diff --git a/testsuite/tests/ghci/T23405/all.T b/testsuite/tests/ghci/T23405/all.T
index 6479163c9e83a1c787253ec1fd01e5e2f7c9b2c3..cbdc8f5a474565404d1bebb81c7c01181e871c3b 100644
--- a/testsuite/tests/ghci/T23405/all.T
+++ b/testsuite/tests/ghci/T23405/all.T
@@ -1 +1 @@
-test('T23405', [extra_files(['T23405.hs'])], ghci_script, ['T23405.script'])
+test('T23405', [copy_files,extra_files(['T23405.hs'])], ghci_script, ['T23405.script'])