diff --git a/src/libvterm/t/harness.c b/src/libvterm/t/harness.c
index e28bb7d..8bbd8cf 100644
--- a/src/libvterm/t/harness.c
+++ b/src/libvterm/t/harness.c
@@ -483,6 +483,9 @@
     if(streq(line, "INIT")) {
       if(!vt)
         vt = vterm_new(25, 80);
+
+      // Somehow this makes tests fail
+      // vterm_output_set_callback(vt, term_output, NULL);
     }
 
     else if(streq(line, "WANTPARSER")) {