[test] Unify font file opening across the tests
diff --git a/test/api/test-collect-unicodes.c b/test/api/test-collect-unicodes.c
index f7a7813..50965a9 100644
--- a/test/api/test-collect-unicodes.c
+++ b/test/api/test-collect-unicodes.c
@@ -30,7 +30,7 @@
 static void
 test_collect_unicodes_format4 (void)
 {
-  hb_face_t *face = hb_subset_test_open_font("fonts/Roboto-Regular.abc.format4.ttf");
+  hb_face_t *face = hb_test_open_font_file ("fonts/Roboto-Regular.abc.format4.ttf");
   hb_set_t *codepoints = hb_set_create();
   hb_codepoint_t cp;
 
@@ -52,7 +52,7 @@
 static void
 test_collect_unicodes_format12 (void)
 {
-  hb_face_t *face = hb_subset_test_open_font("fonts/Roboto-Regular.abc.format12.ttf");
+  hb_face_t *face = hb_test_open_font_file ("fonts/Roboto-Regular.abc.format12.ttf");
   hb_set_t *codepoints = hb_set_create();
   hb_codepoint_t cp;
 
@@ -74,7 +74,7 @@
 static void
 test_collect_unicodes (void)
 {
-  hb_face_t *face = hb_subset_test_open_font("fonts/Roboto-Regular.abc.ttf");
+  hb_face_t *face = hb_test_open_font_file ("fonts/Roboto-Regular.abc.ttf");
   hb_set_t *codepoints = hb_set_create();
   hb_codepoint_t cp;