diff --git a/platform/rpm/firejail.spec b/platform/rpm/firejail.spec
index 9fe35e528..76d19ba17 100644
--- a/platform/rpm/firejail.spec
+++ b/platform/rpm/firejail.spec
@@ -19,7 +19,7 @@ using Linux namespaces. It includes a sandbox profile for Mozilla Firefox.
 %setup -q
 
 %build
-%configure --disable-userns
+%configure --disable-userns --disable-contrib-install
 make %{?_smp_mflags}
 
 %install
@@ -46,4 +46,4 @@ rm -rf %{buildroot}
 %{_mandir}/man5/__NAME__-login.5.gz
 %{_mandir}/man5/__NAME__-profile.5.gz
 %{_mandir}/man5/__NAME__-users.5.gz
-%config %{_sysconfdir}/__NAME__
+%config(noreplace) %{_sysconfdir}/__NAME__
diff --git a/test/apps-x11-xorg/apps-x11-xorg.sh b/test/apps-x11-xorg/apps-x11-xorg.sh
index 32331f786..ea07d3713 100755
--- a/test/apps-x11-xorg/apps-x11-xorg.sh
+++ b/test/apps-x11-xorg/apps-x11-xorg.sh
@@ -6,7 +6,7 @@
 export MALLOC_CHECK_=3
 export MALLOC_PERTURB_=$(($RANDOM % 255 + 1))
 
-which firefox
+which firefox 2>/dev/null
 if [ "$?" -eq 0 ];
 then
 	echo "TESTING: firefox x11 xorg"
@@ -15,7 +15,7 @@ else
 	echo "TESTING SKIP: firefox not found"
 fi
 
-which transmission-gtk
+which transmission-gtk 2>/dev/null
 if [ "$?" -eq 0 ];
 then
 	echo "TESTING: transmission-gtk x11 xorg"
@@ -24,7 +24,7 @@ else
 	echo "TESTING SKIP: transmission-gtk not found"
 fi
 
-which thunderbird
+which thunderbird 2>/dev/null
 if [ "$?" -eq 0 ];
 then
 	echo "TESTING: thunderbird x11 xorg"
diff --git a/test/apps-x11/apps-x11.sh b/test/apps-x11/apps-x11.sh
index 2e0031dd9..c12b11f3e 100755
--- a/test/apps-x11/apps-x11.sh
+++ b/test/apps-x11/apps-x11.sh
@@ -10,20 +10,20 @@ echo "TESTING: no x11 (test/apps-x11/x11-none.exp)"
 ./x11-none.exp
 
 
-which xterm
+which xterm 2>/dev/null
 if [ "$?" -eq 0 ];
 then
 	echo "TESTING: xterm x11 xorg"
 	./xterm-xorg.exp
 
-	which xpra
+	which xpra 2>/dev/null
 	if [ "$?" -eq 0 ];
 	then
 	echo "TESTING: xterm x11 xpra"
 	./xterm-xpra.exp
 	fi
 
-	which Xephyr
+	which Xephyr 2>/dev/null
 	if [ "$?" -eq 0 ];
 	then
 	echo "TESTING: xterm x11 xephyr"
@@ -34,13 +34,13 @@ else
 fi
 
 # check xpra/xephyr
-which xpra
+which xpra 2>/dev/null
 if [ "$?" -eq 0 ];
 then
         echo "xpra found"
 else
         echo "xpra not found"
-	which Xephyr
+	which Xephyr 2>/dev/null
 	if [ "$?" -eq 0 ];
 	then
         	echo "Xephyr found"
@@ -50,7 +50,7 @@ else
 	fi
 fi
 
-which firefox
+which firefox 2>/dev/null
 if [ "$?" -eq 0 ];
 then
 	echo "TESTING: firefox x11"
@@ -59,7 +59,7 @@ else
 	echo "TESTING SKIP: firefox not found"
 fi
 
