diff -u b/core/modules/file/src/Plugin/migrate/process/FileCopy.php b/core/modules/file/src/Plugin/migrate/process/FileCopy.php
--- b/core/modules/file/src/Plugin/migrate/process/FileCopy.php
+++ b/core/modules/file/src/Plugin/migrate/process/FileCopy.php
@@ -184,9 +184,7 @@
     if ($this->isLocalUri($source) && $this->isLocalUri($destination)) {
       return $this->fileSystem->realpath($source) === $this->fileSystem->realpath($destination);
     }
-    else {
-      return FALSE;
-    }
+    return FALSE;
   }
 
   /**