diff --git a/include/tests_authentication b/include/tests_authentication
index 89a81a29..6921373c 100644
--- a/include/tests_authentication
+++ b/include/tests_authentication
@@ -124,7 +124,7 @@
             # Read only mode
             FIND=`${GRPCKBINARY} -r 2> /dev/null ; echo $?`
           elif [ "${OS}" = "AIX" ]; then
-            FIND=`${GRPCKBINARY} -n 2> /dev/null ; echo $?`
+            FIND=`${GRPCKBINARY} -n ALL 2> /dev/null ; echo $?`
           else
             FIND=`${GRPCKBINARY} 2> /dev/null ; echo $?`
         fi