diff --git a/selftest/resource_test.ok b/selftest/resource_test.ok
index 884c6b3..3ec922b 100644
--- a/selftest/resource_test.ok
+++ b/selftest/resource_test.ok
@@ -222,6 +222,54 @@
 
 ~~~ end: currently reserved
 
+~~~ with modifiers:
+resources(testowner)={'arfcn': [{'_hash': 'e620569450f8259b3f0212ec19c285dd07df063c',
+            '_reserved_by': 'testowner-123-1490837279',
+            'arfcn': '512',
+            'band': 'GSM-1800'},
+           {'_hash': '022621e513c5a5bf33b77430a1e9c886be676fa1',
+            '_reserved_by': 'testowner-123-1490837279',
+            'arfcn': '514',
+            'band': 'GSM-1800'}],
+ 'bts': [{'_hash': 'd2aa7c1124943de352351b650ca0c751784da6b6',
+          '_reserved_by': 'testowner-123-1490837279',
+          'addr': '10.42.42.114',
+          'band': 'GSM-1800',
+          'ciphers': ['a5_0', 'a5_1'],
+          'direct_pcu': 'True',
+          'ipa_unit_id': '1',
+          'label': 'sysmoBTS 1002',
+          'type': 'osmo-bts-sysmo'},
+         {'_hash': '6a9c9fbd364e1563a5b9f0826030a7888fd19575',
+          '_reserved_by': 'testowner-123-1490837279',
+          'addr': '10.42.42.50',
+          'band': 'GSM-1800',
+          'ciphers': ['a5_0', 'a5_1'],
+          'ipa_unit_id': '6',
+          'label': 'Ettus B200',
+          'launch_trx': 'True',
+          'num_trx': 2,
+          'type': 'osmo-bts-trx'}],
+ 'ip_address': [{'_hash': 'fd103b22c7cf2480d609150e06f4bbd92ac78d8c',
+                 '_reserved_by': 'testowner-123-1490837279',
+                 'addr': '10.42.42.2'}],
+ 'modem': [{'_hash': '0b538cb6ad799fbd7c2953fd3b4463a76c7cc9c0',
+            '_reserved_by': 'testowner-123-1490837279',
+            'auth_algo': 'comp128v1',
+            'ciphers': ['a5_0', 'a5_1'],
+            'imsi': '901700000009031',
+            'ki': '80A37E6FDEA931EAC92FFA5F671EFEAD',
+            'label': 'sierra_1',
+            'path': '/sierra_1'},
+           {'_hash': '3a6e7747dfe7dfdf817bd3351031bd08051605c3',
+            '_reserved_by': 'testowner-123-1490837279',
+            'auth_algo': 'comp128v1',
+            'ciphers': ['a5_0', 'a5_1'],
+            'imsi': '901700000009029',
+            'ki': '00969E283349D354A8239E877F2E0866',
+            'label': 'sierra_2',
+            'path': '/sierra_2'}]}
+~~~ end: with modifiers:
 ~~~ currently reserved:
 {}
 
diff --git a/selftest/resource_test.py b/selftest/resource_test.py
index 52d8e47..cdfe021 100755
--- a/selftest/resource_test.py
+++ b/selftest/resource_test.py
@@ -77,16 +77,22 @@
        'arfcn': [ { 'band': 'GSM-1800', 'times': 2 } ],
        'modem': [ { 'times': 2 , 'ciphers': ['a5_0', 'a5_1']} ],
      }
-
+modifiers = {
+    'bts': [ {}, {'num_trx': 2 }],
+}
 origin = log.Origin(None, 'testowner')
 
-resources = pool.reserve(origin, config.replicate_times(want))
+resources = pool.reserve(origin, config.replicate_times(want), config.replicate_times(modifiers))
 
 print('~~~ currently reserved:')
 with open(rrfile, 'r') as f:
     print(f.read())
 print('~~~ end: currently reserved\n')
 
