diff --git a/app/code/Magento/Search/Controller/Adminhtml/Synonyms/Delete.php b/app/code/Magento/Search/Controller/Adminhtml/Synonyms/Delete.php
index bb476423692d1..9d8b612cefadf 100644
--- a/app/code/Magento/Search/Controller/Adminhtml/Synonyms/Delete.php
+++ b/app/code/Magento/Search/Controller/Adminhtml/Synonyms/Delete.php
@@ -60,16 +60,18 @@ public function execute()
                 /** @var \Magento\Search\Model\SynonymGroup $synGroupModel */
                 $synGroupModel = $this->synGroupRepository->get($id);
                 $this->synGroupRepository->delete($synGroupModel);
-                $this->messageManager->addSuccess(__('The synonym group has been deleted.'));
+                $this->messageManager->addSuccessMessage(__('The synonym group has been deleted.'));
             } catch (\Magento\Framework\Exception\LocalizedException $e) {
-                $this->messageManager->addError($e->getMessage());
+                $this->messageManager->addErrorMessage($e->getMessage());
                 $this->logger->error($e);
             } catch (\Exception $e) {
-                $this->messageManager->addError(__('An error was encountered while performing delete operation.'));
+                $this->messageManager->addErrorMessage(
+                    __('An error was encountered while performing delete operation.')
+                );
                 $this->logger->error($e);
             }
         } else {
-            $this->messageManager->addError(__('We can\'t find a synonym group to delete.'));
+            $this->messageManager->addErrorMessage(__('We can\'t find a synonym group to delete.'));
         }
 
         return $resultRedirect->setPath('*/*/');
diff --git a/app/code/Magento/Search/Controller/Adminhtml/Synonyms/Edit.php b/app/code/Magento/Search/Controller/Adminhtml/Synonyms/Edit.php
index 8eefc956e8aa5..adc4ecc52030a 100644
--- a/app/code/Magento/Search/Controller/Adminhtml/Synonyms/Edit.php
+++ b/app/code/Magento/Search/Controller/Adminhtml/Synonyms/Edit.php
@@ -65,7 +65,7 @@ public function execute()
 
         // 2. Initial checking
         if ($groupId && (!$synGroup->getGroupId())) {
-                $this->messageManager->addError(__('This synonyms group no longer exists.'));
+                $this->messageManager->addErrorMessage(__('This synonyms group no longer exists.'));
                 /** @var \Magento\Backend\Model\View\Result\Redirect $resultRedirect */
                 $resultRedirect = $this->resultRedirectFactory->create();
                 return $resultRedirect->setPath('*/*/');
diff --git a/app/code/Magento/Search/Controller/Adminhtml/Synonyms/MassDelete.php b/app/code/Magento/Search/Controller/Adminhtml/Synonyms/MassDelete.php
index 4add418d95325..f2770f77cc533 100644
--- a/app/code/Magento/Search/Controller/Adminhtml/Synonyms/MassDelete.php
+++ b/app/code/Magento/Search/Controller/Adminhtml/Synonyms/MassDelete.php
@@ -72,17 +72,17 @@ public function execute()
                 $this->synGroupRepository->delete($synonymGroup);
                 $deletedItems++;
             } catch (\Exception $e) {
-                $this->messageManager->addError($e->getMessage());
+                $this->messageManager->addErrorMessage($e->getMessage());
             }
         }
         if ($deletedItems != 0) {
             if ($collectionSize != $deletedItems) {
-                $this->messageManager->addError(
+                $this->messageManager->addErrorMessage(
                     __('Failed to delete %1 synonym group(s).', $collectionSize - $deletedItems)
                 );
             }
 
