diff --git a/opensuse-test.patch b/opensuse-test.patch
new file mode 100644
index 0000000..429fd58
--- /dev/null
+++ b/opensuse-test.patch
@@ -0,0 +1,34 @@
+---
+ tests/test_ansi2html.py |    5 +++--
+ 1 file changed, 3 insertions(+), 2 deletions(-)
+
+Index: ansi2html-1.9.2/tests/test_ansi2html.py
+===================================================================
+--- ansi2html-1.9.2.orig/tests/test_ansi2html.py	2024-06-22 19:22:24.000000000 +0200
++++ ansi2html-1.9.2/tests/test_ansi2html.py	2025-06-17 22:27:11.354092953 +0200
+@@ -50,6 +50,7 @@
+ 
+ class TestAnsi2HTML:
+     maxDiff = None
++    cmd_exe = "ansi2html-" + '.'.join([str(x) for x in sys.version_info[:2]])
+ 
+     def test_linkify(self) -> None:
+         ansi = "http://threebean.org#foobar"
+@@ -465,7 +466,7 @@
+         assert target in html
+ 
+     def test_command_script(self) -> None:
+-        result = run(["ansi2html", "--version"], check=True)
++        result = run([self.cmd_exe, "--version"], check=True)
+         assert result.returncode == 0
+ 
+     def test_command_input_output_encoding(self) -> None:
+@@ -480,7 +481,7 @@
+ 
+         with Popen(
+             [
+-                "ansi2html",
++                self.cmd_exe,
+                 "--inline",
+                 f"--input-encoding={input_encoding}",
+                 f"--output-encoding={output_encoding}",
diff --git a/python-ansi2html.changes b/python-ansi2html.changes
index 5d5e6cd..e2176a8 100644
--- a/python-ansi2html.changes
+++ b/python-ansi2html.changes
@@ -1,3 +1,15 @@
+-------------------------------------------------------------------
+Tue Jun 17 20:29:28 UTC 2025 - Matej Cepl <mcepl@cepl.eu>
+
+- Add opensuse-test.patch making the tests work even with
+  versioned executables in the testing environment (i.e., before
+  the alts scriptlets kick in).
+
+-------------------------------------------------------------------
+Mon Jun 16 12:20:51 UTC 2025 - Markéta Machová <mmachova@suse.com>
+
+- Convert to libalternatives
+
 -------------------------------------------------------------------
 Sun Jun 23 07:43:43 UTC 2024 - Johannes Kastl <opensuse_buildservice@ojkastl.de>
 
diff --git a/python-ansi2html.spec b/python-ansi2html.spec
index a69fb97..10a54ac 100644
--- a/python-ansi2html.spec
+++ b/python-ansi2html.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package python-ansi2html
 #
-# Copyright (c) 2024 SUSE LLC
+# Copyright (c) 2025 SUSE LLC
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -16,6 +16,7 @@
 #
 
 
+%bcond_without libalternatives
 %{?sle15_python_module_pythons}
 Name:           python-ansi2html
 Version:        1.9.2
@@ -25,14 +26,19 @@ License:        LGPL-3.0-or-later
 Group:          Development/Languages/Python
 URL:            https://github.com/pycontribs/ansi2html/
 Source:         https://github.com/pycontribs/ansi2html/archive/v%{version}.tar.gz
+# PATCH-FIX-OPENSUSE opensuse-test.patch bsc#[0-9]+ mcepl@suse.com
+# Make tests work with versioned executables before alts kick in
+# If any other test fails, because the executable is not
+# "ansi2html", replace it with self.cmd_exe
+Patch0:         opensuse-test.patch
 BuildRequires:  %{python_module pip}
 BuildRequires:  %{python_module pytest}
 BuildRequires:  %{python_module setuptools}
 BuildRequires:  %{python_module wheel}
+BuildRequires:  alts
 BuildRequires:  fdupes
 BuildRequires:  python-rpm-macros
-Requires(post): update-alternatives
-Requires(postun): update-alternatives
+Requires:       alts
 BuildArch:      noarch
 %python_subpackages
 
@@ -44,7 +50,7 @@ Inspired by and developed off of the work of pixelbeat and blackjack.
 Read the [docs](https://ansi2html.readthedocs.io/) for more informations.
 
 %prep
-%setup -q -n ansi2html-%{version}
+%autosetup -p1 -n ansi2html-%{version}
 
 %build
 %pyproject_wheel
@@ -57,15 +63,13 @@ Read the [docs](https://ansi2html.readthedocs.io/) for more informations.
 %check
 # https://github.com/pycontribs/ansi2html/issues/169
 sed -i 's:from mock:from unittest.mock:' tests/test_ansi2html.py
+export PATH=$PATH:%{buildroot}%{_bindir}
 # ansi2html not available (update alternatives); solvable
 # but it runs just ansi2html --version
-%pytest -k 'not test_command_script'
+%pytest
 
-%post
-%python_install_alternative ansi2html
-
-%postun
-%python_uninstall_alternative ansi2html
+%pre
+%python_libalternatives_reset_alternative ansi2html
 
 %files %{python_files}
 %license LICENSE