diff --git a/testing/libosmium/APKBUILD b/testing/libosmium/APKBUILD
new file mode 100644
index 0000000000000000000000000000000000000000..1156be59bff236885ce3817f5f721f2220af4d65
--- /dev/null
+++ b/testing/libosmium/APKBUILD
@@ -0,0 +1,34 @@
+# Contributor: Sascha Brawer <sascha@brawer.ch>
+# Maintainer: Sascha Brawer <sascha@brawer.ch>
+pkgname=libosmium
+pkgver=2.18.0
+pkgrel=0
+pkgdesc="Fast and flexible C++ library for working with OpenStreetMap data"
+url="https://github.com/osmcode/libosmium"
+arch="noarch"
+license="BSL-1.0"
+checkdepends="boost-dev bzip2-dev gdal-dev geos-dev expat-dev lz4-dev protozero-dev zlib-dev"
+makedepends="cmake samurai"
+subpackages="$pkgname-dev"
+source="libosmium-$pkgver.tar.gz::https://github.com/osmcode/libosmium/archive/refs/tags/v$pkgver.tar.gz
+fix-bzip2-test.patch"
+
+build() {
+	cmake -B build -G Ninja \
+		-DCMAKE_INSTALL_PREFIX=/usr \
+		-DBUILD_TESTING="$(want_check && echo ON || echo OFF)"
+	cmake --build build
+}
+
+check() {
+	ctest -output-on-failure --test-dir build
+}
+
+package() {
+	DESTDIR="$pkgdir" cmake --install build
+}
+
+sha512sums="
+bfe4d5b08e284abb21280205437c62d260948c8585cc8d10f0c3496fd29df1ff6c6bc436283207f292d6a8af911835ebef64403c3fde2a262b55fde5296c13ce  libosmium-2.18.0.tar.gz
+844f523403a94f1e3acad9a923686b989b6490e55b1698038695a4eaf55cdf1d48f3e6870977c7b687b3a2000924d6154d84a210c1ead45c5beac84552134e2e  fix-bzip2-test.patch
+"
diff --git a/testing/libosmium/fix-bzip2-test.patch b/testing/libosmium/fix-bzip2-test.patch
new file mode 100644
index 0000000000000000000000000000000000000000..868f1add2d57d92571c035a3bb5a82e088f9b4e8
--- /dev/null
+++ b/testing/libosmium/fix-bzip2-test.patch
@@ -0,0 +1,55 @@
+Make bzip2 unit tests pass on musl-based systems
+
+https://github.com/osmcode/libosmium/issues/353
+
+https://github.com/osmcode/libosmium/commit/dcb34b53e34d449edb5578f070a3da9975d7534b
+
+Committed to upstream main branch, but not yet in any release.
+In future releases after libosmum 2.18.0, this patch can be removed.
+
+--- libosmium-2.18.0/test/t/io/test_bzip2.cpp.orig
++++ libosmium-2.18.0/test/t/io/test_bzip2.cpp
+@@ -7,13 +7,19 @@
+ 
+ #include <string>
+ 
++static void read_from_decompressor(int fd) {
++    osmium::io::Bzip2Decompressor decomp{fd};
++    decomp.read();
++    decomp.close();
++}
++
+ TEST_CASE("Invalid file descriptor of bzip2-compressed file") {
+-    REQUIRE_THROWS_AS(osmium::io::Bzip2Decompressor{-1}, std::system_error);
++    REQUIRE_THROWS(read_from_decompressor(-1));
+ }
+ 
+ TEST_CASE("Non-open file descriptor of bzip2-compressed file") {
+     // 12345 is just a random file descriptor that should not be open
+-    REQUIRE_THROWS_AS(osmium::io::Bzip2Decompressor{12345}, std::system_error);
++    REQUIRE_THROWS(read_from_decompressor(12345));
+ }
+ 
+ TEST_CASE("Empty bzip2-compressed file") {
+@@ -93,13 +99,19 @@
+     REQUIRE(count == count_fds());
+ }
+ 
++static void write_to_compressor(int fd) {
++    osmium::io::Bzip2Compressor comp{fd, osmium::io::fsync::yes};
++    comp.write("foo");
++    comp.close();
++}
++
+ TEST_CASE("Compressor: Invalid file descriptor for bzip2-compressed file") {
+-    REQUIRE_THROWS_AS(osmium::io::Bzip2Compressor(-1, osmium::io::fsync::yes), std::system_error);
++    REQUIRE_THROWS(write_to_compressor(-1));
+ }
+ 
+ TEST_CASE("Compressor: Non-open file descriptor for bzip2-compressed file") {
+     // 12345 is just a random file descriptor that should not be open
+-    REQUIRE_THROWS_AS(osmium::io::Bzip2Compressor(12345, osmium::io::fsync::yes), std::system_error);
++    REQUIRE_THROWS(write_to_compressor(12345));
+ }
+ 
+ TEST_CASE("Write bzip2-compressed file with explicit close") {