diff --git a/devel/ocaml-expect_test_helpers_core/DESCR b/devel/ocaml-expect_test_helpers_core/DESCR
new file mode 100644
index 000000000000..723d95b76002
--- /dev/null
+++ b/devel/ocaml-expect_test_helpers_core/DESCR
@@ -0,0 +1,3 @@
+Expect_test_helpers_core is a library intended for use with expect tests,
+in particular stable types and allocation tests that use the Core.Gc
+module.
diff --git a/devel/ocaml-expect_test_helpers_core/Makefile b/devel/ocaml-expect_test_helpers_core/Makefile
new file mode 100644
index 000000000000..37f95c9ecca7
--- /dev/null
+++ b/devel/ocaml-expect_test_helpers_core/Makefile
@@ -0,0 +1,27 @@
+# $NetBSD: Makefile,v 1.1 2022/05/05 08:53:02 jaapb Exp $
+
+DISTNAME=	${GITHUB_PROJECT}-0.15.0
+PKGNAME=	ocaml-${DISTNAME}
+CATEGORIES=	devel
+MASTER_SITES=	${MASTER_SITE_GITHUB:=janestreet/}
+GITHUB_PROJECT=	expect_test_helpers_core
+GITHUB_TAG=	v${PKGVERSION_NOREV}
+
+MAINTAINER=	jaapb@NetBSD.org
+HOMEPAGE=	https://github.com/janestreet/expect_test_helpers_core/
+COMMENT=	Helper library for writing expectation tests
+LICENSE=	mit
+
+USE_LANGUAGES=	# none
+
+OCAML_USE_DUNE=	yes
+
+.include "../../mk/ocaml.mk"
+.include "../../devel/ocaml-base/buildlink3.mk"
+.include "../../devel/ocaml-base_quickcheck/buildlink3.mk"
+.include "../../devel/ocaml-core/buildlink3.mk"
+.include "../../devel/ocaml-ppx_jane/buildlink3.mk"
+.include "../../devel/ocaml-sexp_pretty/buildlink3.mk"
+.include "../../devel/ocaml-stdio/buildlink3.mk"
+.include "../../devel/ocaml-re/buildlink3.mk"
+.include "../../mk/bsd.pkg.mk"
diff --git a/devel/ocaml-expect_test_helpers_core/PLIST b/devel/ocaml-expect_test_helpers_core/PLIST
new file mode 100644
index 000000000000..822448e52ba1
--- /dev/null
+++ b/devel/ocaml-expect_test_helpers_core/PLIST
@@ -0,0 +1,43 @@
+@comment $NetBSD: PLIST,v 1.1 2022/05/05 08:53:02 jaapb Exp $
+${OCAML_SITELIB}/expect_test_helpers_core/META
+${OCAML_SITELIB}/expect_test_helpers_core/dune-package
+${PLIST.ocaml-opt}${OCAML_SITELIB}/expect_test_helpers_core/expect_test_helpers_base/expect_test_helpers_base.a
+${OCAML_SITELIB}/expect_test_helpers_core/expect_test_helpers_base/expect_test_helpers_base.cma
+${OCAML_SITELIB}/expect_test_helpers_core/expect_test_helpers_base/expect_test_helpers_base.cmi
+${OCAML_SITELIB}/expect_test_helpers_core/expect_test_helpers_base/expect_test_helpers_base.cmt
+${OCAML_SITELIB}/expect_test_helpers_core/expect_test_helpers_base/expect_test_helpers_base.cmti
+${PLIST.ocaml-opt}${OCAML_SITELIB}/expect_test_helpers_core/expect_test_helpers_base/expect_test_helpers_base.cmx
+${PLIST.ocaml-opt}${OCAML_SITELIB}/expect_test_helpers_core/expect_test_helpers_base/expect_test_helpers_base.cmxa
+${PLIST.ocaml-opt}${OCAML_SITELIB}/expect_test_helpers_core/expect_test_helpers_base/expect_test_helpers_base.cmxs
+${OCAML_SITELIB}/expect_test_helpers_core/expect_test_helpers_base/expect_test_helpers_base.ml
+${OCAML_SITELIB}/expect_test_helpers_core/expect_test_helpers_base/expect_test_helpers_base.mli
+${OCAML_SITELIB}/expect_test_helpers_core/expect_test_helpers_base/expect_test_helpers_base__.cmi
+${OCAML_SITELIB}/expect_test_helpers_core/expect_test_helpers_base/expect_test_helpers_base__.cmt
+${PLIST.ocaml-opt}${OCAML_SITELIB}/expect_test_helpers_core/expect_test_helpers_base/expect_test_helpers_base__.cmx
+${OCAML_SITELIB}/expect_test_helpers_core/expect_test_helpers_base/expect_test_helpers_base__.ml
+${OCAML_SITELIB}/expect_test_helpers_core/expect_test_helpers_base/expect_test_helpers_base__Expect_test_helpers_base_intf.cmi
