diff --git a/config/install/replication.replication_settings.published.yml b/config/install/replication.replication_settings.published.yml
index 87314bd..72555bf 100644
--- a/config/install/replication.replication_settings.published.yml
+++ b/config/install/replication.replication_settings.published.yml
@@ -5,4 +5,4 @@ id: published
 label: Replicate published entities
 filter_id: published
 parameters:
-  include_unpublishable_entities: FALSE
+  include_unpublishable_entities: false
diff --git a/src/ReplicationTask/ReplicationTask.php b/src/ReplicationTask/ReplicationTask.php
index 91ccc14..8ec4cd8 100644
--- a/src/ReplicationTask/ReplicationTask.php
+++ b/src/ReplicationTask/ReplicationTask.php
@@ -10,7 +10,7 @@ use Drupal\replication\ReplicationTask\ReplicationTaskInterface;
 class ReplicationTask implements ReplicationTaskInterface {
 
   /**
-   * The id of the filter plugin to use during replication.
+   * The ID of the filter plugin to use during replication.
    *
    * @var string
    */
@@ -56,7 +56,7 @@ class ReplicationTask implements ReplicationTaskInterface {
     if (!is_array($this->parameters)) {
       $this->setParameters([]);
     }
-    $this->parameters->set($name, $value);
+    $this->parameters[$name] = $value;
     return $this;
   }
 
diff --git a/src/ReplicationTask/ReplicationTaskInterface.php b/src/ReplicationTask/ReplicationTaskInterface.php
index 1c9b2e4..3280745 100644
--- a/src/ReplicationTask/ReplicationTaskInterface.php
+++ b/src/ReplicationTask/ReplicationTaskInterface.php
@@ -14,10 +14,10 @@ namespace Drupal\replication\ReplicationTask;
 interface ReplicationTaskInterface {
 
   /**
-   * Set the id of the filter plugin to use during replication.
+   * Set the ID of the filter plugin to use during replication.
    *
    * @param string $filter_name
-   *   The plugin id of a ReplicationFilterInterface.
+   *   The plugin ID of a ReplicationFilterInterface.
    *
    * @return ReplicationTaskInterface
    *   Returns $this.
@@ -25,17 +25,17 @@ interface ReplicationTaskInterface {
   public function setFilter($filter_name = NULL);
 
   /**
-   * Get the id of the filter plugin to use during replication.
+   * Get the ID of the filter plugin to use during replication.
    *
    * @return string
-   *   The plugin id of a ReplicationFilterInterface.
+   *   The plugin ID of a ReplicationFilterInterface.
    */
   public function getFilter();
 
   /**
    * Set the parameters for the filter plugin.
    *
-   * @param array|NULL $parameters_array
+   * @param array|NULL $parameters
    *   An associative array of name-value parameters.
    *
    * @return ReplicationTaskInterface
diff --git a/tests/src/Functional/ReplicationFilterTest.php b/tests/src/Functional/ReplicationFilterTest.php
index ee13dad..57c6213 100644
--- a/tests/src/Functional/ReplicationFilterTest.php
+++ b/tests/src/Functional/ReplicationFilterTest.php
@@ -78,7 +78,7 @@ class ReplicationFilterTest extends WebTestBase {
 
     $parameters = ['uuids' => [$entity1->uuid()]];
     $changes = $changes_factory->get($workspace)->filter('uuid')->parameters($parameters)->getNormal();
-    $this->assertEqual(1, count($changes), 'Expect there is 1 entity in the changeset for UUIDs filter.');
+    $this->assertCount(1, $changes, 'Expect there is 1 entity in the changeset for UUIDs filter.');
   }
 
   /**
@@ -110,7 +110,7 @@ class ReplicationFilterTest extends WebTestBase {
     $entity2->save();
 
     $changes = $changes_factory->get($workspace)->filter('published')->getNormal();
-    $this->assertEqual(1, count($changes), 'Expect there is 1 entity in the changeset for published filter.');
+    $this->assertCount(1, $changes, 'Expect there is 1 entity in the changeset for published filter.');
   }
 
   /**
@@ -145,7 +145,7 @@ class ReplicationFilterTest extends WebTestBase {
 
     $parameters = ['types' => ['node.article']];
     $changes = $changes_factory->get($workspace)->filter('entity_type')->parameters($parameters)->getNormal();
-    $this->assertEqual(1, count($changes), 'Expect there is 1 entity in the changeset for entity type filter.');
+    $this->assertCount(1, $changes, 'Expect there is 1 entity in the changeset for entity type filter.');
   }
 
 }
diff --git a/tests/src/Kernel/Plugin/ReplicationFilter/PublishedFilterTest.php b/tests/src/Kernel/Plugin/ReplicationFilter/PublishedFilterTest.php
index 53e2e11..9e6baf5 100644
--- a/tests/src/Kernel/Plugin/ReplicationFilter/PublishedFilterTest.php
+++ b/tests/src/Kernel/Plugin/ReplicationFilter/PublishedFilterTest.php
@@ -60,7 +60,7 @@ class PublishedFilterTest extends KernelTestBase {
    * @param string $entity_type_id
    *   The entity type id of the entity to create for testing.
    * @param array $entity_values
-   *   The values to pass to $class::create().
+   *   The values with which to create the entity.
    * @param bool $expected
    *   The expected return value from the filter function.
    *
diff --git a/tests/src/Kernel/ReplicationSettingsTest.php b/tests/src/Kernel/ReplicationSettingsTest.php
index cad3beb..b4c2632 100644
--- a/tests/src/Kernel/ReplicationSettingsTest.php
+++ b/tests/src/Kernel/ReplicationSettingsTest.php
@@ -3,7 +3,6 @@
 namespace Drupal\Tests\replication\Kernel;
 
 use Drupal\KernelTests\KernelTestBase;
-use Drupal\replication\Entity\ReplicationSettings;
 
 /**
  * Test operations on ReplicationSettings config entity.
@@ -40,7 +39,6 @@ class ReplicationSettingsTest extends KernelTestBase {
       'filter_id' => 'entity_type',
       'parameters' => ['entity_type_id' => 'node', 'bundle' => 'article'],
     ]);
-    $this->assertInstanceOf(ReplicationSettings::class, $entity, 'Replication Settings entity was created.');
     $entity->save();
 
     $entity = $entityTypeManager->getStorage('replication_settings')->load('test');