-            $this->messageManager->addSuccess(
+            $this->messageManager->addSuccessMessage(
                 __('A total of %1 synonym group(s) have been deleted.', $deletedItems)
             );
         }
diff --git a/app/code/Magento/Search/Controller/Adminhtml/Synonyms/Save.php b/app/code/Magento/Search/Controller/Adminhtml/Synonyms/Save.php
index ffa97ceb3e0e1..0ed73fd0cee32 100644
--- a/app/code/Magento/Search/Controller/Adminhtml/Synonyms/Save.php
+++ b/app/code/Magento/Search/Controller/Adminhtml/Synonyms/Save.php
@@ -59,7 +59,7 @@ public function execute()
             $synGroup = $this->synGroupRepository->get($synGroupId);
 
             if (!$synGroup->getGroupId() && $synGroupId) {
-                $this->messageManager->addError(__('This synonym group no longer exists.'));
+                $this->messageManager->addErrorMessage(__('This synonym group no longer exists.'));
                 return $resultRedirect->setPath('*/*/');
             }
 
diff --git a/app/code/Magento/Search/Controller/Adminhtml/Term/Delete.php b/app/code/Magento/Search/Controller/Adminhtml/Term/Delete.php
index 3a1b80df2ea7e..c7adf32da0fb0 100644
--- a/app/code/Magento/Search/Controller/Adminhtml/Term/Delete.php
+++ b/app/code/Magento/Search/Controller/Adminhtml/Term/Delete.php
@@ -23,16 +23,16 @@ public function execute()
                 $model = $this->_objectManager->create(\Magento\Search\Model\Query::class);
                 $model->setId($id);
                 $model->delete();
-                $this->messageManager->addSuccess(__('You deleted the search.'));
+                $this->messageManager->addSuccessMessage(__('You deleted the search.'));
                 $resultRedirect->setPath('search/*/');
                 return $resultRedirect;
             } catch (\Exception $e) {
-                $this->messageManager->addError($e->getMessage());
+                $this->messageManager->addErrorMessage($e->getMessage());
                 $resultRedirect->setPath('search/*/edit', ['id' => $this->getRequest()->getParam('id')]);
                 return $resultRedirect;
             }
         }
-        $this->messageManager->addError(__('We can\'t find a search term to delete.'));
+        $this->messageManager->addErrorMessage(__('We can\'t find a search term to delete.'));
         $resultRedirect->setPath('search/*/');
         return $resultRedirect;
     }
diff --git a/app/code/Magento/Search/Controller/Adminhtml/Term/Edit.php b/app/code/Magento/Search/Controller/Adminhtml/Term/Edit.php
index 85e14ae9fe0b0..3ee0ea240377f 100644
--- a/app/code/Magento/Search/Controller/Adminhtml/Term/Edit.php
+++ b/app/code/Magento/Search/Controller/Adminhtml/Term/Edit.php
@@ -43,7 +43,7 @@ public function execute()
         if ($id) {
             $model->load($id);
             if (!$model->getId()) {
-                $this->messageManager->addError(__('This search no longer exists.'));
+                $this->messageManager->addErrorMessage(__('This search no longer exists.'));
                 /** @var \Magento\Backend\Model\View\Result\Redirect $resultRedirect */
                 $resultRedirect = $this->resultFactory->create(ResultFactory::TYPE_REDIRECT);
                 $resultRedirect->setPath('search/*');
