diff --git a/src/osmo_gsm_tester/bts.py b/src/osmo_gsm_tester/bts.py
index 02e5df7..fac4fd2 100644
--- a/src/osmo_gsm_tester/bts.py
+++ b/src/osmo_gsm_tester/bts.py
@@ -32,15 +32,16 @@
     rac = None
     cellid = None
     bvci = None
+    defaults_cfg_name = None
 
 ##############
 # PROTECTED
 ##############
-    def __init__(self, suite_run, conf, name):
+    def __init__(self, suite_run, conf, name, defaults_cfg_name):
         super().__init__(log.C_RUN, name)
         self.suite_run = suite_run
         self.conf = conf
-
+        self.defaults_cfg_name = defaults_cfg_name
 ########################
 # PUBLIC - INTERNAL API
 ########################
diff --git a/src/osmo_gsm_tester/bts_nanobts.py b/src/osmo_gsm_tester/bts_nanobts.py
index a930442..d631f1c 100644
--- a/src/osmo_gsm_tester/bts_nanobts.py
+++ b/src/osmo_gsm_tester/bts_nanobts.py
@@ -36,7 +36,7 @@
     def __init__(self, suite_run, conf):
         if conf.get('addr') is None:
             raise log.Error('No attribute addr provided in conf!')
-        super().__init__(suite_run, conf, 'nanobts_%s' % conf.get('addr'))
+        super().__init__(suite_run, conf, 'nanobts_%s' % conf.get('addr'), 'nanobts')
 
     def _configure(self):
         if self.bsc is None:
@@ -56,7 +56,7 @@
 ########################
 
     def conf_for_bsc(self):
-        values = self.conf_for_bsc_osmo('nanobts')
+        values = self.conf_for_bsc_prepare()
         # Hack until we have proper ARFCN resource allocation support (OS#2230)
         band = values.get('band')
         trx_list = values.get('trx_list')
diff --git a/src/osmo_gsm_tester/bts_octphy.py b/src/osmo_gsm_tester/bts_octphy.py
index 70deba3..1c4b4a0 100644
--- a/src/osmo_gsm_tester/bts_octphy.py
+++ b/src/osmo_gsm_tester/bts_octphy.py
@@ -36,7 +36,7 @@
     CONF_BTS_OCTPHY = 'osmo-bts-octphy.cfg'
 
     def __init__(self, suite_run, conf):
-        super().__init__(suite_run, conf, OsmoBtsOctphy.BIN_BTS_OCTPHY)
+        super().__init__(suite_run, conf, OsmoBtsOctphy.BIN_BTS_OCTPHY, 'osmo_bts_octphy')
         self.env = {}
         self.values = {}
 
@@ -112,7 +112,7 @@
 # PUBLIC - INTERNAL API
 ########################
     def conf_for_bsc(self):
-        values = self.conf_for_bsc_osmo('osmo_bts_octphy')
+        values = self.conf_for_bsc_prepare()
         self.dbg(conf=values)
         return values
 
diff --git a/src/osmo_gsm_tester/bts_osmo.py b/src/osmo_gsm_tester/bts_osmo.py
index d0ba557..8629b9b 100644
--- a/src/osmo_gsm_tester/bts_osmo.py
+++ b/src/osmo_gsm_tester/bts_osmo.py
@@ -30,14 +30,14 @@
 ##############
 # PROTECTED
 ##############
-    def __init__(self, suite_run, conf, name):
-        super().__init__(suite_run, conf, name)
+    def __init__(self, suite_run, conf, name, defaults_cfg_name):
+        super().__init__(suite_run, conf, name, defaults_cfg_name)
         if len(self.pcu_socket_path().encode()) > 107:
             raise log.Error('Path for pcu socket is longer than max allowed len for unix socket path (107):', self.pcu_socket_path())
 
-    def conf_for_bsc_osmo(self, bts_defaults_name):
+    def conf_for_bsc_prepare(self):
         values = config.get_defaults('bsc_bts')
-        config.overlay(values, config.get_defaults(bts_defaults_name))
+        config.overlay(values, config.get_defaults(self.defaults_cfg_name))
         if self.lac is not None:
             config.overlay(values, { 'location_area_code': self.lac })
         if self.rac is not None:
@@ -94,8 +94,8 @@
 ##############
     pcu_sk_tmp_dir = None
 
-    def __init__(self, suite_run, conf, name):
-        super().__init__(suite_run, conf, name)
+    def __init__(self, suite_run, conf, name, defaults_cfg_name):
+        super().__init__(suite_run, conf, name, defaults_cfg_name)
 
 ########################
 # PUBLIC - INTERNAL API
diff --git a/src/osmo_gsm_tester/bts_osmotrx.py b/src/osmo_gsm_tester/bts_osmotrx.py
index f1a9bdf..9f76194 100644
--- a/src/osmo_gsm_tester/bts_osmotrx.py
+++ b/src/osmo_gsm_tester/bts_osmotrx.py
@@ -38,7 +38,7 @@
     CONF_BTS_TRX = 'osmo-bts-trx.cfg'
 
     def __init__(self, suite_run, conf):
-        super().__init__(suite_run, conf, OsmoBtsTrx.BIN_BTS_TRX)
+        super().__init__(suite_run, conf, OsmoBtsTrx.BIN_BTS_TRX, 'osmo_bts_trx')
         self.env = {}
 
     def trx_remote_ip(self):
@@ -92,7 +92,7 @@
 # PUBLIC - INTERNAL API
 ########################
     def conf_for_bsc(self):
-        values = self.conf_for_bsc_osmo('osmo_bts_trx')
+        values = self.conf_for_bsc_prepare()
         self.dbg(conf=values)
         return values
 
diff --git a/src/osmo_gsm_tester/bts_sysmo.py b/src/osmo_gsm_tester/bts_sysmo.py
index c9978e5..d0f6ff3 100644
--- a/src/osmo_gsm_tester/bts_sysmo.py
+++ b/src/osmo_gsm_tester/bts_sysmo.py
@@ -35,7 +35,7 @@
     BTS_SYSMO_CFG = 'osmo-bts-sysmo.cfg'
 
     def __init__(self, suite_run, conf):
-        super().__init__(suite_run, conf, SysmoBts.BTS_SYSMO_BIN)
+        super().__init__(suite_run, conf, SysmoBts.BTS_SYSMO_BIN, 'osmo_bts_sysmo')
         self.remote_user = 'root'
 
     def _direct_pcu_enabled(self):
@@ -103,7 +103,7 @@
         return os.path.join(SysmoBts.REMOTE_DIR, 'pcu_bts')
 
     def conf_for_bsc(self):
-        values = self.conf_for_bsc_osmo('osmo_bts_sysmo')
+        values = self.conf_for_bsc_prepare()
         self.dbg(conf=values)
         return values