diff --git a/app-emacs/buttercup/Manifest b/app-emacs/buttercup/Manifest
index c7ae37e4d261c..cd2180358ff43 100644
--- a/app-emacs/buttercup/Manifest
+++ b/app-emacs/buttercup/Manifest
@@ -1 +1,2 @@
 DIST buttercup-1.38.gh.tar.gz 95260 BLAKE2B 1973f47741496c450e3535c8c35229288bd3a5d7643b3a178161e13522d2ee5eeadafa3aa010eeb0835c2c0b5179f77ee718946ed7d2094ee077bada374d10e5 SHA512 fbce8628ed5a7a6cb04bbf95229c09093e72559ea47b9c2d7706f2f3f73643e391e2b7d6b66bcf15c866e82de0d322fa5f13f67f0ddb778b369b3b0021ab5eb4
+DIST buttercup-1.39.gh.tar.gz 95847 BLAKE2B f1127c33a987167841132e7060aadecb66944237a8d45874cd3288a810936c961dc46031404eb5d9bb3bbd22a6a2ef90615b648e270ae2cec1fb76798a27edc5 SHA512 a6a81e0a7a30f76c6fb59f6f47b43316e270507d4e5487d00616bf02c8f5f78b9327ea1e2435f38d66cca629b6d3d0e3aca385962fdd590877e3dd4e0ad90478
diff --git a/app-emacs/buttercup/buttercup-1.39.ebuild b/app-emacs/buttercup/buttercup-1.39.ebuild
new file mode 100644
index 0000000000000..2542afb62b018
--- /dev/null
+++ b/app-emacs/buttercup/buttercup-1.39.ebuild
@@ -0,0 +1,36 @@
+# Copyright 2022-2026 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit elisp edo
+
+DESCRIPTION="Behaviour-driven Elisp testing"
+HOMEPAGE="https://github.com/jorgenschaefer/emacs-buttercup/"
+
+if [[ "${PV}" == *9999* ]] ; then
+	inherit git-r3
+
+	EGIT_REPO_URI="https://github.com/jorgenschaefer/emacs-${PN}"
+else
+	SRC_URI="https://github.com/jorgenschaefer/emacs-${PN}/archive/v${PV}.tar.gz
+		-> ${P}.gh.tar.gz"
+	S="${WORKDIR}/emacs-${P}"
+
+	KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~loong ~ppc ~ppc64 ~riscv ~sparc ~x86"
+fi
+
+LICENSE="GPL-3+"
+SLOT="0"
+
+DOCS=( docs/{running,writing}-tests.md  )
+SITEFILE="50${PN}-gentoo.el"
+
+src_test() {
+	edo ${EMACS} ${EMACSFLAGS} -L . -l buttercup -f buttercup-run-discover
+}
+
+src_install() {
+	elisp_src_install
+	dobin "bin/${PN}"
+}