+print('~~~ with modifiers:')
+print(repr(resources))
+print('~~~ end: with modifiers:')
+
 resources.free()
 
 print('~~~ currently reserved:')
diff --git a/selftest/suite_test.ok b/selftest/suite_test.ok
index 79c37cc..b792b57 100644
--- a/selftest/suite_test.ok
+++ b/selftest/suite_test.ok
@@ -34,6 +34,8 @@
 tst test_suite: reserving resources in [PATH]/selftest/suite_test/test_work/state_dir ...
 tst test_suite: DBG: {combining='resources'}
 tst {combining_scenarios='resources'}: DBG: {definition_conf={bts=[{'label': 'sysmoCell 5000'}, {'label': 'sysmoCell 5000'}, {'type': 'sysmo'}], ip_address=[{}], modem=[{}, {}]}}  [test_suite↪{combining_scenarios='resources'}]
+tst test_suite: DBG: {combining='modifiers'}
+tst {combining_scenarios='modifiers'}: DBG: {definition_conf={}}  [test_suite↪{combining_scenarios='modifiers'}]
 tst test_suite: Reserving 3 x bts (candidates: 6)
 tst test_suite: DBG: Picked - _hash: 076ff06a4b719e61779492d3fb99f42a6635bb72
   addr: 10.42.42.53
@@ -177,6 +179,9 @@
 tst test_suite: DBG: {combining='resources'}  [suite.py:[LINENR]]
 tst {combining_scenarios='resources'}: DBG: {definition_conf={bts=[{'label': 'sysmoCell 5000'}, {'label': 'sysmoCell 5000'}, {'type': 'sysmo'}], ip_address=[{}], modem=[{}, {}]}}  [test_suite↪{combining_scenarios='resources'}]  [suite.py:[LINENR]]
 tst {combining_scenarios='resources', scenario='foo'}: [RESOURCE_DICT]
+tst test_suite: DBG: {combining='modifiers'}  [suite.py:[LINENR]]
+tst {combining_scenarios='modifiers'}: DBG: {definition_conf={}}  [test_suite↪{combining_scenarios='modifiers'}]  [suite.py:[LINENR]]
+tst {combining_scenarios='modifiers', scenario='foo'}: DBG: {conf={}, scenario='foo'}  [test_suite↪{combining_scenarios='modifiers', scenario='foo'}]  [suite.py:[LINENR]]
 tst test_suite: Reserving 3 x bts (candidates: 6)  [resource.py:[LINENR]]
 tst test_suite: DBG: Picked - _hash: 076ff06a4b719e61779492d3fb99f42a6635bb72
   addr: 10.42.42.53
@@ -255,6 +260,9 @@
 tst test_suite: DBG: {combining='resources'}  [suite.py:[LINENR]]
 tst {combining_scenarios='resources'}: DBG: {definition_conf={bts=[{'label': 'sysmoCell 5000'}, {'label': 'sysmoCell 5000'}, {'type': 'sysmo'}], ip_address=[{}], modem=[{}, {}]}}  [test_suite↪{combining_scenarios='resources'}]  [suite.py:[LINENR]]
 tst {combining_scenarios='resources', scenario='foo'}: [RESOURCE_DICT]
+tst test_suite: DBG: {combining='modifiers'}  [suite.py:[LINENR]]
+tst {combining_scenarios='modifiers'}: DBG: {definition_conf={}}  [test_suite↪{combining_scenarios='modifiers'}]  [suite.py:[LINENR]]
+tst {combining_scenarios='modifiers', scenario='foo'}: DBG: {conf={}, scenario='foo'}  [test_suite↪{combining_scenarios='modifiers', scenario='foo'}]  [suite.py:[LINENR]]
 tst test_suite: Reserving 3 x bts (candidates: 6)  [resource.py:[LINENR]]
 tst test_suite: DBG: Picked - _hash: 076ff06a4b719e61779492d3fb99f42a6635bb72
   addr: 10.42.42.53
@@ -322,5 +330,128 @@
     skip: test_error.py
     skip: test_fail.py
     skip: test_fail_raise.py
+- test with scenario and modifiers
+cnf ResourcesPool: DBG: Found config file resources.conf as [PATH]/selftest/suite_test/resources.conf in ./suite_test which is [PATH]/selftest/suite_test  [config.py:[LINENR]]
+cnf ResourcesPool: DBG: Found path state_dir as [PATH]/selftest/suite_test/test_work/state_dir  [config.py:[LINENR]]
+tst test_suite: reserving resources in [PATH]/selftest/suite_test/test_work/state_dir ...  [suite.py:[LINENR]]
+tst test_suite: DBG: {combining='resources'}  [suite.py:[LINENR]]
+tst {combining_scenarios='resources'}: DBG: {definition_conf={bts=[{'label': 'sysmoCell 5000'}, {'label': 'sysmoCell 5000'}, {'type': 'sysmo'}], ip_address=[{}], modem=[{}, {}]}}  [test_suite↪{combining_scenarios='resources'}]  [suite.py:[LINENR]]
+tst {combining_scenarios='resources', scenario='foo'}: [RESOURCE_DICT]
+tst test_suite: DBG: {combining='modifiers'}  [suite.py:[LINENR]]
+tst {combining_scenarios='modifiers'}: DBG: {definition_conf={}}  [test_suite↪{combining_scenarios='modifiers'}]  [suite.py:[LINENR]]
+tst {combining_scenarios='modifiers', scenario='foo'}: DBG: {conf={bts=[{'trx_list': [{'nominal_power': '20'}, {'nominal_power': '20'}]}, {'trx_list': [{'nominal_power': '20'}, {'nominal_power': '20'}]}, {'type': 'sysmo'}]}, scenario='foo'}  [test_suite↪{combining_scenarios='modifiers', scenario='foo'}]  [suite.py:[LINENR]]
+tst test_suite: Reserving 3 x bts (candidates: 6)  [resource.py:[LINENR]]
+tst test_suite: DBG: Picked - _hash: 076ff06a4b719e61779492d3fb99f42a6635bb72
+  addr: 10.42.42.53
+  band: GSM-1800
+  ipa_unit_id: '7'
