diff --git a/src/FileMigrationHelper.php b/src/FileMigrationHelper.php
index bfcd53b5..b2d767c0 100644
--- a/src/FileMigrationHelper.php
+++ b/src/FileMigrationHelper.php
@@ -9,7 +9,6 @@
 use SilverStripe\Core\Config\Configurable;
 use SilverStripe\Core\Environment;
 use SilverStripe\Core\Injector\Injectable;
-use SilverStripe\Core\Injector\Injector;
 use SilverStripe\ORM\DataList;
 use SilverStripe\ORM\DataObject;
 use SilverStripe\ORM\DataQuery;
@@ -40,7 +39,7 @@ class FileMigrationHelper
         'logger' => '%$' . LoggerInterface::class,
     ];
 
-    /** @var LoggerInterface */
+    /** @var LoggerInterface|null */
     private $logger;
 
     /**
@@ -89,7 +88,9 @@ public function run($base = null)
             $success = $this->migrateFile($base, $file, $filename);
 
             if ($processedCount % 100 === 0) {
-                $this->logger->info("Iterated $processedCount out of $total files. Migrated $migratedCount files.");
+                if ($this->logger) {
+                    $this->logger->info("Iterated $processedCount out of $total files. Migrated $migratedCount files.");
+                }
             }
 
             $processedCount++;
@@ -118,7 +119,9 @@ protected function migrateFile($base, File $file, $legacyFilename)
         // Make sure this legacy file actually exists
         $path = $base . '/' . $legacyFilename;
         if (!file_exists($path)) {
-            $this->logger->warning("$legacyFilename not migrated because the file does not exist ($path)");
+            if ($this->logger) {
+                $this->logger->warning("$legacyFilename not migrated because the file does not exist ($path)");
+            }
             return false;
         }
 
@@ -129,7 +132,9 @@ protected function migrateFile($base, File $file, $legacyFilename)
             if ($this->config()->get('delete_invalid_files')) {
                 $file->delete();
             }
-            $this->logger->warning("$legacyFilename not migrated because the extension $extension is not a valid extension");
+            if ($this->logger) {
+                $this->logger->warning("$legacyFilename not migrated because the extension $extension is not a valid extension");
+            }
             return false;
         }
 
@@ -179,7 +184,9 @@ protected function migrateFile($base, File $file, $legacyFilename)
             // removing the legacy file since it has been migrated now and not using legacy filenames
             $removed = unlink($path);
             if (!$removed) {
-                $this->logger->warning("$legacyFilename was migrated, but failed to remove the legacy file ($path)");
+                if ($this->logger) {
+                    $this->logger->warning("$legacyFilename was migrated, but failed to remove the legacy file ($path)");
+                }
             }
             return $removed;
         }