diff --git a/mistral/services/scheduler.py b/mistral/services/scheduler.py
index 25e21ee1..ec60742f 100644
--- a/mistral/services/scheduler.py
+++ b/mistral/services/scheduler.py
@@ -131,7 +131,7 @@ class CallScheduler(periodic_task.PeriodicTasks):
         for call in calls_to_make:
             LOG.debug('Processing next delayed call: %s', call)
 
-            context.set_ctx(context.MistralContext(call.auth_context))
+            target_auth_context = copy.deepcopy(call.auth_context)
 
             if call.factory_method_path:
                 factory = importutils.import_class(
@@ -157,19 +157,30 @@ class CallScheduler(periodic_task.PeriodicTasks):
 
                     method_args[arg_name] = deserialized
 
-            delayed_calls.append((target_method, method_args))
+            delayed_calls.append(
+                (target_auth_context, target_method, method_args)
+            )
+
+        for (target_auth_context, target_method, method_args) in delayed_calls:
 
-        for (target_method, method_args) in delayed_calls:
             # Transaction is needed here because some of the
             # target_method can use the DB
             with db_api.transaction():
                 try:
+                    # Set the correct context for the method.
+                    context.set_ctx(
+                        context.MistralContext(target_auth_context)
+                    )
+
                     # Call the method.
                     target_method(**method_args)
                 except Exception as e:
                     LOG.error(
                         "Delayed call failed [exception=%s]", e
                     )
+                finally:
+                    # Remove context.
+                    context.set_ctx(None)
 
         with db_api.transaction():
             for call in calls_to_make:
diff --git a/mistral/tests/unit/services/test_scheduler.py b/mistral/tests/unit/services/test_scheduler.py
index 0c8b9c16..af33cd16 100644
--- a/mistral/tests/unit/services/test_scheduler.py
+++ b/mistral/tests/unit/services/test_scheduler.py
@@ -17,6 +17,7 @@ import datetime
 import eventlet
 import mock
 
+from mistral import context as auth_context
 from mistral.db.v2 import api as db_api
 from mistral import exceptions as exc
 from mistral.services import scheduler
@@ -24,12 +25,21 @@ from mistral.tests.unit import base
 from mistral.workflow import utils as wf_utils
 
 
-FACTORY_METHOD_PATH = ('mistral.tests.unit.services.test_scheduler.'
-                       'factory_method')
-TARGET_METHOD_PATH = ('mistral.tests.unit.services.test_scheduler.'
-                      'target_method')
-FAILED_TO_SEND_TARGET_PATH = ('mistral.tests.unit.services.test_scheduler.'
-                              'failed_to_send')
+FACTORY_METHOD_PATH = (
+    'mistral.tests.unit.services.test_scheduler.factory_method'
+)
+TARGET_METHOD_PATH = (
+    'mistral.tests.unit.services.test_scheduler.target_method'
+)
+CHECK_CONTEXT_METHOD_PATH = (
+    'mistral.tests.unit.services.test_scheduler.target_check_context_method'
+)
+COMPARE_CONTEXT_METHOD_PATH = (
+    'mistral.tests.unit.services.test_scheduler.compare_context_values'
+)
+FAILED_TO_SEND_TARGET_PATH = (
+    'mistral.tests.unit.services.test_scheduler.failed_to_send'
+)
 
 DELAY = 1.5
 WAIT = DELAY * 3
@@ -47,6 +57,15 @@ def target_method():
     pass
 
 
+def compare_context_values(expected, actual):
+    pass
+
+
+def target_check_context_method(expected_project_id):
+    actual_project_id = auth_context.ctx()._BaseContext__values['project_id']
+    compare_context_values(expected_project_id, actual_project_id)
+
+
 def failed_to_send():
     raise exc.EngineException("Test")
 
@@ -128,6 +147,50 @@ class SchedulerServiceTest(base.DbTestCase):
 
         self.assertEqual(0, len(calls))
 
+    @mock.patch(COMPARE_CONTEXT_METHOD_PATH)
+    def test_scheduler_call_target_method_with_correct_auth(self, method):
+        default_context = base.get_context(default=True)
+        auth_context.set_ctx(default_context)
+        default_project_id = (
+            default_context._BaseContext__values['project_id']
+        )
+        method_args1 = {'expected_project_id': default_project_id}
+
+        scheduler.schedule_call(
+            None,
+            CHECK_CONTEXT_METHOD_PATH,
+            DELAY,
+            **method_args1
+        )
+
+        second_context = base.get_context(default=False)
+        auth_context.set_ctx(second_context)
+        second_project_id = (
+            second_context._BaseContext__values['project_id']
+        )
+        method_args2 = {'expected_project_id': second_project_id}
+
+        scheduler.schedule_call(
+            None,
+            CHECK_CONTEXT_METHOD_PATH,
+            DELAY,
+            **method_args2
+        )
+
+        eventlet.sleep(WAIT)
+
+        method.assert_any_call(
+            default_project_id,
+            default_project_id
+        )
+
+        method.assert_any_call(
+            second_project_id,
+            second_project_id
+        )
+
+        self.assertNotEqual(default_project_id, second_project_id)
+
     @mock.patch(FACTORY_METHOD_PATH)
     def test_scheduler_with_serializer(self, factory):
         target_method = 'run_something'