diff --git a/tests/unistd_test.cpp b/tests/unistd_test.cpp
index 1f7f555..da083de 100644
--- a/tests/unistd_test.cpp
+++ b/tests/unistd_test.cpp
@@ -886,6 +886,8 @@
   VerifySysconf(_SC_XOPEN_VERSION, "_SC_XOPEN_VERSION", [](long v){return v == _XOPEN_VERSION && errno == 0;});
   VERIFY_SYSCONF_POSITIVE(_SC_ATEXIT_MAX);
   VERIFY_SYSCONF_POSITIVE(_SC_IOV_MAX);
+  VERIFY_SYSCONF_POSITIVE(_SC_UIO_MAXIOV);
+  EXPECT_EQ(sysconf(_SC_IOV_MAX), sysconf(_SC_UIO_MAXIOV));
   VERIFY_SYSCONF_POSITIVE(_SC_PAGESIZE);
   VERIFY_SYSCONF_POSITIVE(_SC_PAGE_SIZE);
   VerifySysconf(_SC_PAGE_SIZE, "_SC_PAGE_SIZE",