diff --git a/containers-data.opam b/containers-data.opam
index a66b0802..bc3be037 100644
--- a/containers-data.opam
+++ b/containers-data.opam
@@ -15,7 +15,6 @@ depends: [
   "containers" { = version }
   "seq"
   "qcheck-core" { with-test }
-  "ounit" { with-test }
   "iter" { with-test }
   "gen" { with-test }
   #"mdx" { with-test & >= "1.5.0" & < "2.0.0" }
diff --git a/containers-thread.opam b/containers-thread.opam
index 2fdb8034..56acb973 100644
--- a/containers-thread.opam
+++ b/containers-thread.opam
@@ -17,7 +17,6 @@ depends: [
   "containers" { = version }
   "iter" { with-test }
   "qcheck-core" { with-test }
-  "ounit" { with-test }
   "uutf" { with-test }
   "odoc" { with-doc }
 ]
diff --git a/src/core/CCVector.ml b/src/core/CCVector.ml
index 07ccf4da..28c24d4d 100644
--- a/src/core/CCVector.ml
+++ b/src/core/CCVector.ml
@@ -143,9 +143,9 @@ let clear_and_reset v =
   push v ("hello"^"world");
   Weak.set a 0 (Some (get v 0));
   Gc.full_major(); Gc.compact();
-  OUnit2.assert_bool "is alive" (Weak.check a 0);
+  assert_bool "is alive" (Weak.check a 0);
   Gc.full_major(); Gc.compact();
-  OUnit2.assert_equal None (Weak.get a 0);
+  assert_equal None (Weak.get a 0);
 *)
 
 let[@inline] is_empty v = v.size = 0
diff --git a/src/data/CCMixtbl.mli b/src/data/CCMixtbl.mli
index 25fecddc..7019542f 100644
--- a/src/data/CCMixtbl.mli
+++ b/src/data/CCMixtbl.mli
@@ -11,23 +11,23 @@
 
       let tbl = CCMixtbl.create 10 ;;
 
-      OUnit2.assert_equal None (CCMixtbl.get ~inj:inj_int tbl "a");;
+      assert_equal None (CCMixtbl.get ~inj:inj_int tbl "a");;
 
       CCMixtbl.set inj_int tbl "a" 1;;
 
-      OUnit2.assert_equal (Some 1) (CCMixtbl.get ~inj:inj_int tbl "a");;
+      assert_equal (Some 1) (CCMixtbl.get ~inj:inj_int tbl "a");;
 
       let inj_string = CCMixtbl.create_inj () ;;
 
       CCMixtbl.set inj_string tbl "b" "Hello";
 
-      OUnit2.assert_equal (Some "Hello") (CCMixtbl.get inj_string tbl "b");;
-      OUnit2.assert_equal None (CCMixtbl.get inj_string tbl "a");;
-      OUnit2.assert_equal (Some 1) (CCMixtbl.get inj_int tbl "a");;
+      assert_equal (Some "Hello") (CCMixtbl.get inj_string tbl "b");;
+      assert_equal None (CCMixtbl.get inj_string tbl "a");;
+      assert_equal (Some 1) (CCMixtbl.get inj_int tbl "a");;
       CCMixtbl.set inj_string tbl "a" "Bye";;
 
-      OUnit2.assert_equal None (CCMixtbl.get inj_int tbl "a");;
-      OUnit2.assert_equal (Some "Bye") (CCMixtbl.get inj_string tbl "a");;
+      assert_equal None (CCMixtbl.get inj_int tbl "a");;
+      assert_equal (Some "Bye") (CCMixtbl.get inj_string tbl "a");;
     ]}
 
     @since 0.6 *)