diff --git a/src/Entity/Index.php b/src/Entity/Index.php
index 3fe38b9..2382cb8 100644
--- a/src/Entity/Index.php
+++ b/src/Entity/Index.php
@@ -490,6 +490,9 @@ class Index extends ConfigEntityBase implements IndexInterface {
       'weights' => array(),
       'settings' => $settings,
     );
+
+    // Reset processors static cache.
+    $this->processorInstances = array();
   }
 
   /**
@@ -497,6 +500,9 @@ class Index extends ConfigEntityBase implements IndexInterface {
    */
   public function removeProcessor($processor_id) {
     unset($this->processor_settings[$processor_id]);
+
+    // Reset processors static cache.
+    $this->processorInstances = array();
   }
 
   /**
diff --git a/src/Tests/IntegrationTest.php b/src/Tests/IntegrationTest.php
index 0ef3d1b..a34e452 100644
--- a/src/Tests/IntegrationTest.php
+++ b/src/Tests/IntegrationTest.php
@@ -97,7 +97,6 @@ class IntegrationTest extends WebTestBase {
     $this->deleteServer();
   }
 
-
   /**
    * Test what happens when an index has an integer as id/label.
    *