diff --git a/include/tests_authentication b/include/tests_authentication
index c25b7ca0..afaccd24 100644
--- a/include/tests_authentication
+++ b/include/tests_authentication
@@ -579,28 +579,29 @@
     if [ ${SKIPTEST} -eq 0 ]; then
         FOUND=0
         LogText "Test: Searching pam modules"
-        for I in ${PAM_FILE_LOCATIONS}; do
-            LogText "Test: Checking ${I}"
-            if [ -d ${I} -a ! -L ${I} ]; then
-                LogText "Result: directory ${I} exists"
+        for DIR in ${PAM_FILE_LOCATIONS}; do
+            LogText "Test: Checking ${DIR}"
+            if [ -d ${DIR} -a ! -L ${DIR} ]; then
+                LogText "Result: directory ${DIR} exists"
                 # Search in the specified directory
-                FIND=`find ${I} -maxdepth 1 -type f -name "pam_*.so" -print | sort`
+                FIND=`find ${DIR} -maxdepth 1 -type f -name "pam_*.so" -print | sort`
                 if [ ! "${FIND}" = "" ]; then FOUND=1; fi
-                for I in ${FIND}; do
-                    LogText "Found file: ${I}"
-                    Report "pam_module[]=${I}"
+                for FILE in ${FIND}; do
+                    LogText "Found file: ${FILE}"
+                    Report "pam_module[]=${FILE}"
                 done
-              else
-                LogText "Result: directory ${I} could not be found or is a symlink to another directory"
+            else
+                LogText "Result: directory ${DIR} could not be found or is a symlink to another directory"
             fi
         done
         # Check if we found at least one module
         if [ ${FOUND} -eq 0 ]; then
             Display --indent 2 --text "- Checking PAM modules" --result "${STATUS_NOT_FOUND}" --color WHITE
             LogText "Result: no PAM modules found"
-          else
+        else
             Display --indent 2 --text "- Checking PAM modules" --result "${STATUS_FOUND}" --color GREEN
         fi
+        unset DIR; unset FILE; unset FIND
     fi
 #
 #################################################################################