diff --git a/Provide-native-lib-for-libsignal.md b/Provide-native-lib-for-libsignal.md
index 175382b..514fe4f 100644
--- a/Provide-native-lib-for-libsignal.md
+++ b/Provide-native-lib-for-libsignal.md
@@ -13,6 +13,12 @@ Builds for some additional platforms are available in
 * https://media.projektzentrisch.de/temp/signal-cli/
   * **Linux:** amd64/x86_64, arm64/aarch64, armv7, i686, loong64, mips64el, mipsel, powerpc, ppc64, ppc64el, riscv64, s390x, sparc64
     * _all artefacts require `glibc` v2.29 (riscv64: v2.28; loong64: v2.36) or newer_
+* [https://media.projektzentrisch.de/temp/signal-cli/**tests**/](https://media.projektzentrisch.de/temp/signal-cli/tests/)
+  * This directory contains artefacts cross-built against header files and libraries of previous, still supported Ubuntu LTS releases:
+    * `libsignal_jni_soNNNN_ubuntu1804_{powerpc,ppc64,ppc64el,riscv64}.gz` _(these require `glibc` v2.27)_
+    * `libsignal_jni_soNNNN_ubuntu1804_{amd64,i686,arm64,armv7,mips64el,mipsel,s390x,sparc64}.gz` _(these require `glibc` v2.25)_
+    * `libsignal_jni_soNNNN_ubuntu1604_{ppc64,ppc64el}.gz` _(these require `glibc` v2.22)_
+    * `libsignal_jni_soNNNN_ubuntu1604_{arm64,armv7,mips64el,mipsel,powerpc,s390x,sparc64}.gz` _(these require `glibc` v2.18)_
 
 ## Manual build