diff --git a/tobiko/tests/scenario/neutron/stacks.py b/tobiko/tests/scenario/neutron/_stacks.py
similarity index 88%
rename from tobiko/tests/scenario/neutron/stacks.py
rename to tobiko/tests/scenario/neutron/_stacks.py
index 260419910..e01576d6e 100644
--- a/tobiko/tests/scenario/neutron/stacks.py
+++ b/tobiko/tests/scenario/neutron/_stacks.py
@@ -16,8 +16,6 @@ from __future__ import absolute_import
 
 import os
 
-import six
-
 from tobiko import config
 from tobiko.openstack import heat
 from tobiko.openstack import neutron
@@ -112,17 +110,3 @@ class SecurityGroupsFixture(heat.HeatStackFixture):
     """
     #: Heat template file
     template = heat_template_file('security_groups.yaml')
-
-
-class KeyPairFixture(heat.HeatStackFixture):
-    template = heat_template_file('key_pair.yaml')
-    key_file = os.path.expanduser(CONF.tobiko.nova.key_file)
-
-    @property
-    def public_key(self):
-        with open(self.key_file + '.pub', 'r') as fd:
-            key = fd.read()
-            if not isinstance(key, six.string_types):
-                # on Python 3 must convert key to string
-                key = key.decode()
-            return key
diff --git a/tobiko/tests/scenario/neutron/test_floating_ip.py b/tobiko/tests/scenario/neutron/test_floating_ip.py
index bba61bac4..f3729269f 100644
--- a/tobiko/tests/scenario/neutron/test_floating_ip.py
+++ b/tobiko/tests/scenario/neutron/test_floating_ip.py
@@ -21,8 +21,9 @@ from tobiko.shell import ssh
 from tobiko.shell import sh
 from tobiko.openstack import heat
 from tobiko.openstack import neutron
+from tobiko.openstack import stacks
 from tobiko.tests import base
-from tobiko.tests.scenario.neutron import stacks
+from tobiko.tests.scenario.neutron import _stacks
 
 
 CONF = config.CONF
@@ -33,7 +34,7 @@ class FloatingIPFixture(heat.HeatStackFixture):
     """
 
     #: Heat template file
-    template = stacks.heat_template_file('floating_ip.yaml')
+    template = _stacks.heat_template_file('floating_ip.yaml')
 
     #: Floating IP network where the Neutron floating IP is created
     floating_network = CONF.tobiko.neutron.floating_network
@@ -59,11 +60,12 @@ class FloatingIPFixture(heat.HeatStackFixture):
     #: Heat stack for creating internal network with a router to floating
     #:  network
     internal_network_stack = tobiko.required_setup_fixture(
-        stacks.InternalNetworkFixture)
+        _stacks.InternalNetworkFixture)
 
     # --- class parameters ---
     #: Whenever port security on internal network is enable
-    key_pair_stack = tobiko.required_setup_fixture(stacks.KeyPairFixture)
+    key_pair_stack = tobiko.required_setup_fixture(
+        stacks.NovaKeyPairStackFixture)
     port_security_enabled = False
 
     #: Security groups to be associated to network ports
@@ -226,7 +228,7 @@ class FloatingIPWithPortSecurityFixture(FloatingIPFixture):
 
     #: Resources stack with security group to allow ping Nova servers
     security_groups_stack = tobiko.required_setup_fixture(
-        stacks.SecurityGroupsFixture)
+        _stacks.SecurityGroupsFixture)
 
     #: Enable port security on internal network
     port_security_enabled = True
@@ -310,7 +312,7 @@ class FloatingIPWithNetMtuWritableFixture(FloatingIPFixture):
 
     #: Heat stack for creating internal network with custom MTU value
     internal_network_stack = tobiko.required_setup_fixture(
-        stacks.InternalNetworkWithNetMtuWritableFixture)
+        _stacks.InternalNetworkWithNetMtuWritableFixture)
 
 
 @neutron.skip_if_missing_networking_extensions('net-mtu-writable')