diff --git a/lib/Subscribers/ImportExport/Import/Import.php b/lib/Subscribers/ImportExport/Import/Import.php
index 390ebe40b6..7c6315f7c7 100644
--- a/lib/Subscribers/ImportExport/Import/Import.php
+++ b/lib/Subscribers/ImportExport/Import/Import.php
@@ -77,8 +77,7 @@ class Import {
     return $validation_rules;
   }
 
-  function process($a = false) {
-    $this->a = $a;
+  function process() {
     $subscribers_fields = $this->subscribers_fields;
     $subscribers_custom_fields = $this->subscribers_custom_fields;
     $subscribers_data = $this->validateSubscribersData(
diff --git a/tests/unit/Subscribers/ImportExport/Import/ImportTest.php b/tests/unit/Subscribers/ImportExport/Import/ImportTest.php
index 5556dc7b7c..1db4a5542f 100644
--- a/tests/unit/Subscribers/ImportExport/Import/ImportTest.php
+++ b/tests/unit/Subscribers/ImportExport/Import/ImportTest.php
@@ -432,7 +432,7 @@ class ImportTest extends MailPoetTest {
     $timestamp = time() + 1;
     $this->import->created_at = $this->import->required_subscribers_fields['created_at'] = date('Y-m-d H:i:s', $timestamp);
     $this->import->updated_at = date('Y-m-d H:i:s', $timestamp + 1);
-    $result = $this->import->process('boo');
+    $result = $this->import->process();
     expect($result['created'])->equals(1);
     $db_subscribers = Helpers::arrayColumn(
       Subscriber::select('id')->findArray(),