-which chromium
+which chromium 2>/dev/null
 if [ "$?" -eq 0 ];
 then
 	echo "TESTING: chromium x11"
@@ -68,7 +68,7 @@ else
 	echo "TESTING SKIP: chromium not found"
 fi
 
-which transmission-gtk
+which transmission-gtk 2>/dev/null
 if [ "$?" -eq 0 ];
 then
 	echo "TESTING: transmission-gtk x11"
@@ -77,7 +77,7 @@ else
 	echo "TESTING SKIP: transmission-gtk not found"
 fi
 
-which thunderbird
+which thunderbird 2>/dev/null
 if [ "$?" -eq 0 ];
 then
 	echo "TESTING: thunderbird x11"
diff --git a/test/apps/apps.sh b/test/apps/apps.sh
index 4e0a9cc08..a3d0c4dc7 100755
--- a/test/apps/apps.sh
+++ b/test/apps/apps.sh
@@ -10,7 +10,7 @@ LIST="firefox midori chromium opera transmission-qt qbittorrent uget-gtk filezil
 LIST+="vlc fbreader deluge gnome-mplayer xchat wine kcalc ktorrent hexchat"
 
 for app in $LIST; do
-	which $app
+	which $app 2>/dev/null
 	if [ "$?" -eq 0 ];
 	then
 		echo "TESTING: $app"
diff --git a/test/arguments/arguments.sh b/test/arguments/arguments.sh
index 049236900..9500b5975 100755
--- a/test/arguments/arguments.sh
+++ b/test/arguments/arguments.sh
@@ -4,9 +4,8 @@ if [ -f /etc/debian_version ]; then
 	libdir=$(dirname "$(dpkg -L firejail | grep faudit)")
 	export PATH="$PATH:$libdir"
 else
-	export PATH="$PATH:/usr/lib/firejail"
+	export PATH="$PATH:/usr/lib/firejail:/usr/lib64/firejail"
 fi
-export PATH="$PATH:/usr/lib/firejail"
 
 echo "TESTING: 1. regular bash session"
 ./bashrun.exp
diff --git a/test/environment/environment.sh b/test/environment/environment.sh
index 364a4b65b..97ba8ba58 100755
--- a/test/environment/environment.sh
+++ b/test/environment/environment.sh
@@ -38,7 +38,7 @@ echo "TESTING: environment variables (test/environment/env.exp)"
 echo "TESTING: shell none(test/environment/shell-none.exp)"
 ./shell-none.exp
 
-which dash
+which dash 2>/dev/null
 if [ "$?" -eq 0 ];
 then
         echo "TESTING: dash (test/environment/dash.exp)"
@@ -47,7 +47,7 @@ else
         echo "TESTING SKIP: dash not found"
 fi
 
-which csh
+which csh 2>/dev/null
 if [ "$?" -eq 0 ];
 then
         echo "TESTING: csh (test/environment/csh.exp)"
@@ -56,7 +56,7 @@ else
         echo "TESTING SKIP: csh not found"
 fi
 
-which zsh
+which zsh 2>/dev/null
 if [ "$?" -eq 0 ];
 then
         echo "TESTING: zsh (test/environment/zsh.exp)"
@@ -68,7 +68,7 @@ fi
 echo "TESTING: firejail in firejail - single sandbox (test/environment/firejail-in-firejail.exp)"
 ./firejail-in-firejail.exp
 
-which aplay
+which aplay 2>/dev/null
 if [ "$?" -eq 0 ];
 then
         echo "TESTING: sound (test/environment/sound.exp)"
@@ -83,7 +83,7 @@ echo "TESTING: nice (test/environment/nice.exp)"
 echo "TESTING: quiet (test/environment/quiet.exp)"
 ./quiet.exp
 
-which strace
+which strace 2>/dev/null
 if [ "$?" -eq 0 ];
 then
         echo "TESTING: --allow-debuggers (test/environment/allow-debuggers.exp)"
diff --git a/test/fcopy/fcopy.sh b/test/fcopy/fcopy.sh
index 0e7cb2e5e..b225f9ea0 100755
--- a/test/fcopy/fcopy.sh
+++ b/test/fcopy/fcopy.sh
@@ -11,7 +11,7 @@ if [ -f /etc/debian_version ]; then
 	export PATH="$PATH:$libdir"
 fi
 
