diff --git a/app/models/code_ocean/file.rb b/app/models/code_ocean/file.rb
index 956d92a7..7bbba9b5 100644
--- a/app/models/code_ocean/file.rb
+++ b/app/models/code_ocean/file.rb
@@ -4,16 +4,6 @@ require File.expand_path('../../uploaders/file_uploader', __dir__)
 require File.expand_path('../../../lib/active_model/validations/boolean_presence_validator', __dir__)
 
 module CodeOcean
-  class FileNameValidator < ActiveModel::Validator
-    def validate(record)
-      existing_files = File.where(name: record.name, path: record.path, file_type_id: record.file_type_id,
-        context_id: record.context_id, context_type: record.context_type).to_a
-      if !existing_files.empty? && (!record.context.is_a?(Exercise) || record.context.new_record?)
-        record.errors[:base] << 'Duplicate'
-      end
-    end
-  end
-
   class File < ApplicationRecord
     include DefaultValues
 
diff --git a/app/validators/code_ocean/file_name_validator.rb b/app/validators/code_ocean/file_name_validator.rb
new file mode 100644
index 00000000..f9161458
--- /dev/null
+++ b/app/validators/code_ocean/file_name_validator.rb
@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+module CodeOcean
+  class FileNameValidator < ActiveModel::Validator
+    def validate(record)
+      existing_files = File.where(name: record.name, path: record.path, file_type_id: record.file_type_id,
+        context_id: record.context_id, context_type: record.context_type).to_a
+      if !existing_files.empty? && (!record.context.is_a?(Exercise) || record.context.new_record?)
+        record.errors[:base] << 'Duplicate'
+      end
+    end
+  end
+end