* tests/test-mbsncasecmp.c (test_ascii): Add the tests.
---
 ChangeLog                | 5 +++++
 tests/test-mbsncasecmp.c | 4 ++++
 2 files changed, 9 insertions(+)

diff --git a/ChangeLog b/ChangeLog
index 6abe6de135..7aa7cd8d5a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2026-07-31  Lasse Collin  <[email protected]>
+
+       mbsncasecmp-tests: Test mbsncasecmp with NULL arguments.
+       * tests/test-mbsncasecmp.c (test_ascii): Add the tests.
+
 2026-07-31  Lasse Collin  <[email protected]>
 
        mbsnlen-tests: Test mbsnlen(NULL, 0)
diff --git a/tests/test-mbsncasecmp.c b/tests/test-mbsncasecmp.c
index fb98f01354..2f0532d5c2 100644
--- a/tests/test-mbsncasecmp.c
+++ b/tests/test-mbsncasecmp.c
@@ -27,6 +27,10 @@
 static void
 test_ascii (void)
 {
+  ASSERT (mbsncasecmp (NULL, NULL, 0) == 0);
+  ASSERT (mbsncasecmp ("x", NULL, 0) == 0);
+  ASSERT (mbsncasecmp (NULL, "x", 0) == 0);
+
   ASSERT (mbsncasecmp ("paragraph", "Paragraph", 1000000) == 0);
   ASSERT (mbsncasecmp ("paragraph", "Paragraph", 9) == 0);
 
-- 
2.55.0


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