diff --git a/nixos/lib/test-driver/Machine.pm b/nixos/lib/test-driver/Machine.pm
index 14c39e859bc..85bc376f67f 100644
--- a/nixos/lib/test-driver/Machine.pm
+++ b/nixos/lib/test-driver/Machine.pm
@@ -508,7 +508,7 @@ sub screenshot {
 sub getTTYText {
     my ($self, $tty) = @_;
 
-    my ($status, $out) = $self->execute("fold -w 80 /dev/vcs${tty}");
+    my ($status, $out) = $self->execute("fold -w\$(stty -F /dev/tty${tty} size | awk '{print \$2}') /dev/vcs${tty}");
     return $out;
 }