diff --git a/contrib/book_simweights_testdata.py b/contrib/book_simweights_testdata.py
index d6c7a2b..da34a8f 100755
--- a/contrib/book_simweights_testdata.py
+++ b/contrib/book_simweights_testdata.py
@@ -143,7 +143,7 @@ def fake_event_header(frame: dict) -> None:
     tray.Execute()
     del tray
 
-tarfilename = "/data/ana/Software/simweights/test-data/simweights_testdata_test.tar.gz"
+tarfilename = "/data/ana/Software/simweights/test-data/simweights_testdata.tar.gz"
 print(f"Writing tarfile {tarfilename}")
 
 with tarfile.open(tarfilename, "w:gz") as tar: