diff --git a/tests/module/Ieee80211_1.test b/tests/module/Ieee80211_1.test
index d0479d76317..e402e4fbca5 100644
--- a/tests/module/Ieee80211_1.test
+++ b/tests/module/Ieee80211_1.test
@@ -44,6 +44,9 @@ snapshot-file = "${resultdir}/${configname}-${runnumber}.sna"
 # mac
 **.contention.initialChannelBusy = false
 
+# radio medium
+*.radioMedium.sameTransmissionStartTimeCheck = "ignore"
+
 # radio
 **.radio.receiver.energyDetection = -100dBm
 
diff --git a/tests/module/Ieee80211_3.test b/tests/module/Ieee80211_3.test
index 6c279a2427e..af17f77d5a4 100644
--- a/tests/module/Ieee80211_3.test
+++ b/tests/module/Ieee80211_3.test
@@ -44,6 +44,9 @@ snapshot-file = "${resultdir}/${configname}-${runnumber}.sna"
 # mac
 **.contention.initialChannelBusy = false
 
+# radio medium
+*.radioMedium.sameTransmissionStartTimeCheck = "ignore"
+
 # radio
 **.radio.receiver.energyDetection = -100dBm
 
diff --git a/tests/module/Interference_APSKDimensionalRadio_Collision_SS_1.test b/tests/module/Interference_APSKDimensionalRadio_Collision_SS_1.test
index 33d741730cf..2a9e6ac92c7 100644
--- a/tests/module/Interference_APSKDimensionalRadio_Collision_SS_1.test
+++ b/tests/module/Interference_APSKDimensionalRadio_Collision_SS_1.test
@@ -55,6 +55,7 @@ snapshot-file = "${resultdir}/${configname}-${runnumber}.sna"
 
 # radio medium
 *.radioMedium.backgroundNoise.power = -110dBm
+*.radioMedium.sameTransmissionStartTimeCheck = "ignore"
 
 # nic
 *.host*.wlan[*].typename = "AckingWirelessInterface"
diff --git a/tests/module/Interference_APSKDimensionalRadio_Collision_SS_2.test b/tests/module/Interference_APSKDimensionalRadio_Collision_SS_2.test
index c7c52aa3616..0a8512fec3b 100644
--- a/tests/module/Interference_APSKDimensionalRadio_Collision_SS_2.test
+++ b/tests/module/Interference_APSKDimensionalRadio_Collision_SS_2.test
@@ -55,6 +55,7 @@ snapshot-file = "${resultdir}/${configname}-${runnumber}.sna"
 
 # radio medium
 *.radioMedium.backgroundNoise.power = -110dBm
+*.radioMedium.sameTransmissionStartTimeCheck = "ignore"
 
 # nic
 *.host*.wlan[*].typename = "AckingWirelessInterface"
diff --git a/tests/module/Interference_APSKDimensionalRadio_Collision_SW.test b/tests/module/Interference_APSKDimensionalRadio_Collision_SW.test
index 02ca2ff066a..a62a863c0a1 100644
--- a/tests/module/Interference_APSKDimensionalRadio_Collision_SW.test
+++ b/tests/module/Interference_APSKDimensionalRadio_Collision_SW.test
@@ -54,6 +54,7 @@ snapshot-file = "${resultdir}/${configname}-${runnumber}.sna"
 
 # radio medium
 *.radioMedium.backgroundNoise.power = -110dBm
+*.radioMedium.sameTransmissionStartTimeCheck = "ignore"
 
 # nic
 *.host*.wlan[*].typename = "AckingWirelessInterface"
diff --git a/tests/module/Interference_APSKDimensionalRadio_Collision_WS.test b/tests/module/Interference_APSKDimensionalRadio_Collision_WS.test
index 6092c9a807c..00b0e927d0f 100644
--- a/tests/module/Interference_APSKDimensionalRadio_Collision_WS.test
+++ b/tests/module/Interference_APSKDimensionalRadio_Collision_WS.test
@@ -54,6 +54,7 @@ snapshot-file = "${resultdir}/${configname}-${runnumber}.sna"
 
 # radio medium
 *.radioMedium.backgroundNoise.power = -110dBm
+*.radioMedium.sameTransmissionStartTimeCheck = "ignore"
 
 # nic
 *.host*.wlan[*].typename = "AckingWirelessInterface"
diff --git a/tests/module/Interference_APSKDimensionalRadio_Collision_WW.test b/tests/module/Interference_APSKDimensionalRadio_Collision_WW.test
index b0811d06b9d..34fdf89d845 100644
--- a/tests/module/Interference_APSKDimensionalRadio_Collision_WW.test
+++ b/tests/module/Interference_APSKDimensionalRadio_Collision_WW.test
@@ -53,6 +53,7 @@ snapshot-file = "${resultdir}/${configname}-${runnumber}.sna"
 
