diff --git a/tcp_tests/fixtures/underlay_fixtures.py b/tcp_tests/fixtures/underlay_fixtures.py
index 1770c62..a8856d6 100644
--- a/tcp_tests/fixtures/underlay_fixtures.py
+++ b/tcp_tests/fixtures/underlay_fixtures.py
@@ -18,9 +18,6 @@
 from tcp_tests.helpers import utils
 from tcp_tests import logger
 from tcp_tests import settings
-from tcp_tests.managers import envmanager_devops
-from tcp_tests.managers import envmanager_empty
-from tcp_tests.managers import envmanager_heat
 from tcp_tests.managers import underlay_ssh_manager
 
 LOG = logger.logger
@@ -60,18 +57,21 @@
         # No environment manager is used.
         # 'config' should contain config.underlay.ssh settings
         # 'config' should contain config.underlay.current_snapshot setting
+        from tcp_tests.managers import envmanager_empty
         env = envmanager_empty.EnvironmentManagerEmpty(config=config)
 
     elif env_manager == 'devops':
         # fuel-devops environment manager is used.
         # config.underlay.ssh settings can be empty or witn SSH to existing env
         # config.underlay.current_snapshot
+        from tcp_tests.managers import envmanager_devops
         env = envmanager_devops.EnvironmentManager(config=config)
 
     elif env_manager == 'heat':
         # heat environment manager is used.
         # config.underlay.ssh settings can be empty or witn SSH to existing env
         # config.underlay.current_snapshot
+        from tcp_tests.managers import envmanager_heat
         env = envmanager_heat.EnvironmentManagerHeat(config=config)
     else:
         raise Exception("Unknown hardware manager: '{}'".format(env_manager))