fix build attempt ^3
diff --git a/test/api/test-subset-cff2.c b/test/api/test-subset-cff2.c
index a909b73..dafb32b 100644
--- a/test/api/test-subset-cff2.c
+++ b/test/api/test-subset-cff2.c
@@ -25,6 +25,7 @@
  */
 
 #include "hb-test.h"
+#include "hb-subset-test.h"
 
 /* Unit tests for CFF2 subsetting */