diff --git a/src/wireviz/wv_harness.py b/src/wireviz/wv_harness.py
index f956188..1f45ae0 100644
--- a/src/wireviz/wv_harness.py
+++ b/src/wireviz/wv_harness.py
@@ -378,7 +378,7 @@ class Harness:
         # bomlist = bom_list(self.bom())
         bomlist = [[]]
         if "tsv" in fmt:
-            open_file_write(f"{filename}.bom.tsv").write(tuplelist2tsv(bomlist))
+            open_file_write(f"{filename}.tsv").write(tuplelist2tsv(bomlist))
         if "csv" in fmt:
             # TODO: implement CSV output (preferrably using CSV library)
             print("CSV output is not yet supported")