-export PATH="$PATH:/usr/lib/firejail"
+export PATH="$PATH:/usr/lib/firejail:/usr/lib64/firejail"
 
 mkdir dest
 
diff --git a/test/filters/filters.sh b/test/filters/filters.sh
index 97ecc8be0..ff197aa54 100755
--- a/test/filters/filters.sh
+++ b/test/filters/filters.sh
@@ -10,11 +10,9 @@ if [ -f /etc/debian_version ]; then
 	libdir=$(dirname "$(dpkg -L firejail | grep fseccomp)")
 	export PATH="$PATH:$libdir"
 else
-	export PATH="$PATH:/usr/lib/firejail"
+	export PATH="$PATH:/usr/lib/firejail:/usr/lib64/firejail"
 fi
 
-export PATH="$PATH:/usr/lib/firejail"
-
 if [ "$(uname -m)" = "x86_64" ]; then
     echo "TESTING: memory-deny-write-execute (test/filters/memwrexe.exp)"
     ./memwrexe.exp
@@ -79,7 +77,7 @@ echo "TESTING: seccomp errno (test/filters/seccomp-errno.exp)"
 echo "TESTING: seccomp su (test/filters/seccomp-su.exp)"
 ./seccomp-su.exp
 
-which strace
+which strace 2>/dev/null
 if [ $? -eq 0 ]; then
         echo "TESTING: seccomp ptrace (test/filters/seccomp-ptrace.exp)"
         ./seccomp-ptrace.exp
diff --git a/test/fnetfilter/fnetfilter.sh b/test/fnetfilter/fnetfilter.sh
index bae952ee9..aa2eb707a 100755
--- a/test/fnetfilter/fnetfilter.sh
+++ b/test/fnetfilter/fnetfilter.sh
@@ -11,7 +11,7 @@ if [ -f /etc/debian_version ]; then
 	export PATH="$PATH:$libdir"
 fi
 
-export PATH="$PATH:/usr/lib/firejail"
+export PATH="$PATH:/usr/lib/firejail:/usr/lib64/firejail"
 
 chmod 400 outlocked
 
diff --git a/test/overlay/overlay.sh b/test/overlay/overlay.sh
index 6b7f779d7..9daf1f5f6 100755
--- a/test/overlay/overlay.sh
+++ b/test/overlay/overlay.sh
@@ -21,7 +21,7 @@ rm -fr ~/_firejail_test_*
 ./fs-tmpfs.exp
 rm -fr ~/_firejail_test_*
 
-which firefox
+which firefox 2>/dev/null
 if [ "$?" -eq 0 ];
 then
 	echo "TESTING: overlay firefox"
@@ -30,7 +30,7 @@ else
 	echo "TESTING SKIP: firefox not found"
 fi
 
-which firefox
+which firefox 2>/dev/null
 if [ "$?" -eq 0 ];
 then
 	echo "TESTING: overlay firefox x11 xorg"
@@ -41,13 +41,13 @@ fi
 
 
 # check xpra/xephyr
-which xpra
+which xpra 2>/dev/null
 if [ "$?" -eq 0 ];
 then
         echo "xpra found"
 else
         echo "xpra not found"
-	which Xephyr
+	which Xephyr 2>/dev/null
 	if [ "$?" -eq 0 ];
 	then
         	echo "Xephyr found"
@@ -57,7 +57,7 @@ else
 	fi
 fi
 
