diff --git a/ChangeLog b/ChangeLog
index d7df9b16aa..99b476be6e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,10 @@
 2022-09-08  Paul Eggert  <eggert@cs.ucla.edu>
 
+	stdbool-tests: match stdbool
+	* tests/test-stdbool.c: Omit test for
+	__bool_true_false_are_defined since AC_CHECK_HEADER_STDBOOL no
+	longer checks for this obsolescent macro.
+
 	mktime: back in sync with GNUlib
 	* config/srclist.txt: glibc has synced mktime from Gnulib.
 
diff --git a/tests/test-stdbool.c b/tests/test-stdbool.c
index 27fd16d010..329f5d5378 100644
--- a/tests/test-stdbool.c
+++ b/tests/test-stdbool.c
@@ -57,7 +57,6 @@ struct s { bool s: 1; bool t; } s;
 
 char a[true == 1 ? 1 : -1];
 char b[false == 0 ? 1 : -1];
-char c[__bool_true_false_are_defined == 1 ? 1 : -1];
 #if WORKING_BOOL
 char d[(bool) 0.5 == true ? 1 : -1];
 # ifdef ADDRESS_CHECK_OKAY /* Avoid gcc warning.  */