diff --git a/app/code/Magento/Search/Controller/Adminhtml/Term/MassDelete.php b/app/code/Magento/Search/Controller/Adminhtml/Term/MassDelete.php
index b38d883b8faae..f6874078f2f64 100644
--- a/app/code/Magento/Search/Controller/Adminhtml/Term/MassDelete.php
+++ b/app/code/Magento/Search/Controller/Adminhtml/Term/MassDelete.php
@@ -17,16 +17,16 @@ public function execute()
     {
         $searchIds = $this->getRequest()->getParam('search');
         if (!is_array($searchIds)) {
-            $this->messageManager->addError(__('Please select searches.'));
+            $this->messageManager->addErrorMessage(__('Please select searches.'));
         } else {
             try {
                 foreach ($searchIds as $searchId) {
                     $model = $this->_objectManager->create(\Magento\Search\Model\Query::class)->load($searchId);
                     $model->delete();
                 }
-                $this->messageManager->addSuccess(__('Total of %1 record(s) were deleted.', count($searchIds)));
+                $this->messageManager->addSuccessMessage(__('Total of %1 record(s) were deleted.', count($searchIds)));
             } catch (\Exception $e) {
-                $this->messageManager->addError($e->getMessage());
+                $this->messageManager->addErrorMessage($e->getMessage());
             }
         }
         /** @var \Magento\Backend\Model\View\Result\Redirect $resultRedirect */
diff --git a/app/code/Magento/Search/Controller/Adminhtml/Term/Save.php b/app/code/Magento/Search/Controller/Adminhtml/Term/Save.php
index 42e9373a20fe2..cd9b1347ed1ed 100644
--- a/app/code/Magento/Search/Controller/Adminhtml/Term/Save.php
+++ b/app/code/Magento/Search/Controller/Adminhtml/Term/Save.php
@@ -45,12 +45,15 @@ public function execute()
                 $model->addData($data);
                 $model->setIsProcessed(0);
                 $model->save();
-                $this->messageManager->addSuccess(__('You saved the search term.'));
+                $this->messageManager->addSuccessMessage(__('You saved the search term.'));
             } catch (LocalizedException $e) {
-                $this->messageManager->addError($e->getMessage());
+                $this->messageManager->addErrorMessage($e->getMessage());
                 return $this->proceedToEdit($data);
             } catch (\Exception $e) {
-                $this->messageManager->addException($e, __('Something went wrong while saving the search query.'));
+                $this->messageManager->addExceptionMessage(
+                    $e,
+                    __('Something went wrong while saving the search query.')
+                );
                 return $this->proceedToEdit($data);
             }
         }
diff --git a/app/code/Magento/Search/Test/Unit/Controller/Adminhtml/Synonyms/DeleteTest.php b/app/code/Magento/Search/Test/Unit/Controller/Adminhtml/Synonyms/DeleteTest.php
index a7f71941dc6b2..38c78b986faf4 100644
--- a/app/code/Magento/Search/Test/Unit/Controller/Adminhtml/Synonyms/DeleteTest.php
+++ b/app/code/Magento/Search/Test/Unit/Controller/Adminhtml/Synonyms/DeleteTest.php
@@ -107,10 +107,10 @@ public function testDeleteAction()
         $this->repository->expects($this->once())->method('get')->with(10)->willReturn($this->synonymGroupMock);
 
