diff --git a/tests/unit/ws/t_ws.ml b/tests/unit/ws/t_ws.ml
index 3bde8eba..48d3b09b 100644
--- a/tests/unit/ws/t_ws.ml
+++ b/tests/unit/ws/t_ws.ml
@@ -1,5 +1,3 @@
-open Test_util
-
 let read_file file : string =
   let buf = Buffer.create 32 in
   let ic = open_in_bin file in