+  label: sysmoCell 5000
+  trx_list:
+  - max_power_red: '3'
+    nominal_power: '10'
+  - max_power_red: '0'
+    nominal_power: '12'
+  trx_remote_ip: 10.42.42.112
+  type: osmo-bts-trx
+- _hash: 9eaa928b04ce04b19dbae972f9bfc3eea6f5e249
+  addr: 10.42.42.53
+  band: GSM-1800
+  ipa_unit_id: '7'
+  label: sysmoCell 5000
+  trx_list:
+  - nominal_power: '10'
+  - max_power_red: '1'
+    nominal_power: '12'
+  trx_remote_ip: 10.42.42.112
+  type: osmo-bts-trx
+- _hash: 07d9c8aaa940b674efcbbabdd69f58a6ce4e94f9
+  addr: 10.42.42.114
+  band: GSM-1800
+  ipa_unit_id: '1'
+  label: sysmoBTS 1002
+  type: sysmo
+  [resource.py:[LINENR]]
+tst test_suite: Reserving 1 x ip_address (candidates: 3)  [resource.py:[LINENR]]
+tst test_suite: DBG: Picked - _hash: cde1debf28f07f94f92c761b4b7c6bf35785ced4
+  addr: 10.42.42.1
+  [resource.py:[LINENR]]
+tst test_suite: Reserving 2 x modem (candidates: 16)  [resource.py:[LINENR]]
+tst test_suite: DBG: Picked - _hash: 19c69e45aa090fb511446bd00797690aa82ff52f
+  imsi: '901700000007801'
+  ki: D620F48487B1B782DA55DF6717F08FF9
+  label: m7801
+  path: /wavecom_0
+- _hash: e1a46516a1fb493b2617ab14fc1693a9a45ec254
+  imsi: '901700000007802'
+  ki: 47FDB2D55CE6A10A85ABDAD034A5B7B3
+  label: m7802
+  path: /wavecom_1
+  [resource.py:[LINENR]]
+resources(test_suite)={'bts': [{'_hash': '076ff06a4b719e61779492d3fb99f42a6635bb72',
+          '_reserved_by': 'test_suite-[ID_NUM]-[ID_NUM]',
+          'addr': '10.42.42.53',
+          'band': 'GSM-1800',
+          'ipa_unit_id': '7',
+          'label': 'sysmoCell 5000',
+          'trx_list': [{'max_power_red': '3', 'nominal_power': '20'},
+                       {'max_power_red': '0', 'nominal_power': '20'}],
+          'trx_remote_ip': '10.42.42.112',
+          'type': 'osmo-bts-trx'},
+         {'_hash': '9eaa928b04ce04b19dbae972f9bfc3eea6f5e249',
+          '_reserved_by': 'test_suite-[ID_NUM]-[ID_NUM]',
+          'addr': '10.42.42.53',
+          'band': 'GSM-1800',
+          'ipa_unit_id': '7',
+          'label': 'sysmoCell 5000',
+          'trx_list': [{'nominal_power': '20'},
+                       {'max_power_red': '1', 'nominal_power': '20'}],
+          'trx_remote_ip': '10.42.42.112',
+          'type': 'osmo-bts-trx'},
+         {'_hash': '07d9c8aaa940b674efcbbabdd69f58a6ce4e94f9',
+          '_reserved_by': 'test_suite-[ID_NUM]-[ID_NUM]',
+          'addr': '10.42.42.114',
+          'band': 'GSM-1800',
+          'ipa_unit_id': '1',
+          'label': 'sysmoBTS 1002',
+          'type': 'sysmo'}],
+ 'ip_address': [{'_hash': 'cde1debf28f07f94f92c761b4b7c6bf35785ced4',
+                 '_reserved_by': 'test_suite-[ID_NUM]-[ID_NUM]',
+                 'addr': '10.42.42.1'}],
+ 'modem': [{'_hash': '19c69e45aa090fb511446bd00797690aa82ff52f',
+            '_reserved_by': 'test_suite-[ID_NUM]-[ID_NUM]',
+            'imsi': '901700000007801',
+            'ki': 'D620F48487B1B782DA55DF6717F08FF9',
+            'label': 'm7801',
+            'path': '/wavecom_0'},
+           {'_hash': 'e1a46516a1fb493b2617ab14fc1693a9a45ec254',
+            '_reserved_by': 'test_suite-[ID_NUM]-[ID_NUM]',
+            'imsi': '901700000007802',
+            'ki': '47FDB2D55CE6A10A85ABDAD034A5B7B3',
+            'label': 'm7802',
+            'path': '/wavecom_1'}]}
+
+---------------------------------------------------------------------
+trial test_suite
+---------------------------------------------------------------------
+
+----------------------------------------------
+trial test_suite hello_world.py
+----------------------------------------------
+tst hello_world.py:[LINENR]: hello world  [test_suite↪hello_world.py:[LINENR]]  [hello_world.py:[LINENR]]
+tst hello_world.py:[LINENR]: I am 'test_suite' / 'hello_world.py:[LINENR]'  [test_suite↪hello_world.py:[LINENR]]  [hello_world.py:[LINENR]]
+tst hello_world.py:[LINENR]: one  [test_suite↪hello_world.py:[LINENR]]  [hello_world.py:[LINENR]]
+tst hello_world.py:[LINENR]: two  [test_suite↪hello_world.py:[LINENR]]  [hello_world.py:[LINENR]]
+tst hello_world.py:[LINENR]: three  [test_suite↪hello_world.py:[LINENR]]  [hello_world.py:[LINENR]]
+tst hello_world.py:[LINENR] Test passed (N.N sec)  [test_suite↪hello_world.py]  [test.py:[LINENR]]
+---------------------------------------------------------------------
+trial test_suite PASS
+---------------------------------------------------------------------
+PASS: test_suite (pass: 1, skip: 5)
+    pass: hello_world.py (N.N sec)
+    skip: mo_mt_sms.py
+    skip: mo_sms.py
+    skip: test_error.py
+    skip: test_fail.py
+    skip: test_fail_raise.py
 