         $this->messageManagerMock->expects($this->once())
-            ->method('addSuccess')
+            ->method('addSuccessMessage')
             ->with(__('The synonym group has been deleted.'));
 
-        $this->messageManagerMock->expects($this->never())->method('addError');
+        $this->messageManagerMock->expects($this->never())->method('addErrorMessage');
 
         $this->resultRedirectMock->expects($this->once())->method('setPath')->with('*/*/')->willReturnSelf();
 
@@ -124,10 +124,10 @@ public function testDeleteActionNoId()
             ->willReturn(null);
 
         $this->messageManagerMock->expects($this->once())
-            ->method('addError')
+            ->method('addErrorMessage')
             ->with(__('We can\'t find a synonym group to delete.'));
         $this->messageManagerMock->expects($this->never())
-            ->method('addSuccess');
+            ->method('addSuccessMessage');
 
         $this->resultRedirectMock->expects($this->once())
             ->method('setPath')
diff --git a/app/code/Magento/Search/Test/Unit/Controller/Adminhtml/Term/MassDeleteTest.php b/app/code/Magento/Search/Test/Unit/Controller/Adminhtml/Term/MassDeleteTest.php
index efda8f52fcfe9..60cc958a6187c 100644
--- a/app/code/Magento/Search/Test/Unit/Controller/Adminhtml/Term/MassDeleteTest.php
+++ b/app/code/Magento/Search/Test/Unit/Controller/Adminhtml/Term/MassDeleteTest.php
@@ -54,7 +54,7 @@ protected function setUp()
             ->getMockForAbstractClass();
         $this->messageManager = $this->getMockBuilder(\Magento\Framework\Message\ManagerInterface::class)
             ->disableOriginalConstructor()
-            ->setMethods(['addSuccess', 'addError'])
+            ->setMethods(['addSuccessMessage', 'addErrorMessage'])
             ->getMockForAbstractClass();
         $this->pageFactory = $this->getMockBuilder(\Magento\Framework\View\Result\PageFactory::class)
             ->setMethods([])
@@ -107,7 +107,7 @@ public function testExecute()
         $this->createQuery(0, 1);
         $this->createQuery(1, 2);
         $this->messageManager->expects($this->once())
-            ->method('addSuccess')
+            ->method('addSuccessMessage')
             ->will($this->returnSelf());
         $this->resultRedirectMock->expects($this->once())
             ->method('setPath')
diff --git a/app/code/Magento/Search/Test/Unit/Controller/Adminhtml/Term/SaveTest.php b/app/code/Magento/Search/Test/Unit/Controller/Adminhtml/Term/SaveTest.php
index 09ae2c38fe525..28f4b65cd412f 100644
--- a/app/code/Magento/Search/Test/Unit/Controller/Adminhtml/Term/SaveTest.php
+++ b/app/code/Magento/Search/Test/Unit/Controller/Adminhtml/Term/SaveTest.php
@@ -75,7 +75,7 @@ protected function setUp()
 
         $this->messageManager = $this->getMockBuilder(\Magento\Framework\Message\ManagerInterface::class)
             ->disableOriginalConstructor()
-            ->setMethods(['addSuccess', 'addError', 'addException'])
+            ->setMethods(['addSuccessMessage', 'addErrorMessage', 'addExceptionMessage'])
             ->getMockForAbstractClass();
         $this->context->expects($this->any())
             ->method('getMessageManager')
@@ -143,7 +143,7 @@ public function testExecuteLoadQueryQueryId()
         $this->query->expects($this->once())->method('getId')->willReturn(false);
         $this->query->expects($this->once())->method('load')->with($queryId);
 
-        $this->messageManager->expects($this->once())->method('addSuccess');
+        $this->messageManager->expects($this->once())->method('addSuccessMessage');
 
         $this->redirect->expects($this->once())->method('setPath')->willReturnSelf();
         $this->assertSame($this->redirect, $this->controller->execute());
@@ -161,7 +161,7 @@ public function testExecuteLoadQueryQueryIdQueryText()
         $this->query->expects($this->once())->method('loadByQueryText')->with($queryText);
         $this->query->expects($this->any())->method('getId')->willReturn($queryId);
 
-        $this->messageManager->expects($this->once())->method('addSuccess');
+        $this->messageManager->expects($this->once())->method('addSuccessMessage');
 
         $this->redirect->expects($this->once())->method('setPath')->willReturnSelf();
         $this->assertSame($this->redirect, $this->controller->execute());
@@ -180,7 +180,7 @@ public function testExecuteLoadQueryQueryIdQueryText2()
         $this->query->expects($this->any())->method('getId')->willReturn(false);
         $this->query->expects($this->once())->method('load')->with($queryId);
 
-        $this->messageManager->expects($this->once())->method('addSuccess');
+        $this->messageManager->expects($this->once())->method('addSuccessMessage');
 
         $this->redirect->expects($this->once())->method('setPath')->willReturnSelf();
         $this->assertSame($this->redirect, $this->controller->execute());
@@ -199,7 +199,7 @@ public function testExecuteLoadQueryQueryIdQueryTextException()
         $this->query->expects($this->once())->method('loadByQueryText')->with($queryText);
         $this->query->expects($this->any())->method('getId')->willReturn($anotherQueryId);
 
-        $this->messageManager->expects($this->once())->method('addError');
+        $this->messageManager->expects($this->once())->method('addErrorMessage');
         $this->session->expects($this->once())->method('setPageData');
         $this->redirect->expects($this->once())->method('setPath')->willReturnSelf();
         $this->assertSame($this->redirect, $this->controller->execute());
@@ -216,7 +216,7 @@ public function testExecuteException()
         $this->query->expects($this->once())->method('setStoreId');
         $this->query->expects($this->once())->method('loadByQueryText')->willThrowException(new \Exception());
 
