diff --git a/tools/testing/selftests/net/mptcp/mptcp_join.sh b/tools/testing/selftests/net/mptcp/mptcp_join.sh
index e6c9d5451c5b5..b5eeea4c3efaf 100755
--- a/tools/testing/selftests/net/mptcp/mptcp_join.sh
+++ b/tools/testing/selftests/net/mptcp/mptcp_join.sh
@@ -49,11 +49,15 @@ TEST_COUNT=0
 TEST_NAME=""
 nr_blank=40
 
-export FAILING_LINKS=""
-export test_linkfail=0
-export addr_nr_ns1=0
-export addr_nr_ns2=0
-export sflags=""
+# These var are used only in some tests, make sure they are not already set
+unset FAILING_LINKS
+unset test_linkfail
+unset addr_nr_ns1
+unset addr_nr_ns2
+unset sflags
+unset fastclose
+unset fullmesh
+unset speed
 
 # generated using "nfbpf_compile '(ip && (ip[54] & 0xf0) == 0x30) ||
 #				  (ip6 && (ip6[74] & 0xf0) == 0x30)'"
@@ -100,7 +104,6 @@ init_partial()
 	stats_dumped=0
 	check_invert=0
 	validate_checksum=$checksum
-	FAILING_LINKS=""
 
 	#  ns1         ns2
 	# ns1eth1    ns2eth1
@@ -828,6 +831,17 @@ pm_nl_set_endpoint()
 	local connector_ns="$2"
 	local connect_addr="$3"
 
+	local addr_nr_ns1=${addr_nr_ns1:-0}
+	local addr_nr_ns2=${addr_nr_ns2:-0}
+	local sflags=${sflags:-""}
+	local fullmesh=${fullmesh:-""}
+
+	local flags="subflow"
+	if [ -n "${fullmesh}" ]; then
+		flags="${flags},fullmesh"
+		addr_nr_ns2=${fullmesh}
+	fi
+
 	# let the mptcp subflow be established in background before
 	# do endpoint manipulation
 	if [ $addr_nr_ns1 != "0" ] || [ $addr_nr_ns2 != "0" ]; then
@@ -975,10 +989,12 @@ do_transfer()
 	local cl_proto="$3"
 	local srv_proto="$4"
 	local connect_addr="$5"
-	local speed="$6"
 
 	local port=$((10000 + TEST_COUNT - 1))
 	local cappid
+	local FAILING_LINKS=${FAILING_LINKS:-""}
+	local fastclose=${fastclose:-""}
+	local speed=${speed:-"fast"}
 
 	:> "$cout"
 	:> "$sout"
@@ -1011,15 +1027,14 @@ do_transfer()
 		extra_args="-j"
 	elif [ $speed = "slow" ]; then
 		extra_args="-r 50"
-	elif [[ $speed = "speed_"* ]]; then
-		extra_args="-r ${speed:6}"
+	elif [ $speed -gt 0 ]; then
+		extra_args="-r ${speed}"
 	fi
 
-	local flags="subflow"
 	local extra_cl_args=""
 	local extra_srv_args=""
 	local trunc_size=""
-	if [[ "${addr_nr_ns2}" = "fastclose_"* ]]; then
+	if [ -n "${fastclose}" ]; then
 		if [ ${test_linkfail} -le 1 ]; then
 			echo "fastclose tests need test_linkfail argument"
 			fail_test
@@ -1028,7 +1043,7 @@ do_transfer()
 
 		# disconnect
 		trunc_size=${test_linkfail}
-		local side=${addr_nr_ns2:10}
+		local side=${fastclose}
 
 		if [ ${side} = "client" ]; then
 			extra_cl_args="-f ${test_linkfail}"
@@ -1041,10 +1056,6 @@ do_transfer()
 			fail_test
 			return 1
 		fi
-		addr_nr_ns2=0
-	elif [[ "${addr_nr_ns2}" = "fullmesh_"* ]]; then
-		flags="${flags},fullmesh"
-		addr_nr_ns2=${addr_nr_ns2:9}
 	fi
 
 	extra_srv_args="$extra_args $extra_srv_args"
@@ -1155,9 +1166,9 @@ run_tests()
 	local listener_ns="$1"
 	local connector_ns="$2"
 	local connect_addr="$3"
-	local speed="${4:-fast}"
 
 	local size
+	local test_linkfail=${test_linkfail:-0}
 
 	# The values above 2 are reused to make test files
 	# with the given sizes (KB)
@@ -1199,7 +1210,7 @@ run_tests()
 		make_file "$sinfail" "server" $size
 	fi
 
