diff --git a/core/utils/device/simctl.py b/core/utils/device/simctl.py
index 336a739c..a30d8116 100644
--- a/core/utils/device/simctl.py
+++ b/core/utils/device/simctl.py
@@ -40,7 +40,7 @@ def is_running(simulator_info):
         for sim in sims:
             if sim['name'] == simulator_info.name and sim['state'] == 'Booted':
                 # simctl returns Booted too early, so we will wait some untill service is started
-                simulator_info.id = sim['udid']
+                simulator_info.id = str(sim['udid'])
                 command = 'spawn {0} launchctl print system | grep com.apple.springboard.services'.format(
                     simulator_info.id)
                 service_state = Simctl.__run_simctl_command(command=command)
@@ -72,7 +72,7 @@ def is_available(simulator_info):
         sims = Simctl.__get_simulators()['devices']['iOS {0}'.format(simulator_info.sdk)]
         for sim in sims:
             if sim['name'] == simulator_info.name:
-                simulator_info.id = sim['udid']
+                simulator_info.id = str(sim['udid'])
                 return simulator_info
         return False
 
diff --git a/tests/cli/run/device/device.py b/tests/cli/run/device/device.py
new file mode 100644
index 00000000..09b8cbd7
--- /dev/null
+++ b/tests/cli/run/device/device.py
@@ -0,0 +1,35 @@
+"""
+Tests for `tns devices` command
+"""
+import os
+import unittest
+
+from core.base_test.tns_run_test import TnsRunTest
+from core.enums.os_type import OSType
+from core.settings import Settings
+from products.nativescript.tns import Tns
+
+
+# noinspection PyMethodMayBeStatic
+class TnsDeviceTests(TnsRunTest):
+    PATH = os.environ.get('PATH')
+    ANDROID_HOME = os.environ.get('ANDROID_HOME')
+
+    def setUp(self):
+        TnsRunTest.setUp(self)
+        os.environ['PATH'] = self.PATH
+        os.environ['ANDROID_HOME'] = self.ANDROID_HOME
+
+    @unittest.skipIf(Settings.HOST_OS == OSType.WINDOWS, 'Skip on Windows machines.')
+    def test_400_list_devices_without_android_sdk(self):
+        path_without_android = ''
+        for path in self.PATH.split(':'):
+            if self.ANDROID_HOME not in path:
+                path_without_android = path_without_android + path + ':'
+        os.environ['PATH'] = path_without_android
+        os.environ['ANDROID_HOME'] = 'WRONG_PATH'
+        result = Tns.exec_command(command='devices')
+        assert self.emu.name in result.output
+        assert self.emu.id in result.output
+        assert self.sim.name in result.output
+        assert self.sim.id in result.output