-        $this->messageManager->expects($this->once())->method('addException');
+        $this->messageManager->expects($this->once())->method('addExceptionMessage');
         $this->session->expects($this->once())->method('setPageData');
         $this->redirect->expects($this->once())->method('setPath')->willReturnSelf();
         $this->assertSame($this->redirect, $this->controller->execute());
diff --git a/app/code/Magento/Security/Controller/Adminhtml/Session/LogoutAll.php b/app/code/Magento/Security/Controller/Adminhtml/Session/LogoutAll.php
index c533e740b2251..35d8f22d84d51 100644
--- a/app/code/Magento/Security/Controller/Adminhtml/Session/LogoutAll.php
+++ b/app/code/Magento/Security/Controller/Adminhtml/Session/LogoutAll.php
@@ -38,11 +38,11 @@ public function execute()
     {
         try {
             $this->sessionsManager->logoutOtherUserSessions();
-            $this->messageManager->addSuccess(__('All other open sessions for this account were terminated.'));
+            $this->messageManager->addSuccessMessage(__('All other open sessions for this account were terminated.'));
         } catch (\Magento\Framework\Exception\LocalizedException $e) {
-            $this->messageManager->addError($e->getMessage());
+            $this->messageManager->addErrorMessage($e->getMessage());
         } catch (\Exception $e) {
-            $this->messageManager->addException($e, __("We couldn't logout because of an error."));
+            $this->messageManager->addExceptionMessage($e, __("We couldn't logout because of an error."));
         }
         $this->_redirect('*/*/activity');
     }
diff --git a/app/code/Magento/Security/Model/Plugin/AuthSession.php b/app/code/Magento/Security/Model/Plugin/AuthSession.php
index abec4dc7c29ef..01203caaa31cd 100644
--- a/app/code/Magento/Security/Model/Plugin/AuthSession.php
+++ b/app/code/Magento/Security/Model/Plugin/AuthSession.php
@@ -82,7 +82,7 @@ private function addUserLogoutNotification()
                 $this->sessionsManager->getCurrentSession()->getStatus()
             );
         } elseif ($message = $this->sessionsManager->getLogoutReasonMessage()) {
-            $this->messageManager->addError($message);
+            $this->messageManager->addErrorMessage($message);
         }
 
         return $this;
diff --git a/app/code/Magento/Security/Model/Plugin/LoginController.php b/app/code/Magento/Security/Model/Plugin/LoginController.php
index ab9c6e2857bce..ba1a18c4f0c06 100644
--- a/app/code/Magento/Security/Model/Plugin/LoginController.php
+++ b/app/code/Magento/Security/Model/Plugin/LoginController.php
@@ -53,7 +53,7 @@ public function beforeExecute(Login $login)
     {
         $logoutReasonCode = $this->securityCookie->getLogoutReasonCookie();
         if ($this->isLoginForm($login) && $logoutReasonCode >= 0) {
-            $this->messageManager->addError(
+            $this->messageManager->addErrorMessage(
                 $this->sessionsManager->getLogoutReasonMessageByStatus($logoutReasonCode)
             );
             $this->securityCookie->deleteLogoutReasonCookie();
diff --git a/app/code/Magento/Security/Test/Unit/Controller/Adminhtml/Session/LogoutAllTest.php b/app/code/Magento/Security/Test/Unit/Controller/Adminhtml/Session/LogoutAllTest.php
index 8c2119bde667e..fd991f46f958d 100644
--- a/app/code/Magento/Security/Test/Unit/Controller/Adminhtml/Session/LogoutAllTest.php
+++ b/app/code/Magento/Security/Test/Unit/Controller/Adminhtml/Session/LogoutAllTest.php
@@ -74,7 +74,7 @@ public function setUp()
 
