diff --git a/test/api/test-ot-metrics-tt-var.c b/test/api/test-ot-metrics-tt-var.c
index cffdeb764..48c575aa4 100644
--- a/test/api/test-ot-metrics-tt-var.c
+++ b/test/api/test-ot-metrics-tt-var.c
@@ -55,7 +55,7 @@ test_extents_tt_var (void)
 
   g_assert_cmpint (extents.x_bearing, ==, 0);
   g_assert_cmpint (extents.y_bearing, ==, 874);
-  g_assert_cmpint (extents.width, ==, 551);
+  g_assert_cmpint (extents.width, ==, 550);
   g_assert_cmpint (extents.height, ==, -874);
 
   hb_font_destroy (font);