diff --git a/t/fixtures/ngcpcfg.cfg b/t/fixtures/ngcpcfg.cfg
index ea27d344..833e4e7a 100644
--- a/t/fixtures/ngcpcfg.cfg
+++ b/t/fixtures/ngcpcfg.cfg
@@ -34,4 +34,16 @@
 
 # validate configs using kwalify schema
 [ -n "${VALIDATE_SCHEMA:-}" ] || VALIDATE_SCHEMA="false"
+
+# file ownership and permissions for YML files
+[ -n "${CONFIG_USER:-}" ]            || CONFIG_USER="root"
+[ -n "${CONFIG_GROUP:-}" ]           || CONFIG_GROUP="_ngcp-admin"
+[ -n "${CONFIG_CHMOD:-}" ]           || CONFIG_CHMOD="0660"
+[ -n "${CONSTANTS_CONFIG_USER:-}" ]  || CONSTANTS_CONFIG_USER="root"
+[ -n "${CONSTANTS_CONFIG_GROUP:-}" ] || CONSTANTS_CONFIG_GROUP="root"
+[ -n "${CONSTANTS_CONFIG_CHMOD:-}" ] || CONSTANTS_CONFIG_CHMOD="0600"
+[ -n "${NETWORK_CONFIG_USER:-}" ]    || NETWORK_CONFIG_USER="root"
+[ -n "${NETWORK_CONFIG_GROUP:-}" ]   || NETWORK_CONFIG_GROUP="_ngcp-admin"
+[ -n "${NETWORK_CONFIG_CHMOD:-}" ]   || NETWORK_CONFIG_CHMOD="0660"
+
 ## END OF FILE #################################################################
diff --git a/t/fixtures/ngcpcfg_carrier.cfg b/t/fixtures/ngcpcfg_carrier.cfg
index 4695a7a0..8531b5fd 100644
--- a/t/fixtures/ngcpcfg_carrier.cfg
+++ b/t/fixtures/ngcpcfg_carrier.cfg
@@ -34,4 +34,16 @@
 
 # validate configs using kwalify schema
 [ -n "${VALIDATE_SCHEMA:-}" ] || VALIDATE_SCHEMA="false"
+
+# file ownership and permissions for YML files
+[ -n "${CONFIG_USER:-}" ]            || CONFIG_USER="root"
+[ -n "${CONFIG_GROUP:-}" ]           || CONFIG_GROUP="_ngcp-admin"
+[ -n "${CONFIG_CHMOD:-}" ]           || CONFIG_CHMOD="0660"
+[ -n "${CONSTANTS_CONFIG_USER:-}" ]  || CONSTANTS_CONFIG_USER="root"
+[ -n "${CONSTANTS_CONFIG_GROUP:-}" ] || CONSTANTS_CONFIG_GROUP="root"
+[ -n "${CONSTANTS_CONFIG_CHMOD:-}" ] || CONSTANTS_CONFIG_CHMOD="0600"
+[ -n "${NETWORK_CONFIG_USER:-}" ]    || NETWORK_CONFIG_USER="root"
+[ -n "${NETWORK_CONFIG_GROUP:-}" ]   || NETWORK_CONFIG_GROUP="_ngcp-admin"
+[ -n "${NETWORK_CONFIG_CHMOD:-}" ]   || NETWORK_CONFIG_CHMOD="0660"
+
 ## END OF FILE #################################################################
diff --git a/t/fixtures/ngcpcfg_network_interfaces.cfg b/t/fixtures/ngcpcfg_network_interfaces.cfg
index 58da0e5e..d1850004 100644
--- a/t/fixtures/ngcpcfg_network_interfaces.cfg
+++ b/t/fixtures/ngcpcfg_network_interfaces.cfg
@@ -34,4 +34,16 @@
 