-	do_transfer ${listener_ns} ${connector_ns} MPTCP MPTCP ${connect_addr} ${speed}
+	do_transfer ${listener_ns} ${connector_ns} MPTCP MPTCP ${connect_addr}
 }
 
 dump_stats()
@@ -1988,7 +1999,8 @@ subflows_error_tests()
 		pm_nl_set_limits $ns1 0 1
 		pm_nl_set_limits $ns2 0 1
 		pm_nl_add_endpoint $ns2 10.0.1.2 flags subflow
-		run_tests $ns1 $ns2 10.0.1.1 slow
+		speed=slow \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 0 0 0
 	fi
 
@@ -1999,7 +2011,8 @@ subflows_error_tests()
 		pm_nl_set_limits $ns2 0 2
 		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
 		pm_nl_add_endpoint $ns2 10.0.2.2 flags subflow
-		run_tests $ns1 $ns2 10.0.1.1 slow
+		speed=slow \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 1 1 1
 	fi
 
@@ -2010,7 +2023,8 @@ subflows_error_tests()
 		pm_nl_set_limits $ns2 0 2
 		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
 		pm_nl_add_endpoint $ns2 10.0.2.2 flags subflow
-		run_tests $ns1 $ns2 10.0.1.1 slow
+		speed=slow \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 1 1 1
 	fi
 
@@ -2022,7 +2036,8 @@ subflows_error_tests()
 		pm_nl_set_limits $ns1 0 1
 		pm_nl_set_limits $ns2 0 1
 		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
-		run_tests $ns1 $ns2 10.0.1.1 slow &
+		speed=slow \
+			run_tests $ns1 $ns2 10.0.1.1 &
 
 		# mpj subflow will be in TW after the reset
 		wait_attempt_fail $ns2
@@ -2121,7 +2136,8 @@ signal_address_tests()
 
 		# the peer could possibly miss some addr notification, allow retransmission
 		ip netns exec $ns1 sysctl -q net.mptcp.add_addr_timeout=1
-		run_tests $ns1 $ns2 10.0.1.1 slow
+		speed=slow \
+			run_tests $ns1 $ns2 10.0.1.1
 
