diff --git a/tools/testing/selftests/net/mptcp/diag.sh b/tools/testing/selftests/net/mptcp/diag.sh
index eec1f04d231f59..9e19e3e8d833b0 100755
--- a/tools/testing/selftests/net/mptcp/diag.sh
+++ b/tools/testing/selftests/net/mptcp/diag.sh
@@ -33,7 +33,7 @@ cleanup()
 {
 	ip netns pids "${ns1}" | xargs --no-run-if-empty kill -SIGKILL &>/dev/null
 
-	mptcp_lib_ns_exit "${ns1}"
+	cleanup_all_ns
 }
 
 mptcp_lib_check_mptcp
diff --git a/tools/testing/selftests/net/mptcp/mptcp_connect.sh b/tools/testing/selftests/net/mptcp/mptcp_connect.sh
index b77fb7065bfb8c..4e2c5dd0de3c48 100755
--- a/tools/testing/selftests/net/mptcp/mptcp_connect.sh
+++ b/tools/testing/selftests/net/mptcp/mptcp_connect.sh
@@ -142,7 +142,7 @@ cleanup()
 	rm -f "$sin" "$sout"
 	rm -f "$capout"
 
-	mptcp_lib_ns_exit "${ns1}" "${ns2}" "${ns3}" "${ns4}"
+	cleanup_all_ns
 }
 
 mptcp_lib_check_mptcp
@@ -271,7 +271,6 @@ check_mptcp_disabled()
 	local err=0
 	LC_ALL=C ip netns exec ${disabled_ns} ./mptcp_connect -p 10000 -s MPTCP 127.0.0.1 < "$cin" 2>&1 | \
 		grep -q "^socket: Protocol not available$" && err=1
-	mptcp_lib_ns_exit "${disabled_ns}"
 
 	if [ ${err} -eq 0 ]; then
 		mptcp_lib_pr_fail "New MPTCP socket cannot be blocked via sysctl"
diff --git a/tools/testing/selftests/net/mptcp/mptcp_join.sh b/tools/testing/selftests/net/mptcp/mptcp_join.sh
index fefa9173bdaaab..87a518b8c19f94 100755
--- a/tools/testing/selftests/net/mptcp/mptcp_join.sh
+++ b/tools/testing/selftests/net/mptcp/mptcp_join.sh
@@ -132,8 +132,6 @@ init_shapers()
 cleanup_partial()
 {
 	rm -f "$capout"
-
-	mptcp_lib_ns_exit "${ns1}" "${ns2}"
 }
 
 init() {
@@ -166,6 +164,7 @@ cleanup()
 	rm -rf $evts_ns1 $evts_ns2
 	rm -f "$err"
 	cleanup_partial
+	cleanup_all_ns
 }
 
 print_check()
diff --git a/tools/testing/selftests/net/mptcp/mptcp_lib.sh b/tools/testing/selftests/net/mptcp/mptcp_lib.sh
index 59eb77e7813db7..bd7d78e4aa83cc 100644
--- a/tools/testing/selftests/net/mptcp/mptcp_lib.sh
+++ b/tools/testing/selftests/net/mptcp/mptcp_lib.sh
@@ -424,14 +424,6 @@ mptcp_lib_ns_init() {
 	done
 }
 
-mptcp_lib_ns_exit() {
-	local netns
-	for netns in "${@}"; do
-		ip netns del "${netns}"
-		rm -f /tmp/"${netns}".{nstat,out}
-	done
-}
-
 mptcp_lib_events() {
 	local ns="${1}"
 	local evts="${2}"
diff --git a/tools/testing/selftests/net/mptcp/mptcp_sockopt.sh b/tools/testing/selftests/net/mptcp/mptcp_sockopt.sh
index 68899a303a1aef..e1026b028739f2 100755
--- a/tools/testing/selftests/net/mptcp/mptcp_sockopt.sh
+++ b/tools/testing/selftests/net/mptcp/mptcp_sockopt.sh
@@ -98,7 +98,7 @@ init()
 #shellcheck disable=SC2317
 cleanup()
 {
-	mptcp_lib_ns_exit "${ns1}" "${ns2}" "${ns_sbox}"
+	cleanup_all_ns
 	rm -f "$cin" "$cout"
 	rm -f "$sin" "$sout"
 }
diff --git a/tools/testing/selftests/net/mptcp/pm_netlink.sh b/tools/testing/selftests/net/mptcp/pm_netlink.sh
index 2757378b1b1366..5b4d83c2e28051 100755
--- a/tools/testing/selftests/net/mptcp/pm_netlink.sh
+++ b/tools/testing/selftests/net/mptcp/pm_netlink.sh
@@ -36,7 +36,7 @@ err=$(mktemp)
 cleanup()
 {
 	rm -f "${err}"
-	mptcp_lib_ns_exit "${ns1}"
+	cleanup_all_ns
 }
 
 mptcp_lib_check_mptcp
diff --git a/tools/testing/selftests/net/mptcp/simult_flows.sh b/tools/testing/selftests/net/mptcp/simult_flows.sh
index d0b39c2e38a3c6..6eddb3bba2e830 100755
--- a/tools/testing/selftests/net/mptcp/simult_flows.sh
+++ b/tools/testing/selftests/net/mptcp/simult_flows.sh
@@ -42,7 +42,7 @@ cleanup()
 	rm -f "$large" "$small"
 	rm -f "$capout"
 
-	mptcp_lib_ns_exit "${ns1}" "${ns2}" "${ns3}"
+	cleanup_all_ns
 }
 
 mptcp_lib_check_mptcp
diff --git a/tools/testing/selftests/net/mptcp/userspace_pm.sh b/tools/testing/selftests/net/mptcp/userspace_pm.sh
index 9e2981f2d7f5ce..0c089e7f5f0abc 100755
--- a/tools/testing/selftests/net/mptcp/userspace_pm.sh
+++ b/tools/testing/selftests/net/mptcp/userspace_pm.sh
@@ -107,7 +107,7 @@ cleanup()
 		mptcp_lib_kill_wait $pid
 	done
 
-	mptcp_lib_ns_exit "${ns1}" "${ns2}"
+	cleanup_all_ns
 
 	rm -rf $file $client_evts $server_evts