 # radio medium
 *.radioMedium.backgroundNoise.power = -110dBm
+*.radioMedium.sameTransmissionStartTimeCheck = "ignore"
 
 # nic
 *.host*.wlan[*].typename = "AckingWirelessInterface"
diff --git a/tests/module/Interference_APSKDimensionalRadio_Reception_SS.test b/tests/module/Interference_APSKDimensionalRadio_Reception_SS.test
index 3d0ffb08c52..4472bc19cf2 100644
--- a/tests/module/Interference_APSKDimensionalRadio_Reception_SS.test
+++ b/tests/module/Interference_APSKDimensionalRadio_Reception_SS.test
@@ -54,6 +54,7 @@ snapshot-file = "${resultdir}/${configname}-${runnumber}.sna"
 
 # radio medium
 *.radioMedium.backgroundNoise.power = -110dBm
+*.radioMedium.sameTransmissionStartTimeCheck = "ignore"
 
 # nic
 *.host*.wlan[*].typename = "AckingWirelessInterface"
diff --git a/tests/module/Interference_APSKDimensionalRadio_Reception_SW.test b/tests/module/Interference_APSKDimensionalRadio_Reception_SW.test
index bb83fe00138..2cca84f6057 100644
--- a/tests/module/Interference_APSKDimensionalRadio_Reception_SW.test
+++ b/tests/module/Interference_APSKDimensionalRadio_Reception_SW.test
@@ -54,6 +54,7 @@ snapshot-file = "${resultdir}/${configname}-${runnumber}.sna"
 
 # radio medium
 *.radioMedium.backgroundNoise.power = -110dBm
+*.radioMedium.sameTransmissionStartTimeCheck = "ignore"
 
 # nic
 *.host*.wlan[*].typename = "AckingWirelessInterface"
diff --git a/tests/module/Interference_APSKDimensionalRadio_Reception_WS.test b/tests/module/Interference_APSKDimensionalRadio_Reception_WS.test
index 6e631094de1..60884e6a17b 100644
--- a/tests/module/Interference_APSKDimensionalRadio_Reception_WS.test
+++ b/tests/module/Interference_APSKDimensionalRadio_Reception_WS.test
@@ -54,6 +54,7 @@ snapshot-file = "${resultdir}/${configname}-${runnumber}.sna"
 
 # radio medium
 *.radioMedium.backgroundNoise.power = -110dBm
+*.radioMedium.sameTransmissionStartTimeCheck = "ignore"
 
 # nic
 *.host*.wlan[*].typename = "AckingWirelessInterface"
diff --git a/tests/module/Interference_APSKScalarRadio_Collision_SS_1.test b/tests/module/Interference_APSKScalarRadio_Collision_SS_1.test
index 87bacd5203f..ef5f065c40b 100644
--- a/tests/module/Interference_APSKScalarRadio_Collision_SS_1.test
+++ b/tests/module/Interference_APSKScalarRadio_Collision_SS_1.test
@@ -55,6 +55,7 @@ snapshot-file = "${resultdir}/${configname}-${runnumber}.sna"
 
 # radio medium
 *.radioMedium.backgroundNoise.power = -110dBm
+*.radioMedium.sameTransmissionStartTimeCheck = "ignore"
 
 # nic
 *.host*.wlan[*].typename = "AckingWirelessInterface"
diff --git a/tests/module/Interference_APSKScalarRadio_Collision_SS_2.test b/tests/module/Interference_APSKScalarRadio_Collision_SS_2.test
index acc3fe0d9c3..ce2d1f23715 100644
--- a/tests/module/Interference_APSKScalarRadio_Collision_SS_2.test
+++ b/tests/module/Interference_APSKScalarRadio_Collision_SS_2.test
@@ -55,6 +55,7 @@ snapshot-file = "${resultdir}/${configname}-${runnumber}.sna"
 
 # radio medium
 *.radioMedium.backgroundNoise.power = -110dBm
+*.radioMedium.sameTransmissionStartTimeCheck = "ignore"
 
 # nic
 *.host*.wlan[*].typename = "AckingWirelessInterface"
diff --git a/tests/module/Interference_APSKScalarRadio_Collision_SW.test b/tests/module/Interference_APSKScalarRadio_Collision_SW.test
index e0535ce975e..f8a12a27717 100644
--- a/tests/module/Interference_APSKScalarRadio_Collision_SW.test
+++ b/tests/module/Interference_APSKScalarRadio_Collision_SW.test
@@ -54,6 +54,7 @@ snapshot-file = "${resultdir}/${configname}-${runnumber}.sna"
 
