diff --git a/pkgs/applications/misc/keepassx/community.nix b/pkgs/applications/misc/keepassx/community.nix
index 7d53dbb3f1f1..1dbc4f640887 100644
--- a/pkgs/applications/misc/keepassx/community.nix
+++ b/pkgs/applications/misc/keepassx/community.nix
@@ -69,7 +69,8 @@ stdenv.mkDerivation rec {
   doCheck = true;
   checkPhase = ''
     export LC_ALL="en_US.UTF-8"
-	export QT_PLUGIN_PATH="${qtbase.bin}/${qtbase.qtPluginPrefix}"
+    export QT_PLUGIN_PATH="${qtbase.bin}/${qtbase.qtPluginPrefix}"
+    export QT_QPA_PLATFORM=offscreen
     make test ARGS+="-E testgui --output-on-failure"
   '';