diff --git a/osprofiler/drivers/messaging.py b/osprofiler/drivers/messaging.py
index 47a8a81..4acf4fb 100644
--- a/osprofiler/drivers/messaging.py
+++ b/osprofiler/drivers/messaging.py
@@ -13,22 +13,28 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from oslo_utils import importutils
+
 from osprofiler.drivers import base
 
 
 class Messaging(base.Driver):
-    def __init__(self, connection_str, messaging=None, context=None,
-                 transport=None, project=None, service=None,
-                 host=None, **kwargs):
+    def __init__(self, connection_str, project=None, service=None, host=None,
+                 context=None, conf=None, **kwargs):
         """Driver sending notifications via message queues."""
 
+        oslo_messaging = importutils.try_import("oslo_messaging")
+        if not oslo_messaging:
+            raise ValueError("Oslo.messaging library is required for "
+                             "messaging driver")
+
         super(Messaging, self).__init__(connection_str, project=project,
                                         service=service, host=host)
 
-        self.messaging = messaging
         self.context = context
 
-        self.client = messaging.Notifier(
+        transport = oslo_messaging.get_notification_transport(conf)
+        self.client = oslo_messaging.Notifier(
             transport, publisher_id=self.host, driver="messaging",
             topics=["profiler"], retry=0)
 
diff --git a/osprofiler/initializer.py b/osprofiler/initializer.py
index 84e56d8..6f66e3b 100644
--- a/osprofiler/initializer.py
+++ b/osprofiler/initializer.py
@@ -13,8 +13,6 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import oslo_messaging
-
 from osprofiler import notifier
 from osprofiler import web
 
@@ -30,17 +28,12 @@ def init_from_conf(conf, context, project, service, host):
                  running on.
     """
     connection_str = conf.profiler.connection_string
-    kwargs = {}
-    if connection_str.startswith("messaging"):
-        kwargs = {"messaging": oslo_messaging,
-                  "transport": oslo_messaging.get_notification_transport(conf)}
     _notifier = notifier.create(
         connection_str,
         context=context,
         project=project,
         service=service,
         host=host,
-        conf=conf,
-        **kwargs)
+        conf=conf)
     notifier.set(_notifier)
     web.enable(conf.profiler.hmac_keys)
diff --git a/osprofiler/tests/unit/drivers/test_base.py b/osprofiler/tests/unit/drivers/test_base.py
index 462559b..4bb5674 100644
--- a/osprofiler/tests/unit/drivers/test_base.py
+++ b/osprofiler/tests/unit/drivers/test_base.py
@@ -13,8 +13,6 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import mock
-
 from osprofiler.drivers import base
 from osprofiler.tests import test
 
@@ -55,10 +53,6 @@ class NotifierBaseTestCase(test.TestCase):
                           "Driver not found for connection string: "
                           "nonexisting://")
 
-    def test_plugins_are_imported(self):
-        base.get_driver("messaging://", mock.MagicMock(), "context",
-                        "transport", "host")
-
     def test_build_empty_tree(self):
         class C(base.Driver):
             @classmethod
diff --git a/osprofiler/tests/unit/drivers/test_messaging.py b/osprofiler/tests/unit/drivers/test_messaging.py
index ad59c73..9a2c0a3 100644
--- a/osprofiler/tests/unit/drivers/test_messaging.py
+++ b/osprofiler/tests/unit/drivers/test_messaging.py
@@ -21,20 +21,37 @@ from osprofiler.tests import test
 
 class MessagingTestCase(test.TestCase):
 
-    def test_init_and_notify(self):
+    @mock.patch("oslo_utils.importutils.try_import")
+    def test_init_no_oslo_messaging(self, try_import_mock):
+        try_import_mock.return_value = None
 
-        messaging = mock.MagicMock()
+        self.assertRaises(
+            ValueError, base.get_driver,
+            "messaging://", project="project", service="service",
+            host="host", context={})
+
+    @mock.patch("oslo_utils.importutils.try_import")
+    def test_init_and_notify(self, try_import_mock):
         context = "context"
         transport = "transport"
         project = "project"
         service = "service"
         host = "host"
 
-        notify_func = base.get_driver(
-            "messaging://", messaging, context, transport,
-            project, service, host).notify
+        # emulate dynamic load of oslo.messaging library
+        oslo_messaging_mock = mock.Mock()
+        try_import_mock.return_value = oslo_messaging_mock
 
-        messaging.Notifier.assert_called_once_with(
+        # mock oslo.messaging APIs
+        notifier_mock = mock.Mock()
+        oslo_messaging_mock.Notifier.return_value = notifier_mock
+        oslo_messaging_mock.get_notification_transport.return_value = transport
+
+        notify_func = base.get_driver(
+            "messaging://", project=project, service=service,
+            context=context, host=host).notify
+
+        oslo_messaging_mock.Notifier.assert_called_once_with(
             transport, publisher_id=host, driver="messaging",
             topics=["profiler"], retry=0)
 
@@ -46,10 +63,10 @@ class MessagingTestCase(test.TestCase):
         }
         notify_func(info)
 
-        messaging.Notifier().info.assert_called_once_with(
+        notifier_mock.info.assert_called_once_with(
             context, "profiler.service", info)
 
-        messaging.reset_mock()
+        notifier_mock.reset_mock()
         notify_func(info, context="my_context")
-        messaging.Notifier().info.assert_called_once_with(
+        notifier_mock.info.assert_called_once_with(
             "my_context", "profiler.service", info)
diff --git a/osprofiler/tests/unit/test_initializer.py b/osprofiler/tests/unit/test_initializer.py
new file mode 100644
index 0000000..abb69d3
--- /dev/null
+++ b/osprofiler/tests/unit/test_initializer.py
@@ -0,0 +1,43 @@
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+import mock
+import testtools
+
+from osprofiler import initializer
+
+
+class InitializerTestCase(testtools.TestCase):
+
+    @mock.patch("osprofiler.notifier.set")
+    @mock.patch("osprofiler.notifier.create")
+    @mock.patch("osprofiler.web.enable")
+    def test_initializer(self, web_enable_mock, notifier_create_mock,
+                         notifier_set_mock):
+        conf = mock.Mock()
+        conf.profiler.connection_string = "driver://"
+        conf.profiler.hmac_keys = "hmac_keys"
+        context = {}
+        project = "my-project"
+        service = "my-service"
+        host = "my-host"
+
+        notifier_mock = mock.Mock()
+        notifier_create_mock.return_value = notifier_mock
+
+        initializer.init_from_conf(conf, context, project, service, host)
+
+        notifier_create_mock.assert_called_once_with(
+            "driver://", context=context, project=project, service=service,
+            host=host, conf=conf)
+        notifier_set_mock.assert_called_once_with(notifier_mock)
+        web_enable_mock.assert_called_once_with("hmac_keys")
diff --git a/requirements.txt b/requirements.txt
index e38a9d8..dcb5bc8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,4 @@
 six>=1.9.0 # MIT
-oslo.messaging>=5.2.0 # Apache-2.0
 oslo.log>=3.11.0 # Apache-2.0
 oslo.utils>=3.16.0 # Apache-2.0
 WebOb>=1.6.0 # MIT