 # radio medium
 *.radioMedium.backgroundNoise.power = -110dBm
+*.radioMedium.sameTransmissionStartTimeCheck = "ignore"
 
 # nic
 *.host*.wlan[*].typename = "AckingWirelessInterface"
diff --git a/tests/module/Interference_APSKScalarRadio_Collision_WS.test b/tests/module/Interference_APSKScalarRadio_Collision_WS.test
index 0e73e65b142..69a9877841e 100644
--- a/tests/module/Interference_APSKScalarRadio_Collision_WS.test
+++ b/tests/module/Interference_APSKScalarRadio_Collision_WS.test
@@ -54,6 +54,7 @@ snapshot-file = "${resultdir}/${configname}-${runnumber}.sna"
 
 # radio medium
 *.radioMedium.backgroundNoise.power = -110dBm
+*.radioMedium.sameTransmissionStartTimeCheck = "ignore"
 
 # nic
 *.host*.wlan[*].typename = "AckingWirelessInterface"
diff --git a/tests/module/Interference_APSKScalarRadio_Collision_WW.test b/tests/module/Interference_APSKScalarRadio_Collision_WW.test
index 20ffc175206..702fa66c370 100644
--- a/tests/module/Interference_APSKScalarRadio_Collision_WW.test
+++ b/tests/module/Interference_APSKScalarRadio_Collision_WW.test
@@ -53,6 +53,7 @@ snapshot-file = "${resultdir}/${configname}-${runnumber}.sna"
 
 # radio medium
 *.radioMedium.backgroundNoise.power = -110dBm
+*.radioMedium.sameTransmissionStartTimeCheck = "ignore"
 
 # nic
 *.host*.wlan[*].typename = "AckingWirelessInterface"
diff --git a/tests/module/Interference_APSKScalarRadio_Reception_SS.test b/tests/module/Interference_APSKScalarRadio_Reception_SS.test
index bb1f68baf20..399812f0112 100644
--- a/tests/module/Interference_APSKScalarRadio_Reception_SS.test
+++ b/tests/module/Interference_APSKScalarRadio_Reception_SS.test
@@ -54,6 +54,7 @@ snapshot-file = "${resultdir}/${configname}-${runnumber}.sna"
 
 # radio medium
 *.radioMedium.backgroundNoise.power = -110dBm
+*.radioMedium.sameTransmissionStartTimeCheck = "ignore"
 
 # nic
 *.host*.wlan[*].typename = "AckingWirelessInterface"
diff --git a/tests/module/Interference_APSKScalarRadio_Reception_SW.test b/tests/module/Interference_APSKScalarRadio_Reception_SW.test
index 6f1c55b15a8..b75782aaa42 100644
--- a/tests/module/Interference_APSKScalarRadio_Reception_SW.test
+++ b/tests/module/Interference_APSKScalarRadio_Reception_SW.test
@@ -54,6 +54,7 @@ snapshot-file = "${resultdir}/${configname}-${runnumber}.sna"
 
 # radio medium
 *.radioMedium.backgroundNoise.power = -110dBm
+*.radioMedium.sameTransmissionStartTimeCheck = "ignore"
 
 # nic
 *.host*.wlan[*].typename = "AckingWirelessInterface"
diff --git a/tests/module/Interference_APSKScalarRadio_Reception_WS.test b/tests/module/Interference_APSKScalarRadio_Reception_WS.test
index 29365b29a96..9b0035d98cf 100644
--- a/tests/module/Interference_APSKScalarRadio_Reception_WS.test
+++ b/tests/module/Interference_APSKScalarRadio_Reception_WS.test
@@ -54,6 +54,7 @@ snapshot-file = "${resultdir}/${configname}-${runnumber}.sna"
 
 # radio medium
 *.radioMedium.backgroundNoise.power = -110dBm
+*.radioMedium.sameTransmissionStartTimeCheck = "ignore"
 
 # nic
 *.host*.wlan[*].typename = "AckingWirelessInterface"
diff --git a/tests/module/Interference_IdealRadio_Collision_SS_1.test b/tests/module/Interference_IdealRadio_Collision_SS_1.test
index be34ac111b2..fe2c31b01f4 100644
--- a/tests/module/Interference_IdealRadio_Collision_SS_1.test
+++ b/tests/module/Interference_IdealRadio_Collision_SS_1.test
@@ -53,6 +53,8 @@ snapshot-file = "${resultdir}/${configname}-${runnumber}.sna"
 *.hostSender2.mobility.initialX = 800m
 *.hostReceiver.mobility.initialX = 400m
 
