diff --git a/pySim/transport/calypso.py b/pySim/transport/calypso.py
index ea97b696..98330a97 100644
--- a/pySim/transport/calypso.py
+++ b/pySim/transport/calypso.py
@@ -79,8 +79,10 @@ class CalypsoSimLink(LinkBase):
 
     def __init__(self, sock_path: str = "/tmp/osmocom_l2", **kwargs):
         super().__init__(**kwargs)
-        print("Using Calypso-based (OsmocomBB) reader interface")
-
+        if os.environ.get('PYSIM_INTEGRATION_TEST') == "1":
+            print("Using Calypso-based (OsmocomBB) reader interface")
+        else:
+            print("Using Calypso-based (OsmocomBB) reader at socket %s" % sock_path)
         # Make sure that a given socket path exists
         if not os.path.exists(sock_path):
             raise ReaderError(
diff --git a/pySim/transport/modem_atcmd.py b/pySim/transport/modem_atcmd.py
index fee09c8d..71f76e20 100644
--- a/pySim/transport/modem_atcmd.py
+++ b/pySim/transport/modem_atcmd.py
@@ -21,6 +21,7 @@ import serial
 import time
 import re
 import argparse
+import os
 from typing import Optional
 
 from pySim.utils import Hexstr, ResTuple
@@ -36,7 +37,10 @@ class ModemATCommandLink(LinkBase):
 
     def __init__(self, device: str = '/dev/ttyUSB0', baudrate: int = 115200, **kwargs):
         super().__init__(**kwargs)
-        print("Using modem for Generic SIM Access (3GPP TS 27.007)")
+        if os.environ.get('PYSIM_INTEGRATION_TEST') == "1":
+            print("Using modem for Generic SIM Access (3GPP TS 27.007)")
+        else:
+            print("Using modem for Generic SIM Access (3GPP TS 27.007) at port %s" % device)
         self._sl = serial.Serial(device, baudrate, timeout=5)
         self._echo = False		# this will be auto-detected by _check_echo()
         self._device = device
diff --git a/pySim/transport/pcsc.py b/pySim/transport/pcsc.py
index fbe7c0fc..762908c6 100644
--- a/pySim/transport/pcsc.py
+++ b/pySim/transport/pcsc.py
@@ -18,6 +18,7 @@
 #
 
 import argparse
+import os
 from typing import Optional
 
 from smartcard.CardConnection import CardConnection
@@ -35,7 +36,10 @@ class PcscSimLink(LinkBase):
 
     def __init__(self, reader_number: int = 0, **kwargs):
         super().__init__(**kwargs)
-        print("Using PC/SC reader interface")
+        if os.environ.get('PYSIM_INTEGRATION_TEST') == "1":
+            print("Using PC/SC reader interface")
+        else:
+            print("Using PC/SC reader number %u" % reader_number)
         r = readers()
         if reader_number >= len(r):
             raise ReaderError('No reader found for number %d' % reader_number)
diff --git a/pySim/transport/serial.py b/pySim/transport/serial.py
index 867317cf..ad800ede 100644
--- a/pySim/transport/serial.py
+++ b/pySim/transport/serial.py
@@ -18,7 +18,7 @@
 
 import serial
 import time
-import os.path
+import os
 import argparse
 from typing import Optional
 
@@ -33,7 +33,10 @@ class SerialSimLink(LinkBase):
     def __init__(self, device: str = '/dev/ttyUSB0', baudrate: int = 9600, rst: str = '-rts',
                  debug: bool = False, **kwargs):
         super().__init__(**kwargs)
-        print("Using serial reader interface")
+        if os.environ.get('PYSIM_INTEGRATION_TEST') == "1":
+            print("Using serial reader interface")
+        else:
+            print("Using serial reader interface at port %s" % device)
         if not os.path.exists(device):
             raise ValueError("device file %s does not exist -- abort" % device)
         self._sl = serial.Serial(
diff --git a/tests/pySim-prog_test.sh b/tests/pySim-prog_test.sh
index f5186188..28d97777 100755
--- a/tests/pySim-prog_test.sh
+++ b/tests/pySim-prog_test.sh
@@ -25,6 +25,7 @@ PYSIM_READ=../pySim-read.py
 TEMPFILE=temp.tmp
 PYTHON=python3
 
+export PYSIM_INTEGRATION_TEST=1
 set -e
 
 echo "pySim-prog_test - a test program to test pySim-prog.py"
diff --git a/tests/pySim-trace_test.sh b/tests/pySim-trace_test.sh
index 4ccb2aa8..f7b97e8b 100755
--- a/tests/pySim-trace_test.sh
+++ b/tests/pySim-trace_test.sh
@@ -24,6 +24,8 @@ PYSIM_TRACE=../pySim-trace.py
 GSMTAP_TRACE=pySim-trace_test_gsmtap.pcapng
 TEMPFILE=temp.tmp
 
+export PYSIM_INTEGRATION_TEST=1
+
 echo "pySim-trace_test - a test program to test pySim-trace.py"
 echo "========================================================"