diff --git a/pkgs/applications/networking/instant-messengers/signal-desktop/default.nix b/pkgs/applications/networking/instant-messengers/signal-desktop/default.nix
index 2c781d7dd49e..be9cdbecc0bf 100644
--- a/pkgs/applications/networking/instant-messengers/signal-desktop/default.nix
+++ b/pkgs/applications/networking/instant-messengers/signal-desktop/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, autoPatchelfHook, dpkg, wrapGAppsHook
+{ stdenv, lib, fetchurl, autoPatchelfHook, dpkg, wrapGAppsHook, nixosTests
 , gnome2, gtk3, atk, at-spi2-atk, cairo, pango, gdk-pixbuf, glib, freetype, fontconfig
 , dbus, libX11, xorg, libXi, libXcursor, libXdamage, libXrandr, libXcomposite
 , libXext, libXfixes, libXrender, libXtst, libXScrnSaver, nss, nspr, alsaLib
@@ -23,7 +23,7 @@ let
       else "");
 in stdenv.mkDerivation rec {
   pname = "signal-desktop";
-  version = "1.33.4"; # Please backport all updates to the stable channel.
+  version = "1.34.0"; # Please backport all updates to the stable channel.
   # All releases have a limited lifetime and "expire" 90 days after the release.
   # When releases "expire" the application becomes unusable until an update is
   # applied. The expiration date for the current release can be extracted with:
@@ -33,7 +33,7 @@ in stdenv.mkDerivation rec {
 
   src = fetchurl {
     url = "https://updates.signal.org/desktop/apt/pool/main/s/signal-desktop/signal-desktop_${version}_amd64.deb";
-    sha256 = "0mcxia2zaflaazfdl1ngpab0dyhwwzbhad7brc6kwhjxydbnmwcd";
+    sha256 = "175iir85qlign5ns8wk4x4mf7xw8sriq8jyj61n76is79jjk7b3d";
   };
 
   nativeBuildInputs = [
@@ -121,6 +121,9 @@ in stdenv.mkDerivation rec {
     autoPatchelf --no-recurse -- $out/lib/Signal/
   '';
 
+  # Tests if the application launches and waits for "Link your phone to Signal Desktop":
+  passthru.tests.application-launch = nixosTests.signal-desktop;
+
   meta = {
     description = "Private, simple, and secure messenger";
     longDescription = ''