diff --git a/test/unit/workflow_test.rb b/test/unit/workflow_test.rb
index ee33adf0..82e67fa8 100644
--- a/test/unit/workflow_test.rb
+++ b/test/unit/workflow_test.rb
@@ -1,3 +1,4 @@
+#-- encoding: UTF-8
 #-- copyright
 # ChiliProject is a project management system.
 #