diff --git a/tests/unistd_test.cpp b/tests/unistd_test.cpp
index a81f112..8dbcd4a 100644
--- a/tests/unistd_test.cpp
+++ b/tests/unistd_test.cpp
@@ -1372,3 +1372,10 @@
   ASSERT_EXIT(execve("/system/bin/run-as", args, envs), testing::ExitedWithCode(1),
               "<unknown>: usage: run-as");
 }
+
+TEST(UNISTD_TEST, getlogin_r) {
+  char buf[LOGIN_NAME_MAX] = {};
+  EXPECT_EQ(ERANGE, getlogin_r(buf, 0));
+  EXPECT_EQ(0, getlogin_r(buf, sizeof(buf)));
+  EXPECT_STREQ(getlogin(), buf);
+}