12197 sleeptest is failing

@@ -10,10 +10,11 @@
 # http://www.illumos.org/license/CDDL.
 #
 
 #
 # Copyright 2019 Robert Mustacchi
+# Copyright 2020 Joyent, Inc.
 #
 
 #
 # Basic tests of sleep(1). sleep is a little hard to test, especially
 # for longer running cases. Therefore to test it, we basically take

@@ -166,15 +167,14 @@
 sleep_err 1z
 sleep_err -- -0.3
 
 #
 # Test a locale that uses a ',' character (de_DE.UTF-8 is one) as the
-# decimal point to make sure that sleep correctly is using LC_NUMERIC.
-#
-export LANG=de_DE.UTF-8
+# decimal point to make sure that sleep is correctly using LC_NUMERIC.
+export LC_ALL=de_DE.UTF-8
 sleep_err 21.45
 sleep_one 2,5 2 500000000
 sleep_one 34,0051 34 5100000
 sleep_one 3,6d 311040 0
-export LANG=C.UTF-8
+export LC_ALL=C.UTF-8
 
 exit $sleep_exit