diff --git a/test/shaping/hb_test_tools.py b/test/shaping/hb_test_tools.py
index 0b1ec00ee4a14c2af6ecd0674001f1d71d89d341..6139ec10961a400eb79ece1e5c0a476fd6fa2fcd 100644
--- a/test/shaping/hb_test_tools.py
+++ b/test/shaping/hb_test_tools.py
@@ -299,6 +299,7 @@ class DiffHelpers:
 		if any (l.find("uni25CC") >= 0 for l in lines if l[0] == '+'): return True
 		if any (l.find("dottedcircle") >= 0 for l in lines if l[0] == '+'): return True
 		if any (l.find("glyph0") >= 0 for l in lines if l[0] == '+'): return True
+		if any (l.find("gid0") >= 0 for l in lines if l[0] == '+'): return True
 		if any (l.find("notdef") >= 0 for l in lines if l[0] == '+'): return True
 		return all (l[0] == ' ' for l in lines)