diff --git a/libcxx/test/libcxx/transitive_includes/cxx26.csv b/libcxx/test/libcxx/transitive_includes/cxx26.csv
--- a/libcxx/test/libcxx/transitive_includes/cxx26.csv
+++ b/libcxx/test/libcxx/transitive_includes/cxx26.csv
@@ -3,6 +3,7 @@
 algorithm cstdint
 algorithm cstring
 algorithm ctime
+algorithm cwchar
 algorithm execution
 algorithm initializer_list
 algorithm iosfwd
@@ -128,11 +129,13 @@
 ctgmath ccomplex
 ctgmath cmath
 cwchar cwctype
+cwchar cstddef
 cwctype cctype
 deque compare
 deque cstddef
 deque cstdint
 deque cstring
+deque cwchar
 deque initializer_list
 deque limits
 deque new
@@ -442,6 +445,7 @@
 random version
 ranges compare
 ranges cstddef
+ranges cwchar
 ranges initializer_list
 ranges iosfwd
 ranges iterator
@@ -640,6 +644,7 @@
 vector cstdint
 vector cstdlib
 vector cstring
+vector cwchar
 vector initializer_list
 vector iosfwd
 vector limits