         $this->messageManager = $this->getMockBuilder(\Magento\Framework\Message\ManagerInterface::class)
             ->disableOriginalConstructor()
-            ->setMethods(['addSuccess', 'addError', 'addException'])
+            ->setMethods(['addSuccessMessage', 'addErrorMessage', 'addExceptionMessage'])
             ->getMockForAbstractClass();
         $this->contextMock->expects($this->any())
             ->method('getMessageManager')
@@ -132,12 +132,12 @@ public function testExecute()
         $this->sessionsManager->expects($this->once())
             ->method('logoutOtherUserSessions');
         $this->messageManager->expects($this->once())
-            ->method('addSuccess')
+            ->method('addSuccessMessage')
             ->with($successMessage);
         $this->messageManager->expects($this->never())
-            ->method('addError');
+            ->method('addErrorMessage');
         $this->messageManager->expects($this->never())
-            ->method('addException');
+            ->method('addExceptionMessage');
         $this->responseMock->expects($this->once())
             ->method('setRedirect');
         $this->actionFlagMock->expects($this->once())
@@ -158,7 +158,7 @@ public function testExecuteLocalizedException()
             ->method('logoutOtherUserSessions')
             ->willThrowException(new LocalizedException($phrase));
         $this->messageManager->expects($this->once())
-            ->method('addError')
+            ->method('addErrorMessage')
             ->with($phrase);
         $this->controller->execute();
     }
@@ -173,7 +173,7 @@ public function testExecuteException()
             ->method('logoutOtherUserSessions')
             ->willThrowException(new \Exception());
         $this->messageManager->expects($this->once())
-            ->method('addException')
+            ->method('addSuccessMessageptionMessage')
             ->with(new \Exception(), $phrase);
         $this->controller->execute();
     }
diff --git a/app/code/Magento/Security/Test/Unit/Model/Plugin/AuthSessionTest.php b/app/code/Magento/Security/Test/Unit/Model/Plugin/AuthSessionTest.php
index 5cb06d6143023..0f7f590b71de4 100644
--- a/app/code/Magento/Security/Test/Unit/Model/Plugin/AuthSessionTest.php
+++ b/app/code/Magento/Security/Test/Unit/Model/Plugin/AuthSessionTest.php
@@ -112,7 +112,7 @@ public function testAroundProlongSessionIsNotActiveAndIsNotAjaxRequest()
             ->willReturn($errorMessage);
 
         $this->messageManagerMock->expects($this->once())
-            ->method('addError')
+            ->method('addErrorMessage')
             ->with($errorMessage);
 
         $this->model->aroundProlong($this->authSessionMock, $proceed);
diff --git a/app/code/Magento/Security/Test/Unit/Model/Plugin/LoginControllerTest.php b/app/code/Magento/Security/Test/Unit/Model/Plugin/LoginControllerTest.php
index 2bb2bc3cafac7..aa066e23f67cb 100644
--- a/app/code/Magento/Security/Test/Unit/Model/Plugin/LoginControllerTest.php
+++ b/app/code/Magento/Security/Test/Unit/Model/Plugin/LoginControllerTest.php
@@ -103,7 +103,7 @@ public function testBeforeExecute()
             ->willReturn($errorMessage);
 
         $this->messageManagerMock->expects($this->once())
-            ->method('addError')
+            ->method('addErrorMessage')
             ->with($errorMessage);
 
