diff --git a/bp2build/conversion_test.go b/bp2build/conversion_test.go
index cbffaa0..89dd38e 100644
--- a/bp2build/conversion_test.go
+++ b/bp2build/conversion_test.go
@@ -134,7 +134,7 @@
 		},
 		{
 			dir:      "metrics",
-			basename: "converted_modules.txt",
+			basename: "converted_modules.json",
 		},
 		{
 			dir:      "metrics",