diff --git a/nixos/tests/proxy.nix b/nixos/tests/proxy.nix
index b43ce1b8e68..3fee1d32538 100644
--- a/nixos/tests/proxy.nix
+++ b/nixos/tests/proxy.nix
@@ -67,6 +67,7 @@ in
       $proxy->waitForUnit("httpd");
       $backend1->waitForUnit("httpd");
       $backend2->waitForUnit("httpd");
+      $client->waitForUnit("network.target");
 
       # With the back-ends up, the proxy should work.
       $client->succeed("curl --fail http://proxy/");