--- a/src_test/dune
+++ b/src_test/dune
@@ -1,6 +1,6 @@
 (executable
  (name test_ppx_yojson)
- (libraries oUnit result)
+ (libraries ounit2 result)
  (preprocess (pps ppx_deriving.show ppx_deriving_yojson))
  (flags (:standard -w -9-39-27-34-37)))