were migrated.
+    /** @var \Drupal\filter\FilterFormatInterface $format */
+    $format = FilterFormat::load('filtered_html');
+    $config = $format->filters('filter_html')->getConfiguration();
+    $this->assertIdentical('<div> <span> <ul> <li>', $config['settings']['allowed_html']);
+    $config = $format->filters('filter_url')->getConfiguration();
+    $this->assertIdentical(128, $config['settings']['filter_url_length']);
   }
 
 }
only in patch2:
unchanged:
--- a/core/modules/migrate_drupal/src/Tests/Table/d7/Filter.php
+++ b/core/modules/migrate_drupal/src/Tests/Table/d7/Filter.php
@@ -119,7 +119,7 @@ public function load() {
       'name' => 'filter_html',
       'weight' => '1',
       'status' => '1',
-      'settings' => 'a:3:{s:12:"allowed_html";s:74:"<a> <em> <strong> <cite> <blockquote> <code> <ul> <ol> <li> <dl> <dt> <dd>";s:16:"filter_html_help";i:1;s:20:"filter_html_nofollow";i:0;}',
+      'settings' => 'a:3:{s:12:"allowed_html";s:22:"<div> <span> <ul> <li>";s:16:"filter_html_help";i:1;s:20:"filter_html_nofollow";i:0;}',
     ))->values(array(
       'format' => 'filtered_html',
       'module' => 'filter',
@@ -140,7 +140,7 @@ public function load() {
       'name' => 'filter_url',
       'weight' => '0',
       'status' => '1',
-      'settings' => 'a:1:{s:17:"filter_url_length";i:72;}',
+      'settings' => 'a:1:{s:17:"filter_url_length";s:3:"128";}',
     ))->values(array(
       'format' => 'full_html',
       'module' => 'filter',
@@ -215,4 +215,4 @@ public function load() {
   }
 
 }
-#26810a92f8dcd637a67b91e218441083
+#d47ad1c59579daa0db744321977c5e4b