 		# It is not directly linked to the commit introducing this
 		# symbol but for the parent one which is linked anyway.
@@ -2231,7 +2247,8 @@ add_addr_timeout_tests()
 		pm_nl_set_limits $ns1 0 1
 		pm_nl_set_limits $ns2 1 1
 		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal
-		run_tests $ns1 $ns2 10.0.1.1 slow
+		speed=slow \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 1 1 1
 		chk_add_tx_nr 4 4
 		chk_add_nr 4 0
@@ -2242,7 +2259,8 @@ add_addr_timeout_tests()
 		pm_nl_set_limits $ns1 0 1
 		pm_nl_set_limits $ns2 1 1
 		pm_nl_add_endpoint $ns1 dead:beef:2::1 flags signal
-		run_tests $ns1 $ns2 dead:beef:1::1 slow
+		speed=slow \
+			run_tests $ns1 $ns2 dead:beef:1::1
 		chk_join_nr 1 1 1
 		chk_add_nr 4 0
 	fi
@@ -2253,7 +2271,8 @@ add_addr_timeout_tests()
 		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal
 		pm_nl_add_endpoint $ns1 10.0.3.1 flags signal
 		pm_nl_set_limits $ns2 2 2
-		run_tests $ns1 $ns2 10.0.1.1 speed_10
+		speed=10 \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 2 2 2
 		chk_add_nr 8 0
 	fi
@@ -2264,7 +2283,8 @@ add_addr_timeout_tests()
 		pm_nl_add_endpoint $ns1 10.0.12.1 flags signal
 		pm_nl_add_endpoint $ns1 10.0.3.1 flags signal
 		pm_nl_set_limits $ns2 2 2
-		run_tests $ns1 $ns2 10.0.1.1 speed_10
+		speed=10 \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 1 1 1
 		chk_add_nr 8 0
 	fi
@@ -2277,8 +2297,8 @@ remove_tests()
 		pm_nl_set_limits $ns1 0 1
 		pm_nl_set_limits $ns2 0 1
 		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
-		addr_nr_ns2=-1 \
-			run_tests $ns1 $ns2 10.0.1.1 slow
+		addr_nr_ns2=-1 speed=slow \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 1 1 1
 		chk_rm_tx_nr 1
 		chk_rm_nr 1 1
@@ -2290,8 +2310,8 @@ remove_tests()
 		pm_nl_set_limits $ns2 0 2
 		pm_nl_add_endpoint $ns2 10.0.2.2 flags subflow
 		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
-		addr_nr_ns2=-2 \
-			run_tests $ns1 $ns2 10.0.1.1 slow
+		addr_nr_ns2=-2 speed=slow \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 2 2 2
 		chk_rm_nr 2 2
 	fi
@@ -2301,8 +2321,8 @@ remove_tests()
 		pm_nl_set_limits $ns1 0 1
 		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal
 		pm_nl_set_limits $ns2 1 1
-		addr_nr_ns1=-1 \
-			run_tests $ns1 $ns2 10.0.1.1 slow
+		addr_nr_ns1=-1 speed=slow \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 1 1 1
 		chk_add_nr 1 1
 		chk_rm_nr 1 1 invert
@@ -2314,8 +2334,8 @@ remove_tests()
 		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal
 		pm_nl_set_limits $ns2 1 2
 		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
-		addr_nr_ns1=-1 addr_nr_ns2=-1 \
-			run_tests $ns1 $ns2 10.0.1.1 slow
+		addr_nr_ns1=-1 addr_nr_ns2=-1 speed=slow \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 2 2 2
 		chk_add_nr 1 1
 		chk_rm_nr 1 1
@@ -2328,8 +2348,8 @@ remove_tests()
 		pm_nl_set_limits $ns2 1 3
 		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
 		pm_nl_add_endpoint $ns2 10.0.4.2 flags subflow
-		addr_nr_ns1=-1 addr_nr_ns2=-2 \
-			run_tests $ns1 $ns2 10.0.1.1 speed_10
+		addr_nr_ns1=-1 addr_nr_ns2=-2 speed=10 \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 3 3 3
 		chk_add_nr 1 1
 		chk_rm_nr 2 2
@@ -2342,8 +2362,8 @@ remove_tests()
 		pm_nl_add_endpoint $ns1 10.0.3.1 flags signal
 		pm_nl_add_endpoint $ns1 10.0.4.1 flags signal
 		pm_nl_set_limits $ns2 3 3
-		addr_nr_ns1=-3 \
-			run_tests $ns1 $ns2 10.0.1.1 speed_10
+		addr_nr_ns1=-3 speed=10 \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 3 3 3
 		chk_add_nr 3 3
 		chk_rm_nr 3 3 invert
@@ -2356,8 +2376,8 @@ remove_tests()
 		pm_nl_add_endpoint $ns1 10.0.3.1 flags signal
 		pm_nl_add_endpoint $ns1 10.0.14.1 flags signal
 		pm_nl_set_limits $ns2 3 3
-		addr_nr_ns1=-3 \
-			run_tests $ns1 $ns2 10.0.1.1 speed_10
+		addr_nr_ns1=-3 speed=10 \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 1 1 1
 		chk_add_nr 3 3
 		chk_rm_nr 3 1 invert
@@ -2370,8 +2390,8 @@ remove_tests()
 		pm_nl_set_limits $ns2 1 3
 		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
 		pm_nl_add_endpoint $ns2 10.0.4.2 flags subflow
-		addr_nr_ns1=-8 addr_nr_ns2=-8 \
-			run_tests $ns1 $ns2 10.0.1.1 slow
+		addr_nr_ns1=-8 addr_nr_ns2=-8 speed=slow \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 3 3 3
 		chk_add_nr 1 1
 		chk_rm_nr 1 3 invert simult
@@ -2384,8 +2404,8 @@ remove_tests()
 		pm_nl_add_endpoint $ns2 10.0.2.2 flags subflow id 150
 		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
 		pm_nl_add_endpoint $ns2 10.0.4.2 flags subflow
-		addr_nr_ns1=-8 addr_nr_ns2=-8 \
-			run_tests $ns1 $ns2 10.0.1.1 slow
+		addr_nr_ns1=-8 addr_nr_ns2=-8 speed=slow \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 3 3 3
 