-which firefox
+which firefox 2>/dev/null
 if [ "$?" -eq 0 ];
 then
 	echo "TESTING: overlay firefox x11"
diff --git a/test/private-lib/private-lib.sh b/test/private-lib/private-lib.sh
index 312fe502a..2a0eb8d30 100755
--- a/test/private-lib/private-lib.sh
+++ b/test/private-lib/private-lib.sh
@@ -9,7 +9,7 @@ LIST="evince galculator gnome-calculator leafpad mousepad transmission-gtk xcalc
 
 
 for app in $LIST; do
-	which $app
+	which $app 2>/dev/null
 	if [ "$?" -eq 0 ];
 	then
 		echo "TESTING: private-lib $app"
diff --git a/test/root/root.sh b/test/root/root.sh
index 4f217b727..a20142c5f 100755
--- a/test/root/root.sh
+++ b/test/root/root.sh
@@ -7,7 +7,7 @@
 #********************************
 # firecfg
 #********************************
-which less
+which less 2>/dev/null
 if [ "$?" -eq 0 ];
 then
 	echo "TESTING: firecfg (test/root/firecfg.exp)"
diff --git a/test/sysutils/sysutils.sh b/test/sysutils/sysutils.sh
index dd09e4533..6794af520 100755
--- a/test/sysutils/sysutils.sh
+++ b/test/sysutils/sysutils.sh
@@ -6,7 +6,7 @@
 export MALLOC_CHECK_=3
 export MALLOC_PERTURB_=$(($RANDOM % 255 + 1))
 
-which cpio
+which cpio 2>/dev/null
 if [ "$?" -eq 0 ];
 then
 	echo "TESTING: cpio"
@@ -24,7 +24,7 @@ fi
 #	echo "TESTING SKIP: strings not found"
 #fi
 
-which gzip
+which gzip 2>/dev/null
 if [ "$?" -eq 0 ];
 then
 	echo "TESTING: gzip"
@@ -33,7 +33,7 @@ else
 	echo "TESTING SKIP: gzip not found"
 fi
 
-which xzdec
+which xzdec 2>/dev/null
 if [ "$?" -eq 0 ];
 then
 	echo "TESTING: xzdec"
@@ -42,7 +42,7 @@ else
 	echo "TESTING SKIP: xzdec not found"
 fi
 
-which xz
+which xz 2>/dev/null
 if [ "$?" -eq 0 ];
 then
 	echo "TESTING: xz"
@@ -51,7 +51,7 @@ else
 	echo "TESTING SKIP: xz not found"
 fi
 
-which less
+which less 2>/dev/null
 if [ "$?" -eq 0 ];
 then
 	echo "TESTING: less"
@@ -60,7 +60,7 @@ else
 	echo "TESTING SKIP: less not found"
 fi
 
-which file
+which file 2>/dev/null
 if [ "$?" -eq 0 ];
 then
 	echo "TESTING: file"
@@ -69,7 +69,7 @@ else
 	echo "TESTING SKIP: file not found"
 fi
 
-which tar
+which tar 2>/dev/null
 if [ "$?" -eq 0 ];
 then
 	echo "TESTING: tar"
@@ -78,7 +78,7 @@ else
 	echo "TESTING SKIP: tar not found"
 fi
 
-which ping
+which ping 2>/dev/null
 if [ "$?" -eq 0 ];
 then
 	echo "TESTING: ping"
diff --git a/test/utils/utils.sh b/test/utils/utils.sh
index 5438e11a8..d98e4c2e4 100755
--- a/test/utils/utils.sh
+++ b/test/utils/utils.sh
@@ -10,7 +10,7 @@ if [ -f /etc/debian_version ]; then
 	libdir=$(dirname "$(dpkg -L firejail | grep faudit)")
 	export PATH="$PATH:$libdir"
 fi
-export PATH="$PATH:/usr/lib/firejail"
+export PATH="$PATH:/usr/lib/firejail:/usr/lib64/firejail"
 
 echo "testing" > ~/firejail-test-file-7699
 echo "testing" > /tmp/firejail-test-file-7699
@@ -39,7 +39,7 @@ echo "TESTING: version (test/utils/version.exp)"
 echo "TESTING: help (test/utils/help.exp)"
 ./help.exp
 
-which man
+which man 2>/dev/null
 if [ "$?" -eq 0 ];
 then
         echo "TESTING: man (test/utils/man.exp)"