diff --git a/src/test-meta.cc b/src/test-meta.cc
index 716e99cd7..6fb8e4f19 100644
--- a/src/test-meta.cc
+++ b/src/test-meta.cc
@@ -80,19 +80,19 @@ main (int argc, char **argv)
 
   struct Y : X {};
 
-  static_assert (hb_is_base_of (void, void));
-  static_assert (hb_is_base_of (void, int));
-  static_assert (!hb_is_base_of (int, void));
+  static_assert (hb_is_base_of (void, void), "");
+  static_assert (hb_is_base_of (void, int), "");
+  static_assert (!hb_is_base_of (int, void), "");
 
-  static_assert (hb_is_base_of (int, int));
-  static_assert (hb_is_base_of (const int, int));
-  static_assert (hb_is_base_of (int, const int));
+  static_assert (hb_is_base_of (int, int), "");
+  static_assert (hb_is_base_of (const int, int), "");
+  static_assert (hb_is_base_of (int, const int), "");
 
-  static_assert (hb_is_base_of (X, X));
-  static_assert (hb_is_base_of (X, Y));
-  static_assert (hb_is_base_of (const X, Y));
-  static_assert (hb_is_base_of (X, const Y));
-  static_assert (!hb_is_base_of (Y, X));
+  static_assert (hb_is_base_of (X, X), "");
+  static_assert (hb_is_base_of (X, Y), "");
+  static_assert (hb_is_base_of (const X, Y), "");
+  static_assert (hb_is_base_of (X, const Y), "");
+  static_assert (!hb_is_base_of (Y, X), "");
 
   return 0;
 }