diff --git a/tests/tests.cpp b/tests/tests.cpp
index 5b328c72..2185599e 100644
--- a/tests/tests.cpp
+++ b/tests/tests.cpp
@@ -313,8 +313,8 @@ test_rmdir()
 
   root_fd = openat(AT_FDCWD,"/mnt/tmp",O_DIRECTORY,0777);
   TEST_CHECK(root_fd >= 0);
-  dir_fd  = mkdirat(root_fd,"test-dir",0777);
-  TEST_CHECK(dir_fd == 0);
+  rv = mkdirat(root_fd,"test-dir",0777);
+  TEST_CHECK(rv == 0);
   dir_fd = openat(root_fd,"test-dir",O_DIRECTORY);
   TEST_CHECK(dir_fd >= 0);