diff --git a/heat/engine/clients/__init__.py b/heat/engine/clients/__init__.py
index b07652f4e9..71be4565ab 100644
--- a/heat/engine/clients/__init__.py
+++ b/heat/engine/clients/__init__.py
@@ -163,8 +163,7 @@ def initialise():
 
     _mgr = extension.ExtensionManager(
         namespace='heat.clients',
-        invoke_on_load=False,
-        verify_requirements=True)
+        invoke_on_load=False)
 
 
 def list_opts():
diff --git a/heat/engine/resources/__init__.py b/heat/engine/resources/__init__.py
index b639a7724e..d5079b7e44 100644
--- a/heat/engine/resources/__init__.py
+++ b/heat/engine/resources/__init__.py
@@ -37,8 +37,7 @@ def _register_stack_lifecycle_plugins(env, type_pairs):
 def _get_mapping(namespace):
     mgr = extension.ExtensionManager(
         namespace=namespace,
-        invoke_on_load=False,
-        verify_requirements=True)
+        invoke_on_load=False)
     return [[name, mgr[name].plugin] for name in mgr.names()]
 
 
diff --git a/heat/engine/template.py b/heat/engine/template.py
index 55d6c4be61..8de42c4a95 100644
--- a/heat/engine/template.py
+++ b/heat/engine/template.py
@@ -55,7 +55,6 @@ def _get_template_extension_manager():
     return extension.ExtensionManager(
         namespace='heat.templates',
         invoke_on_load=False,
-        verify_requirements=True,
         on_load_failure_callback=raise_extension_exception)