+*.radioMedium.sameTransmissionStartTimeCheck = "ignore"
+
 # nic
 *.host*.wlan[*].typename = "AckingWirelessInterface"
 *.host*.wlan[*].bitrate = 2Mbps
diff --git a/tests/module/Interference_IdealRadio_Collision_SS_2.test b/tests/module/Interference_IdealRadio_Collision_SS_2.test
index d6f39a414ba..6a62f3a836c 100644
--- a/tests/module/Interference_IdealRadio_Collision_SS_2.test
+++ b/tests/module/Interference_IdealRadio_Collision_SS_2.test
@@ -53,6 +53,8 @@ snapshot-file = "${resultdir}/${configname}-${runnumber}.sna"
 *.hostSender2.mobility.initialX = 800m
 *.hostReceiver.mobility.initialX = 400m
 
+*.radioMedium.sameTransmissionStartTimeCheck = "ignore"
+
 # nic
 *.host*.wlan[*].typename = "AckingWirelessInterface"
 *.host*.wlan[*].bitrate = 2Mbps
diff --git a/tests/module/Interference_IdealRadio_Collision_SS_3.test b/tests/module/Interference_IdealRadio_Collision_SS_3.test
index f6c8cd14687..b9bc79ead88 100644
--- a/tests/module/Interference_IdealRadio_Collision_SS_3.test
+++ b/tests/module/Interference_IdealRadio_Collision_SS_3.test
@@ -50,6 +50,8 @@ snapshot-file = "${resultdir}/${configname}-${runnumber}.sna"
 *.hostSender2.mobility.initialX = 800m
 *.hostReceiver.mobility.initialX = 400m
 
+*.radioMedium.sameTransmissionStartTimeCheck = "ignore"
+
 # nic
 *.host*.wlan[*].typename = "AckingWirelessInterface"
 *.host*.wlan[*].bitrate = 2Mbps
diff --git a/tests/module/Interference_IdealRadio_Collision_SW.test b/tests/module/Interference_IdealRadio_Collision_SW.test
index b57686f0720..6f6322a953d 100644
--- a/tests/module/Interference_IdealRadio_Collision_SW.test
+++ b/tests/module/Interference_IdealRadio_Collision_SW.test
@@ -52,6 +52,8 @@ snapshot-file = "${resultdir}/${configname}-${runnumber}.sna"
 *.hostSender2.mobility.initialX = 800m
 *.hostReceiver.mobility.initialX = 400m
 
+*.radioMedium.sameTransmissionStartTimeCheck = "ignore"
+
 # nic
 *.host*.wlan[*].typename = "AckingWirelessInterface"
 *.host*.wlan[*].bitrate = 2Mbps
diff --git a/tests/module/Interference_IdealRadio_Collision_WS.test b/tests/module/Interference_IdealRadio_Collision_WS.test
index a94e9235bdd..a598f448484 100644
--- a/tests/module/Interference_IdealRadio_Collision_WS.test
+++ b/tests/module/Interference_IdealRadio_Collision_WS.test
@@ -52,6 +52,8 @@ snapshot-file = "${resultdir}/${configname}-${runnumber}.sna"
 *.hostSender2.mobility.initialX = 800m
 *.hostReceiver.mobility.initialX = 400m
 
+*.radioMedium.sameTransmissionStartTimeCheck = "ignore"
+
 # nic
 *.host*.wlan[*].typename = "AckingWirelessInterface"
 *.host*.wlan[*].bitrate = 2Mbps
diff --git a/tests/module/Interference_IdealRadio_Collision_WW.test b/tests/module/Interference_IdealRadio_Collision_WW.test
index 84da27b734c..929231894d8 100644
--- a/tests/module/Interference_IdealRadio_Collision_WW.test
+++ b/tests/module/Interference_IdealRadio_Collision_WW.test
@@ -51,6 +51,8 @@ snapshot-file = "${resultdir}/${configname}-${runnumber}.sna"
 *.hostSender2.mobility.initialX = 800m
 *.hostReceiver.mobility.initialX = 400m
 
