diff --git a/dune-project b/dune-project
index 2e08fc3..b9cf574 100644
--- a/dune-project
+++ b/dune-project
@@ -21,5 +21,4 @@
   ctypes
   ctypes-foreign
   (ounit2 :with-test)
-  (stdio :with-test)
  ))
diff --git a/gobject-introspection.opam b/gobject-introspection.opam
index 9539fa6..81a8254 100644
--- a/gobject-introspection.opam
+++ b/gobject-introspection.opam
@@ -22,7 +22,6 @@ depends: [
   "ctypes"
   "ctypes-foreign"
   "ounit2" {with-test}
-  "stdio" {with-test}
   "odoc" {with-doc}
 ]
 build: [
diff --git a/tests/Test_version.ml b/tests/Test_version.ml
index 3f903f0..f93fd6b 100644
--- a/tests/Test_version.ml
+++ b/tests/Test_version.ml
@@ -1,7 +1,14 @@
 open Test_utils
 open OUnit2
 open GObject_introspection
-open Stdio
+
+let input_lines ch =
+  let rec aux acc =
+    match input_line ch with
+    | exception End_of_file -> List.rev acc
+    | line -> aux (line :: acc)
+  in
+  aux []
 
 let test_get_version _ =
   let major = Version.get_major_version () |> string_of_int in
@@ -10,8 +17,9 @@ let test_get_version _ =
   let version = String.concat "." [ major; minor; micro ] in
   let run cmd =
     let inp = Unix.open_process_in cmd in
-    let r = In_channel.input_lines inp in
-    In_channel.close inp;
+    let r =
+      Fun.protect (fun () -> input_lines inp) ~finally:(fun () -> close_in inp)
+    in
     List.hd r
   in
   let modversion =