diff --git a/build-aux/check-mescc.sh b/build-aux/check-mescc.sh
index 9495e2de..347e7c1f 100755
--- a/build-aux/check-mescc.sh
+++ b/build-aux/check-mescc.sh
@@ -211,6 +211,7 @@ scaffold/tests/a1-global-no-clobber
 "
 
 broken="$broken
+lib/tests/posix/50-getenv
 scaffold/tests/17-compare-unsigned-char-le
 scaffold/tests/17-compare-unsigned-short-le
 scaffold/tests/66-local-char-array
diff --git a/lib/tests/posix/50-getenv.c b/lib/tests/posix/50-getenv.c
index f58b7fdd..2397c164 100644
--- a/lib/tests/posix/50-getenv.c
+++ b/lib/tests/posix/50-getenv.c
@@ -1,6 +1,6 @@
 /* -*-comment-start: "//";comment-end:""-*-
  * GNU Mes --- Maxwell Equations of Software
- * Copyright © 2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+ * Copyright © 2018,2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
  *
  * This file is part of GNU Mes.
  *
@@ -25,7 +25,7 @@ int
 main (int argc, char const *argv[])
 {
   eputs ("test:getenv\n");
-  if (getenv ("SHELL") == 0)
+  if (getenv ("PATH") == 0)
     return 1;
   return 0;
 }