diff --git a/include/tests_filesystems b/include/tests_filesystems
index cabc27e7..58efe975 100644
--- a/include/tests_filesystems
+++ b/include/tests_filesystems
@@ -877,8 +877,8 @@
                 fi
                 FIND=$(${LSBINARY} ${ROOTDIR}etc/modprobe.d/* 2> /dev/null)
                 if [ -n "${FIND}" ]; then
-                    FIND1=$(${GREPBINARY} -E "^blacklist \+${FS}$" ${ROOTDIR}etc/modprobe.d/* | ${GREPBINARY} -v "#")
-                    FIND2=$(${GREPBINARY} -E "^install \+${FS} \+/bin/true$" ${ROOTDIR}etc/modprobe.d/* | ${GREPBINARY} -v "#")
+                    FIND1=$(${GREPBINARY} -E "^blacklist[[:space:]]+${FS}$" ${ROOTDIR}etc/modprobe.d/* | ${GREPBINARY} -v "#")
+                    FIND2=$(${GREPBINARY} -E "^install[[:space:]]+${FS}[[:space:]]+/bin/(true|false)$" ${ROOTDIR}etc/modprobe.d/* | ${GREPBINARY} -v "#")
                         if [ -n "${FIND1}" ] || [ -n "${FIND2}" ]; then
                             Display --indent 4 --text "- Module $FS is blacklisted" --result "OK" --color GREEN
                             LogText "Result: module ${FS} is blacklisted"
diff --git a/include/tests_networking b/include/tests_networking
index 44a65708..764204cf 100644
--- a/include/tests_networking
+++ b/include/tests_networking
@@ -750,7 +750,7 @@
                         UNCOMMON_PROTOCOL_DISABLED=0
                         # First check modprobe.conf
                         if [ -f ${ROOTDIR}etc/modprobe.conf ]; then
-                            DATA=$(${GREPBINARY} "^install \+${P} \+/bin/(true|false)$" ${ROOTDIR}etc/modprobe.conf)
+                            DATA=$(${GREPBINARY} -E "^install[[:space:]]+${P}[[:space:]]+/bin/(true|false)$" ${ROOTDIR}etc/modprobe.conf)
                             if [ -n "${DATA}" ]; then
                                 LogText "Result: found ${P} module disabled via modprobe.conf"
                                 UNCOMMON_PROTOCOL_DISABLED=1
@@ -759,7 +759,7 @@
                         # Then additional modprobe configuration files
                         if [ -d ${ROOTDIR}etc/modprobe.d ]; then
                             # Return file names (-l) and suppress errors (-s)
-                            DATA=$(${GREPBINARY} -l -s "^install \+${P} \+/bin/(true|false)$" ${ROOTDIR}etc/modprobe.d/*)
+                            DATA=$(${GREPBINARY} -l -s -E "^install[[:space:]]+${P}[[:space:]]+/bin/(true|false)$" ${ROOTDIR}etc/modprobe.d/*)
                             if [ -n "${DATA}" ]; then
                                 UNCOMMON_PROTOCOL_DISABLED=1
                                 for F in ${DATA}; do