 		if mptcp_lib_kversion_ge 5.18; then
@@ -2403,8 +2423,8 @@ remove_tests()
 		pm_nl_add_endpoint $ns1 10.0.3.1 flags signal
 		pm_nl_add_endpoint $ns1 10.0.4.1 flags signal
 		pm_nl_set_limits $ns2 3 3
-		addr_nr_ns1=-8 addr_nr_ns2=-8 \
-			run_tests $ns1 $ns2 10.0.1.1 slow
+		addr_nr_ns1=-8 addr_nr_ns2=-8 speed=slow \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 3 3 3
 		chk_add_nr 3 3
 		chk_rm_nr 3 3 invert simult
@@ -2417,8 +2437,8 @@ remove_tests()
 		pm_nl_add_endpoint $ns1 10.0.3.1 flags signal
 		pm_nl_add_endpoint $ns1 10.0.14.1 flags signal
 		pm_nl_set_limits $ns2 3 3
-		addr_nr_ns1=-8 \
-			run_tests $ns1 $ns2 10.0.1.1 slow
+		addr_nr_ns1=-8 speed=slow \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 1 1 1
 		chk_add_nr 3 3
 		chk_rm_nr 3 1 invert
@@ -2429,8 +2449,8 @@ remove_tests()
 		pm_nl_set_limits $ns1 0 1
 		pm_nl_set_limits $ns2 0 1
 		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
-		addr_nr_ns2=-9 \
-			run_tests $ns1 $ns2 10.0.1.1 slow
+		addr_nr_ns2=-9 speed=slow \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 1 1 1
 		chk_rm_nr 1 1
 	fi
@@ -2440,8 +2460,8 @@ remove_tests()
 		pm_nl_set_limits $ns1 0 1
 		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal
 		pm_nl_set_limits $ns2 1 1
-		addr_nr_ns1=-9 \
-			run_tests $ns1 $ns2 10.0.1.1 slow
+		addr_nr_ns1=-9 speed=slow \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 1 1 1
 		chk_add_nr 1 1
 		chk_rm_nr 1 1 invert
@@ -2454,8 +2474,8 @@ add_tests()
 	if reset "add single subflow"; then
 		pm_nl_set_limits $ns1 0 1
 		pm_nl_set_limits $ns2 0 1
-		addr_nr_ns2=1 \
-			run_tests $ns1 $ns2 10.0.1.1 slow
+		addr_nr_ns2=1 speed=slow \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 1 1 1
 	fi
 
@@ -2463,8 +2483,8 @@ add_tests()
 	if reset "add signal address"; then
 		pm_nl_set_limits $ns1 0 1
 		pm_nl_set_limits $ns2 1 1
-		addr_nr_ns1=1 \
-			run_tests $ns1 $ns2 10.0.1.1 slow
+		addr_nr_ns1=1 speed=slow \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 1 1 1
 		chk_add_nr 1 1
 	fi
@@ -2473,8 +2493,8 @@ add_tests()
 	if reset "add multiple subflows"; then
 		pm_nl_set_limits $ns1 0 2
 		pm_nl_set_limits $ns2 0 2
-		addr_nr_ns2=2 \
-			run_tests $ns1 $ns2 10.0.1.1 slow
+		addr_nr_ns2=2 speed=slow \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 2 2 2
 	fi
 
@@ -2482,8 +2502,8 @@ add_tests()
 	if reset "add multiple subflows IPv6"; then
 		pm_nl_set_limits $ns1 0 2
 		pm_nl_set_limits $ns2 0 2
-		addr_nr_ns2=2 \
-			run_tests $ns1 $ns2 dead:beef:1::1 slow
+		addr_nr_ns2=2 speed=slow \
+			run_tests $ns1 $ns2 dead:beef:1::1
 		chk_join_nr 2 2 2
 	fi
 