 - graceful exit.
diff --git a/selftest/suite_test.ok.ign b/selftest/suite_test.ok.ign
index 49bd9eb..9bd168f 100644
--- a/selftest/suite_test.ok.ign
+++ b/selftest/suite_test.ok.ign
@@ -2,3 +2,4 @@
 \.py:[0-9]*	.py:[LINENR]
 \([0-9.]+ sec\)	(N.N sec)
 {combining_scenarios='resources', scenario='foo'}:.*	{combining_scenarios='resources', scenario='foo'}: [RESOURCE_DICT]
+test_suite-[0-9]*-[0-9]*	test_suite-[ID_NUM]-[ID_NUM]
diff --git a/selftest/suite_test.py b/selftest/suite_test.py
index a8b0f37..db19ccc 100755
--- a/selftest/suite_test.py
+++ b/selftest/suite_test.py
@@ -58,5 +58,16 @@
 results = s.run_tests('hello_world.py')
 print(report.suite_to_text(s))
 
+print('- test with scenario and modifiers')
+trial = log.Origin(log.C_TST, 'trial')
+scenario = config.Scenario('foo', 'bar')
+scenario['resources'] = { 'bts': [{ 'times': '2', 'type': 'osmo-bts-trx', 'trx_list': [{'nominal_power': '10'}, {'nominal_power': '12'}]}, {'type': 'sysmo'}] }
+scenario['modifiers'] = { 'bts': [{ 'times': '2', 'trx_list': [{'nominal_power': '20'}, {'nominal_power': '20'}]}, {'type': 'sysmo'}] }
+s = suite.SuiteRun(trial, 'test_suite', s_def, [scenario])
+s.reserve_resources()
+print(repr(s.reserved_resources))
+results = s.run_tests('hello_world.py')
+print(report.suite_to_text(s))
+
 print('\n- graceful exit.')
 # vim: expandtab tabstop=4 shiftwidth=4