diff --git a/nixos/lib/test-driver/test-driver.pl b/nixos/lib/test-driver/test-driver.pl
index 31f3281cefe..358c29e515f 100644
--- a/nixos/lib/test-driver/test-driver.pl
+++ b/nixos/lib/test-driver/test-driver.pl
@@ -147,7 +147,7 @@ sub runTests {
     $log->nest("syncing", sub {
         foreach my $vm (values %vms) {
             next unless $vm->isUp();
-            $vm->execute("sync /tmp/xchg");
+            $vm->execute("sync");
         }
     });