@@ -2491,8 +2511,8 @@ add_tests()
 	if reset "add multiple addresses IPv6"; then
 		pm_nl_set_limits $ns1 0 2
 		pm_nl_set_limits $ns2 2 2
-		addr_nr_ns1=2 \
-			run_tests $ns1 $ns2 dead:beef:1::1 slow
+		addr_nr_ns1=2 speed=slow \
+			run_tests $ns1 $ns2 dead:beef:1::1
 		chk_join_nr 2 2 2
 		chk_add_nr 2 2
 	fi
@@ -2505,14 +2525,16 @@ ipv6_tests()
 		pm_nl_set_limits $ns1 0 1
 		pm_nl_set_limits $ns2 0 1
 		pm_nl_add_endpoint $ns2 dead:beef:3::2 dev ns2eth3 flags subflow
-		run_tests $ns1 $ns2 dead:beef:1::1 slow
+		speed=slow \
+			run_tests $ns1 $ns2 dead:beef:1::1
 		chk_join_nr 1 1 1
 	fi
 
 	# add_address, unused IPv6
 	if reset "unused signal address IPv6"; then
 		pm_nl_add_endpoint $ns1 dead:beef:2::1 flags signal
-		run_tests $ns1 $ns2 dead:beef:1::1 slow
+		speed=slow \
+			run_tests $ns1 $ns2 dead:beef:1::1
 		chk_join_nr 0 0 0
 		chk_add_nr 1 1
 	fi
@@ -2522,7 +2544,8 @@ ipv6_tests()
 		pm_nl_set_limits $ns1 0 1
 		pm_nl_add_endpoint $ns1 dead:beef:2::1 flags signal
 		pm_nl_set_limits $ns2 1 1
-		run_tests $ns1 $ns2 dead:beef:1::1 slow
+		speed=slow \
+			run_tests $ns1 $ns2 dead:beef:1::1
 		chk_join_nr 1 1 1
 		chk_add_nr 1 1
 	fi
@@ -2532,8 +2555,8 @@ ipv6_tests()
 		pm_nl_set_limits $ns1 0 1
 		pm_nl_add_endpoint $ns1 dead:beef:2::1 flags signal
 		pm_nl_set_limits $ns2 1 1
-		addr_nr_ns1=-1 \
-			run_tests $ns1 $ns2 dead:beef:1::1 slow
+		addr_nr_ns1=-1 speed=slow \
+			run_tests $ns1 $ns2 dead:beef:1::1
 		chk_join_nr 1 1 1
 		chk_add_nr 1 1
 		chk_rm_nr 1 1 invert
@@ -2545,8 +2568,8 @@ ipv6_tests()
 		pm_nl_add_endpoint $ns1 dead:beef:2::1 flags signal
 		pm_nl_set_limits $ns2 1 2
 		pm_nl_add_endpoint $ns2 dead:beef:3::2 dev ns2eth3 flags subflow
-		addr_nr_ns1=-1 addr_nr_ns2=-1 \
-			run_tests $ns1 $ns2 dead:beef:1::1 slow
+		addr_nr_ns1=-1 addr_nr_ns2=-1 speed=slow \
+			run_tests $ns1 $ns2 dead:beef:1::1
 		chk_join_nr 2 2 2
 		chk_add_nr 1 1
 		chk_rm_nr 1 1
@@ -2647,7 +2670,8 @@ mixed_tests()
 		pm_nl_set_limits $ns1 0 1
 		pm_nl_set_limits $ns2 1 1
 		pm_nl_add_endpoint $ns1 dead:beef:2::1 flags signal
-		run_tests $ns1 $ns2 10.0.1.1 slow
+		speed=slow \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 0 0 0
 	fi
 
@@ -2657,7 +2681,8 @@ mixed_tests()
 		pm_nl_set_limits $ns1 0 1
 		pm_nl_set_limits $ns2 1 1
 		pm_nl_add_endpoint $ns1 10.0.1.1 flags signal
-		run_tests $ns1 $ns2 dead:beef:2::1 slow
+		speed=slow \
+			run_tests $ns1 $ns2 dead:beef:2::1
 		chk_join_nr 1 1 1
 	fi
 
@@ -2668,7 +2693,8 @@ mixed_tests()
 		pm_nl_set_limits $ns2 1 4
 		pm_nl_add_endpoint $ns2 dead:beef:2::2 flags subflow,fullmesh
 		pm_nl_add_endpoint $ns1 10.0.1.1 flags signal
-		run_tests $ns1 $ns2 dead:beef:2::1 slow
+		speed=slow \
+			run_tests $ns1 $ns2 dead:beef:2::1
 		chk_join_nr 1 1 1
 	fi
 