+*.radioMedium.sameTransmissionStartTimeCheck = "ignore"
+
 # nic
 *.host*.wlan[*].typename = "AckingWirelessInterface"
 *.host*.wlan[*].bitrate = 2Mbps
diff --git a/tests/module/Interference_IdealRadio_Reception_SW.test b/tests/module/Interference_IdealRadio_Reception_SW.test
index f1cec8f8467..5b6ca187f33 100644
--- a/tests/module/Interference_IdealRadio_Reception_SW.test
+++ b/tests/module/Interference_IdealRadio_Reception_SW.test
@@ -52,6 +52,8 @@ snapshot-file = "${resultdir}/${configname}-${runnumber}.sna"
 *.hostSender2.mobility.initialX = 800m
 *.hostReceiver.mobility.initialX = 400m
 
+*.radioMedium.sameTransmissionStartTimeCheck = "ignore"
+
 # nic
 *.host*.wlan[*].typename = "AckingWirelessInterface"
 *.host*.wlan[*].bitrate = 2Mbps
diff --git a/tests/module/Interference_IdealRadio_Reception_WS.test b/tests/module/Interference_IdealRadio_Reception_WS.test
index 1328178c937..2ed29e27678 100644
--- a/tests/module/Interference_IdealRadio_Reception_WS.test
+++ b/tests/module/Interference_IdealRadio_Reception_WS.test
@@ -52,6 +52,8 @@ snapshot-file = "${resultdir}/${configname}-${runnumber}.sna"
 *.hostSender2.mobility.initialX = 800m
 *.hostReceiver.mobility.initialX = 400m
 
+*.radioMedium.sameTransmissionStartTimeCheck = "ignore"
+
 # nic
 *.host*.wlan[*].typename = "AckingWirelessInterface"
 *.host*.wlan[*].bitrate = 2Mbps
diff --git a/tests/module/NeighborCache_Grid.test b/tests/module/NeighborCache_Grid.test
index 234e28c37e1..54cd4483423 100644
--- a/tests/module/NeighborCache_Grid.test
+++ b/tests/module/NeighborCache_Grid.test
@@ -78,6 +78,9 @@ snapshot-file = "${resultdir}/${configname}-${runnumber}.sna"
 **.wlan[*].mac.rng-0 = 2
 ned-path = .;../../../../src;../../lib
 
+# radio medium
+*.radioMedium.sameTransmissionStartTimeCheck = "ignore"
+
 # channel physical parameters
 **.wlan[*].typename = "AckingWirelessInterface"
 **.wlan[*].bitrate = 2Mbps
diff --git a/tests/module/NeighborCache_NeighborList.test b/tests/module/NeighborCache_NeighborList.test
index a49979234e2..1bc933ede29 100644
--- a/tests/module/NeighborCache_NeighborList.test
+++ b/tests/module/NeighborCache_NeighborList.test
@@ -78,6 +78,9 @@ snapshot-file = "${resultdir}/${configname}-${runnumber}.sna"
 **.wlan[*].mac.rng-0 = 2
 ned-path = .;../../../../src;../../lib
 
+# radio medium
+*.radioMedium.sameTransmissionStartTimeCheck = "ignore"
+
 # channel physical parameters
 **.wlan[*].typename = "AckingWirelessInterface"
 **.wlan[*].bitrate = 2Mbps
diff --git a/tests/module/NeighborCache_Off.test b/tests/module/NeighborCache_Off.test
index f45b73cdd9e..590f251289f 100644
--- a/tests/module/NeighborCache_Off.test
+++ b/tests/module/NeighborCache_Off.test
@@ -78,6 +78,9 @@ snapshot-file = "${resultdir}/${configname}-${runnumber}.sna"
 **.wlan[*].mac.rng-0 = 2
 ned-path = .;../../../../src;../../lib
 
+# radio medium
+*.radioMedium.sameTransmissionStartTimeCheck = "ignore"
+
 # channel physical parameters
 **.wlan[*].typename = "AckingWirelessInterface"
 **.wlan[*].bitrate = 2Mbps
diff --git a/tests/module/NeighborCache_QuadTree.test b/tests/module/NeighborCache_QuadTree.test
index bfdc4a18988..5fb496d3332 100644
--- a/tests/module/NeighborCache_QuadTree.test
+++ b/tests/module/NeighborCache_QuadTree.test
@@ -78,6 +78,9 @@ snapshot-file = "${resultdir}/${configname}-${runnumber}.sna"
 **.wlan[*].mac.rng-0 = 2
 ned-path = .;../../../../src;../../lib
 
+# radio medium
+*.radioMedium.sameTransmissionStartTimeCheck = "ignore"
+
 # channel physical parameters
 **.wlan[*].typename = "AckingWirelessInterface"
 **.wlan[*].bitrate = 2Mbps