 # validate configs using kwalify schema
 [ -n "${VALIDATE_SCHEMA:-}" ] || VALIDATE_SCHEMA="false"
+
+# file ownership and permissions for YML files
+[ -n "${CONFIG_USER:-}" ]            || CONFIG_USER="root"
+[ -n "${CONFIG_GROUP:-}" ]           || CONFIG_GROUP="_ngcp-admin"
+[ -n "${CONFIG_CHMOD:-}" ]           || CONFIG_CHMOD="0660"
+[ -n "${CONSTANTS_CONFIG_USER:-}" ]  || CONSTANTS_CONFIG_USER="root"
+[ -n "${CONSTANTS_CONFIG_GROUP:-}" ] || CONSTANTS_CONFIG_GROUP="root"
+[ -n "${CONSTANTS_CONFIG_CHMOD:-}" ] || CONSTANTS_CONFIG_CHMOD="0600"
+[ -n "${NETWORK_CONFIG_USER:-}" ]    || NETWORK_CONFIG_USER="root"
+[ -n "${NETWORK_CONFIG_GROUP:-}" ]   || NETWORK_CONFIG_GROUP="_ngcp-admin"
+[ -n "${NETWORK_CONFIG_CHMOD:-}" ]   || NETWORK_CONFIG_CHMOD="0660"
+
 ## END OF FILE #################################################################
diff --git a/t/fixtures/ngcpcfg_pro.cfg b/t/fixtures/ngcpcfg_pro.cfg
index eb0ed815..16a7cfe8 100644
--- a/t/fixtures/ngcpcfg_pro.cfg
+++ b/t/fixtures/ngcpcfg_pro.cfg
@@ -34,4 +34,16 @@
 
 # validate configs using kwalify schema
 [ -n "${VALIDATE_SCHEMA:-}" ] || VALIDATE_SCHEMA="false"
+
+# file ownership and permissions for YML files
+[ -n "${CONFIG_USER:-}" ]            || CONFIG_USER="root"
+[ -n "${CONFIG_GROUP:-}" ]           || CONFIG_GROUP="_ngcp-admin"
+[ -n "${CONFIG_CHMOD:-}" ]           || CONFIG_CHMOD="0660"
+[ -n "${CONSTANTS_CONFIG_USER:-}" ]  || CONSTANTS_CONFIG_USER="root"
+[ -n "${CONSTANTS_CONFIG_GROUP:-}" ] || CONSTANTS_CONFIG_GROUP="root"
+[ -n "${CONSTANTS_CONFIG_CHMOD:-}" ] || CONSTANTS_CONFIG_CHMOD="0600"
+[ -n "${NETWORK_CONFIG_USER:-}" ]    || NETWORK_CONFIG_USER="root"
+[ -n "${NETWORK_CONFIG_GROUP:-}" ]   || NETWORK_CONFIG_GROUP="_ngcp-admin"
+[ -n "${NETWORK_CONFIG_CHMOD:-}" ]   || NETWORK_CONFIG_CHMOD="0660"
+
 ## END OF FILE #################################################################
diff --git a/t/fixtures/programs.py b/t/fixtures/programs.py
index 47af2ffe..db893b3c 100644
--- a/t/fixtures/programs.py
+++ b/t/fixtures/programs.py
@@ -20,6 +20,15 @@ def ngcpcfgcli(tmpdir, *args):
             'PERL5LIB':  '../lib/',
             'NGCP_SOCKETFILE': '/tmp/ngcpcfg.socket',
             'NGCP_TESTSUITE': 'true',
+            'CONFIG_USER':  'nobody',
+            'CONFIG_GROUP': 'root',
+            'CONFIG_CHMOD': '0755',
+            'CONSTANTS_CONFIG_USER':  'nobody',
+            'CONSTANTS_CONFIG_GROUP': 'root',
+            'CONSTANTS_CONFIG_CHMOD': '0755',
+            'NETWORK_CONFIG_USER':  'nobody',
+            'NETWORK_CONFIG_GROUP': 'root',
+            'NETWORK_CONFIG_CHMOD': '0755'
         }
         testenv.update(env)