@@ -2680,8 +2706,8 @@ mixed_tests()
 		pm_nl_set_limits $ns2 2 4
 		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal
 		pm_nl_add_endpoint $ns1 dead:beef:2::1 flags signal
-		addr_nr_ns2=fullmesh_1 \
-			run_tests $ns1 $ns2 dead:beef:1::1 slow
+		fullmesh=1 speed=slow \
+			run_tests $ns1 $ns2 dead:beef:1::1
 		chk_join_nr 4 4 4
 	fi
 }
@@ -2694,8 +2720,8 @@ backup_tests()
 		pm_nl_set_limits $ns1 0 1
 		pm_nl_set_limits $ns2 0 1
 		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow,backup
-		sflags=nobackup \
-			run_tests $ns1 $ns2 10.0.1.1 slow
+		sflags=nobackup speed=slow \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 1 1 1
 		chk_prio_nr 0 1
 	fi
@@ -2706,8 +2732,8 @@ backup_tests()
 		pm_nl_set_limits $ns1 0 1
 		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal
 		pm_nl_set_limits $ns2 1 1
-		sflags=backup \
-			run_tests $ns1 $ns2 10.0.1.1 slow
+		sflags=backup speed=slow \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 1 1 1
 		chk_add_nr 1 1
 		chk_prio_nr 1 1
@@ -2719,8 +2745,8 @@ backup_tests()
 		pm_nl_set_limits $ns1 0 1
 		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal port 10100
 		pm_nl_set_limits $ns2 1 1
-		sflags=backup \
-			run_tests $ns1 $ns2 10.0.1.1 slow
+		sflags=backup speed=slow \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 1 1 1
 		chk_add_nr 1 1
 		chk_prio_nr 1 1
@@ -2729,7 +2755,8 @@ backup_tests()
 	if reset "mpc backup" &&
 	   continue_if mptcp_lib_kallsyms_doesnt_have "mptcp_subflow_send_ack$"; then
 		pm_nl_add_endpoint $ns2 10.0.1.2 flags subflow,backup
-		run_tests $ns1 $ns2 10.0.1.1 slow
+		speed=slow \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 0 0 0
 		chk_prio_nr 0 1
 	fi
@@ -2738,7 +2765,8 @@ backup_tests()
 	   continue_if mptcp_lib_kallsyms_doesnt_have "mptcp_subflow_send_ack$"; then
 		pm_nl_add_endpoint $ns1 10.0.1.1 flags subflow,backup
 		pm_nl_add_endpoint $ns2 10.0.1.2 flags subflow,backup
-		run_tests $ns1 $ns2 10.0.1.1 slow
+		speed=slow \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 0 0 0
 		chk_prio_nr 1 1
 	fi
@@ -2746,8 +2774,8 @@ backup_tests()
 	if reset "mpc switch to backup" &&
 	   continue_if mptcp_lib_kallsyms_doesnt_have "mptcp_subflow_send_ack$"; then
 		pm_nl_add_endpoint $ns2 10.0.1.2 flags subflow
-		sflags=backup \
-			run_tests $ns1 $ns2 10.0.1.1 slow
+		sflags=backup speed=slow \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 0 0 0
 		chk_prio_nr 0 1
 	fi
@@ -2756,8 +2784,8 @@ backup_tests()
 	   continue_if mptcp_lib_kallsyms_doesnt_have "mptcp_subflow_send_ack$"; then
 		pm_nl_add_endpoint $ns1 10.0.1.1 flags subflow
 		pm_nl_add_endpoint $ns2 10.0.1.2 flags subflow
-		sflags=backup \
-			run_tests $ns1 $ns2 10.0.1.1 slow
+		sflags=backup speed=slow \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 0 0 0
 		chk_prio_nr 1 1
 	fi
@@ -2846,8 +2874,8 @@ add_addr_ports_tests()
 		pm_nl_set_limits $ns1 0 1
 		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal port 10100
 		pm_nl_set_limits $ns2 1 1
-		addr_nr_ns1=-1 \
-			run_tests $ns1 $ns2 10.0.1.1 slow
+		addr_nr_ns1=-1 speed=slow \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 1 1 1
 		chk_add_nr 1 1 1
 		chk_rm_nr 1 1 invert
@@ -2863,8 +2891,8 @@ add_addr_ports_tests()
 		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal port 10100
 		pm_nl_set_limits $ns2 1 2
 		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
-		addr_nr_ns1=-1 addr_nr_ns2=-1 \
-			run_tests $ns1 $ns2 10.0.1.1 slow
+		addr_nr_ns1=-1 addr_nr_ns2=-1 speed=slow \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 2 2 2
 		chk_add_nr 1 1 1
