diff --git a/test/api/test-multithread.c b/test/api/test-multithread.c
index 116260bde..7e357fd51 100644
--- a/test/api/test-multithread.c
+++ b/test/api/test-multithread.c
@@ -70,7 +70,7 @@ validity_check (hb_buffer_t *buffer) {
 				out, sizeof (out), NULL,
 				font, HB_BUFFER_SERIALIZE_FORMAT_TEXT,
 				HB_BUFFER_SERIALIZE_FLAG_NO_GLYPH_NAMES);
-    fprintf (stderr, "Actual: %s\n", out);
+    fprintf (stderr, "Actual:   %s\n", out);
 
     hb_buffer_serialize_glyphs (ref_buffer, 0, hb_buffer_get_length (ref_buffer),
 				out, sizeof (out), NULL,