diff --git a/pkgs/development/ocaml-modules/pa_ounit/default.nix b/pkgs/development/ocaml-modules/pa_ounit/default.nix
deleted file mode 100644
index b007b241f375..000000000000
--- a/pkgs/development/ocaml-modules/pa_ounit/default.nix
+++ /dev/null
@@ -1,26 +0,0 @@
-{ lib, buildOcaml, ocaml, fetchFromGitHub, ounit }:
-
-if lib.versionAtLeast ocaml.version "4.06"
-then throw "pa_ounit is not available for OCaml ${ocaml.version}"
-else
-
-buildOcaml rec {
-  pname = "pa_ounit";
-  version = "113.00.00";
-
-  src = fetchFromGitHub {
-    owner = "janestreet";
-    repo = "pa_ounit";
-    rev = version;
-    sha256 = "sha256-zzXN+mSJtlnQ3e1QoEukCiyfDEoe8cBdkAQ3U1dkvEk=";
-  };
-
-  propagatedBuildInputs = [ ounit ];
-
-  meta = with lib; {
-    homepage = "https://github.com/janestreet/pa_ounit";
-    description = "OCaml inline testing";
-    license = licenses.asl20;
-    maintainers = [ maintainers.ericbmerritt ];
-  };
-}
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index 9724056a10cc..b80eb3f0e559 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -1126,8 +1126,6 @@ let
 
     ocurl = callPackage ../development/ocaml-modules/ocurl { };
 
-    pa_ounit = callPackage ../development/ocaml-modules/pa_ounit { };
-
     parany = callPackage ../development/ocaml-modules/parany { };
 
     pipebang = callPackage ../development/ocaml-modules/pipebang { };