 		chk_rm_nr 1 1
@@ -2877,8 +2905,8 @@ add_addr_ports_tests()
 		pm_nl_set_limits $ns2 1 3
 		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
 		pm_nl_add_endpoint $ns2 10.0.4.2 flags subflow
-		addr_nr_ns1=-8 addr_nr_ns2=-2 \
-			run_tests $ns1 $ns2 10.0.1.1 slow
+		addr_nr_ns1=-8 addr_nr_ns2=-2 speed=slow \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 3 3 3
 		chk_add_nr 1 1
 		chk_rm_nr 1 3 invert simult
@@ -3080,8 +3108,8 @@ fullmesh_tests()
 		pm_nl_set_limits $ns2 1 4
 		pm_nl_add_endpoint $ns2 10.0.2.2 flags subflow,fullmesh
 		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow,fullmesh
-		addr_nr_ns1=1 \
-			run_tests $ns1 $ns2 10.0.1.1 slow
+		addr_nr_ns1=1 speed=slow \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 4 4 4
 		chk_add_nr 1 1
 	fi
@@ -3093,8 +3121,8 @@ fullmesh_tests()
 		pm_nl_set_limits $ns1 1 3
 		pm_nl_set_limits $ns2 1 3
 		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal
-		addr_nr_ns2=fullmesh_1 \
-			run_tests $ns1 $ns2 10.0.1.1 slow
+		fullmesh=1 speed=slow \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 3 3 3
 		chk_add_nr 1 1
 	fi
@@ -3106,8 +3134,8 @@ fullmesh_tests()
 		pm_nl_set_limits $ns1 2 5
 		pm_nl_set_limits $ns2 1 5
 		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal
-		addr_nr_ns2=fullmesh_2 \
-			run_tests $ns1 $ns2 10.0.1.1 slow
+		fullmesh=2 speed=slow \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 5 5 5
 		chk_add_nr 1 1
 	fi
@@ -3120,8 +3148,8 @@ fullmesh_tests()
 		pm_nl_set_limits $ns1 2 4
 		pm_nl_set_limits $ns2 1 4
 		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal
-		addr_nr_ns2=fullmesh_2 \
-			run_tests $ns1 $ns2 10.0.1.1 slow
+		fullmesh=2 speed=slow \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 4 4 4
 		chk_add_nr 1 1
 	fi
@@ -3132,8 +3160,8 @@ fullmesh_tests()
 		pm_nl_set_limits $ns1 4 4
 		pm_nl_add_endpoint $ns1 10.0.2.1 flags subflow
 		pm_nl_set_limits $ns2 4 4
-		addr_nr_ns2=1 sflags=fullmesh \
-			run_tests $ns1 $ns2 10.0.1.1 slow
+		addr_nr_ns2=1 sflags=fullmesh speed=slow \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 2 2 2
 		chk_rm_nr 0 1
 	fi
@@ -3144,8 +3172,8 @@ fullmesh_tests()
 		pm_nl_set_limits $ns1 4 4
 		pm_nl_add_endpoint $ns1 10.0.2.1 flags subflow,fullmesh
 		pm_nl_set_limits $ns2 4 4
-		addr_nr_ns2=fullmesh_1 sflags=nofullmesh \
-			run_tests $ns1 $ns2 10.0.1.1 slow
+		fullmesh=1 sflags=nofullmesh speed=slow \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 2 2 2
 		chk_rm_nr 0 1
 	fi
@@ -3156,8 +3184,8 @@ fullmesh_tests()
 		pm_nl_set_limits $ns1 4 4
 		pm_nl_add_endpoint $ns1 10.0.2.1 flags subflow
 		pm_nl_set_limits $ns2 4 4
-		addr_nr_ns2=1 sflags=backup,fullmesh \
-			run_tests $ns1 $ns2 10.0.1.1 slow
+		addr_nr_ns2=1 sflags=backup,fullmesh speed=slow \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 2 2 2
 		chk_prio_nr 0 1
 		chk_rm_nr 0 1
@@ -3169,8 +3197,8 @@ fullmesh_tests()
 		pm_nl_set_limits $ns1 4 4
 		pm_nl_set_limits $ns2 4 4
 		pm_nl_add_endpoint $ns2 10.0.2.2 flags subflow,backup,fullmesh
-		sflags=nobackup,nofullmesh \
-			run_tests $ns1 $ns2 10.0.1.1 slow
+		sflags=nobackup,nofullmesh speed=slow \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 2 2 2
 		chk_prio_nr 0 1
 		chk_rm_nr 0 1
@@ -3180,7 +3208,7 @@ fullmesh_tests()
 fastclose_tests()
 {
 	if reset_check_counter "fastclose test" "MPTcpExtMPFastcloseTx"; then
-		test_linkfail=1024 addr_nr_ns2=fastclose_client \
+		test_linkfail=1024 fastclose=client \
 			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 0 0 0
 		chk_fclose_nr 1 1
@@ -3188,7 +3216,7 @@ fastclose_tests()
 	fi
 
