diff --git a/gnu/installer/final.scm b/gnu/installer/final.scm
index 90c76e9d5f..e06b104d59 100644
--- a/gnu/installer/final.scm
+++ b/gnu/installer/final.scm
@@ -205,7 +205,18 @@ (define* (install-system locale #:key (users '()))
       (lambda ()
         (start-service 'cow-store (list (%installer-target-dir))))
       (lambda ()
-        (run-command install-command #:locale locale))
+        ;; If there are any connected clients, assume that we are running
+        ;; installation tests. In that case, dump the standard and error
+        ;; outputs to syslog.
+        (if (not (null? (current-clients)))
+            (with-output-to-file "/dev/console"
+              (lambda ()
+                (with-error-to-file "/dev/console"
+                  (lambda ()
+                    (setvbuf (current-output-port) 'none)
+                    (setvbuf (current-error-port) 'none)
+                    (run-command install-command #:locale locale)))))
+            (run-command install-command #:locale locale)))
       (lambda ()
         (stop-service 'cow-store)
         ;; Remove the store overlay created at cow-store service start.