diff --git a/sysmocom/suites/4g/iperf3_bidir.py b/sysmocom/suites/4g/iperf3_bidir.py
index 73cb03b0..bfeb95f8 100755
--- a/sysmocom/suites/4g/iperf3_bidir.py
+++ b/sysmocom/suites/4g/iperf3_bidir.py
@@ -41,8 +41,7 @@ for n in range(0, nof_ue):
   epc.subscriber_add(ue[n])
 epc.start()
 
-for n in range(0, nof_ue):
-  enb.ue_add(ue[n])
+enb.ue_add(ue[0])
 enb.start(epc)
 
 print('waiting for ENB to connect to EPC...')
diff --git a/sysmocom/suites/4g/iperf3_dl.py b/sysmocom/suites/4g/iperf3_dl.py
index 3c6eb0fd..a8bcb644 100755
--- a/sysmocom/suites/4g/iperf3_dl.py
+++ b/sysmocom/suites/4g/iperf3_dl.py
@@ -41,8 +41,7 @@ for n in range(0, nof_ue):
   epc.subscriber_add(ue[n])
 epc.start()
 
-for n in range(0, nof_ue):
-  enb.ue_add(ue[n])
+enb.ue_add(ue[0])
 enb.start(epc)
 
 print('waiting for ENB to connect to EPC...')
diff --git a/sysmocom/suites/4g/iperf3_ul.py b/sysmocom/suites/4g/iperf3_ul.py
index 541b0d0b..f566ce22 100755
--- a/sysmocom/suites/4g/iperf3_ul.py
+++ b/sysmocom/suites/4g/iperf3_ul.py
@@ -41,8 +41,7 @@ for n in range(0, nof_ue):
   epc.subscriber_add(ue[n])
 epc.start()
 
-for n in range(0, nof_ue):
-  enb.ue_add(ue[n])
+enb.ue_add(ue[0])
 enb.start(epc)
 
 print('waiting for ENB to connect to EPC...')