+${OCAML_SITELIB}/expect_test_helpers_core/expect_test_helpers_base/expect_test_helpers_base__Expect_test_helpers_base_intf.cmt
+${PLIST.ocaml-opt}${OCAML_SITELIB}/expect_test_helpers_core/expect_test_helpers_base/expect_test_helpers_base__Expect_test_helpers_base_intf.cmx
+${OCAML_SITELIB}/expect_test_helpers_core/expect_test_helpers_base/expect_test_helpers_base_intf.ml
+${PLIST.ocaml-opt}${OCAML_SITELIB}/expect_test_helpers_core/expect_test_helpers_core.a
+${OCAML_SITELIB}/expect_test_helpers_core/expect_test_helpers_core.cma
+${OCAML_SITELIB}/expect_test_helpers_core/expect_test_helpers_core.cmi
+${OCAML_SITELIB}/expect_test_helpers_core/expect_test_helpers_core.cmt
+${OCAML_SITELIB}/expect_test_helpers_core/expect_test_helpers_core.cmti
+${PLIST.ocaml-opt}${OCAML_SITELIB}/expect_test_helpers_core/expect_test_helpers_core.cmx
+${PLIST.ocaml-opt}${OCAML_SITELIB}/expect_test_helpers_core/expect_test_helpers_core.cmxa
+${PLIST.ocaml-opt}${OCAML_SITELIB}/expect_test_helpers_core/expect_test_helpers_core.cmxs
+${OCAML_SITELIB}/expect_test_helpers_core/expect_test_helpers_core.ml
+${OCAML_SITELIB}/expect_test_helpers_core/expect_test_helpers_core.mli
+${OCAML_SITELIB}/expect_test_helpers_core/expect_test_helpers_core__.cmi
+${OCAML_SITELIB}/expect_test_helpers_core/expect_test_helpers_core__.cmt
+${PLIST.ocaml-opt}${OCAML_SITELIB}/expect_test_helpers_core/expect_test_helpers_core__.cmx
+${OCAML_SITELIB}/expect_test_helpers_core/expect_test_helpers_core__.ml
+${OCAML_SITELIB}/expect_test_helpers_core/expect_test_helpers_core__Expect_test_helpers_core_intf.cmi
+${OCAML_SITELIB}/expect_test_helpers_core/expect_test_helpers_core__Expect_test_helpers_core_intf.cmt
+${PLIST.ocaml-opt}${OCAML_SITELIB}/expect_test_helpers_core/expect_test_helpers_core__Expect_test_helpers_core_intf.cmx
+${OCAML_SITELIB}/expect_test_helpers_core/expect_test_helpers_core_intf.ml
+${OCAML_SITELIB}/expect_test_helpers_core/opam
+share/doc/expect_test_helpers_core/CHANGES.md
+share/doc/expect_test_helpers_core/LICENSE.md
+share/doc/expect_test_helpers_core/README.md
diff --git a/devel/ocaml-expect_test_helpers_core/buildlink3.mk b/devel/ocaml-expect_test_helpers_core/buildlink3.mk
new file mode 100644
index 000000000000..d8c8112d8df4
--- /dev/null
+++ b/devel/ocaml-expect_test_helpers_core/buildlink3.mk
@@ -0,0 +1,13 @@
+# $NetBSD: buildlink3.mk,v 1.1 2022/05/05 08:53:02 jaapb Exp $
+
+BUILDLINK_TREE+=	ocaml-expect_test_helpers_core
+
+.if !defined(OCAML_EXPECT_TEST_HELPERS_CORE_BUILDLINK3_MK)
+OCAML_EXPECT_TEST_HELPERS_CORE_BUILDLINK3_MK:=
+
+BUILDLINK_API_DEPENDS.ocaml-expect_test_helpers_core+=	ocaml-expect_test_helpers_core>=0.15.0
+BUILDLINK_PKGSRCDIR.ocaml-expect_test_helpers_core?=	../../devel/ocaml-expect_test_helpers_core
+
+.endif	# OCAML_EXPECT_TEST_HELPERS_CORE_BUILDLINK3_MK
+
+BUILDLINK_TREE+=	-ocaml-expect_test_helpers_core
diff --git a/devel/ocaml-expect_test_helpers_core/distinfo b/devel/ocaml-expect_test_helpers_core/distinfo
new file mode 100644
index 000000000000..939f8a85823e
--- /dev/null
+++ b/devel/ocaml-expect_test_helpers_core/distinfo
@@ -0,0 +1,5 @@
+$NetBSD: distinfo,v 1.1 2022/05/05 08:53:02 jaapb Exp $
+
+BLAKE2s (expect_test_helpers_core-0.15.0.tar.gz) = 07ebb1fe26e65265b536c43e83af7128bf1dd7bd258c0acca399b6e8a8e14812
+SHA512 (expect_test_helpers_core-0.15.0.tar.gz) = c08bda03c3bbc5c7ee1e970b5ba03e319826b7dd550d073f69b373bfa429c489ae1fcd388a2629f3d81729a96aac5614b4b1bcadd4040a290ffaab55b26bb9d6
+Size (expect_test_helpers_core-0.15.0.tar.gz) = 19807 bytes