 	if reset_check_counter "fastclose server test" "MPTcpExtMPFastcloseRx"; then
-		test_linkfail=1024 addr_nr_ns2=fastclose_server \
+		test_linkfail=1024 fastclose=server \
 			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 0 0 0
 		chk_fclose_nr 1 1 invert
@@ -3345,8 +3373,8 @@ userspace_tests()
 		pm_nl_set_limits $ns1 1 1
 		pm_nl_set_limits $ns2 1 1
 		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
-		sflags=backup \
-			run_tests $ns1 $ns2 10.0.1.1 slow
+		sflags=backup speed=slow \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 1 1 0
 		chk_prio_nr 0 0
 	fi
@@ -3359,8 +3387,8 @@ userspace_tests()
 		pm_nl_set_limits $ns1 0 1
 		pm_nl_set_limits $ns2 0 1
 		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
-		addr_nr_ns2=-1 \
-			run_tests $ns1 $ns2 10.0.1.1 slow
+		addr_nr_ns2=-1 speed=slow \
+			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 0 0 0
 		chk_rm_nr 0 0
 	fi
@@ -3370,7 +3398,8 @@ userspace_tests()
 	   continue_if mptcp_lib_has_file '/proc/sys/net/mptcp/pm_type'; then
 		set_userspace_pm $ns1
 		pm_nl_set_limits $ns2 1 1
-		run_tests $ns1 $ns2 10.0.1.1 speed_10 &
+		speed=10 \
+			run_tests $ns1 $ns2 10.0.1.1 &
 		local tests_pid=$!
 		wait_mpj $ns1
 		userspace_pm_add_addr 10.0.2.1 10
@@ -3390,7 +3419,8 @@ userspace_tests()
 	   continue_if mptcp_lib_has_file '/proc/sys/net/mptcp/pm_type'; then
 		set_userspace_pm $ns2
 		pm_nl_set_limits $ns1 0 1
-		run_tests $ns1 $ns2 10.0.1.1 speed_10 &
+		speed=10 \
+			run_tests $ns1 $ns2 10.0.1.1 &
 		local tests_pid=$!
 		wait_mpj $ns2
 		userspace_pm_add_sf 10.0.3.2 20
@@ -3413,7 +3443,8 @@ endpoint_tests()
 		pm_nl_set_limits $ns1 2 2
 		pm_nl_set_limits $ns2 2 2
 		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal
-		run_tests $ns1 $ns2 10.0.1.1 slow 2>/dev/null &
+		speed=slow \
+			run_tests $ns1 $ns2 10.0.1.1 2>/dev/null &
 
 		wait_mpj $ns1
 		pm_nl_check_endpoint 1 "creation" \
@@ -3436,8 +3467,8 @@ endpoint_tests()
 		pm_nl_set_limits $ns1 1 1
 		pm_nl_set_limits $ns2 1 1
 		pm_nl_add_endpoint $ns2 10.0.2.2 id 2 dev ns2eth2 flags subflow
-		test_linkfail=4 \
-			run_tests $ns1 $ns2 10.0.1.1 speed_20 2>/dev/null &
+		test_linkfail=4 speed=20 \
+			run_tests $ns1 $ns2 10.0.1.1 2>/dev/null &
 
 		wait_mpj $ns2
 		chk_subflow_nr needtitle "before delete" 2