         $this->securityCookieMock->expects($this->once())
diff --git a/app/code/Magento/Sitemap/Controller/Adminhtml/Sitemap/Delete.php b/app/code/Magento/Sitemap/Controller/Adminhtml/Sitemap/Delete.php
index 422fed9d9a688..29d50ea8408fd 100644
--- a/app/code/Magento/Sitemap/Controller/Adminhtml/Sitemap/Delete.php
+++ b/app/code/Magento/Sitemap/Controller/Adminhtml/Sitemap/Delete.php
@@ -65,20 +65,20 @@ public function execute()
                 }
                 $sitemap->delete();
                 // display success message
-                $this->messageManager->addSuccess(__('You deleted the sitemap.'));
+                $this->messageManager->addSuccessMessage(__('You deleted the sitemap.'));
                 // go to grid
                 $this->_redirect('adminhtml/*/');
                 return;
             } catch (\Exception $e) {
                 // display error message
-                $this->messageManager->addError($e->getMessage());
+                $this->messageManager->addErrorMessage($e->getMessage());
                 // go back to edit form
                 $this->_redirect('adminhtml/*/edit', ['sitemap_id' => $id]);
                 return;
             }
         }
         // display error message
-        $this->messageManager->addError(__('We can\'t find a sitemap to delete.'));
+        $this->messageManager->addErrorMessage(__('We can\'t find a sitemap to delete.'));
         // go to grid
         $this->_redirect('adminhtml/*/');
     }
diff --git a/app/code/Magento/Sitemap/Controller/Adminhtml/Sitemap/Edit.php b/app/code/Magento/Sitemap/Controller/Adminhtml/Sitemap/Edit.php
index 04ab4f8725e0e..111353550b9cd 100644
--- a/app/code/Magento/Sitemap/Controller/Adminhtml/Sitemap/Edit.php
+++ b/app/code/Magento/Sitemap/Controller/Adminhtml/Sitemap/Edit.php
@@ -41,7 +41,7 @@ public function execute()
         if ($id) {
             $model->load($id);
             if (!$model->getId()) {
-                $this->messageManager->addError(__('This sitemap no longer exists.'));
+                $this->messageManager->addErrorMessage(__('This sitemap no longer exists.'));
                 $this->_redirect('adminhtml/*/');
                 return;
             }
diff --git a/app/code/Magento/Sitemap/Controller/Adminhtml/Sitemap/Generate.php b/app/code/Magento/Sitemap/Controller/Adminhtml/Sitemap/Generate.php
index d19b248c8008f..9592ab6f57c55 100644
--- a/app/code/Magento/Sitemap/Controller/Adminhtml/Sitemap/Generate.php
+++ b/app/code/Magento/Sitemap/Controller/Adminhtml/Sitemap/Generate.php
@@ -52,18 +52,18 @@ public function execute()
                 );
                 $sitemap->generateXml();
 
-                $this->messageManager->addSuccess(
+                $this->messageManager->addSuccessMessage(
                     __('The sitemap "%1" has been generated.', $sitemap->getSitemapFilename())
                 );
             } catch (\Magento\Framework\Exception\LocalizedException $e) {
-                $this->messageManager->addError($e->getMessage());
+                $this->messageManager->addErrorMessage($e->getMessage());
             } catch (\Exception $e) {
-                $this->messageManager->addException($e, __('We can\'t generate the sitemap right now.'));
+                $this->messageManager->addExceptionMessage($e, __('We can\'t generate the sitemap right now.'));
             } finally {
                 $this->appEmulation->stopEnvironmentEmulation();
             }
         } else {
-            $this->messageManager->addError(__('We can\'t find a sitemap to generate.'));
+            $this->messageManager->addErrorMessage(__('We can\'t find a sitemap to generate.'));
         }
 
         // go to grid
diff --git a/app/code/Magento/Sitemap/Controller/Adminhtml/Sitemap/Save.php b/app/code/Magento/Sitemap/Controller/Adminhtml/Sitemap/Save.php
index 5c38cc68e6ef7..1e0d1cb248f00 100644
--- a/app/code/Magento/Sitemap/Controller/Adminhtml/Sitemap/Save.php
+++ b/app/code/Magento/Sitemap/Controller/Adminhtml/Sitemap/Save.php
@@ -30,7 +30,7 @@ protected function validatePath(array $data)
             $validator->setPaths($helper->getValidPaths());
             if (!$validator->isValid($path)) {
                 foreach ($validator->getMessages() as $message) {
-                    $this->messageManager->addError($message);
+                    $this->messageManager->addErrorMessage($message);
                 }
                 // save data in session
                 $this->_objectManager->get(\Magento\Backend\Model\Session::class)->setFormData($data);
@@ -83,13 +83,13 @@ protected function saveData($data)
             // save the data
             $model->save();
             // display success message
-            $this->messageManager->addSuccess(__('You saved the sitemap.'));
+            $this->messageManager->addSuccessMessage(__('You saved the sitemap.'));
             // clear previously saved data from session
             $this->_objectManager->get(\Magento\Backend\Model\Session::class)->setFormData(false);
             return $model->getId();
         } catch (\Exception $e) {
             // display error message
-            $this->messageManager->addError($e->getMessage());
+            $this->messageManager->addErrorMessage($e->getMessage());
             // save data in session
             $this->_objectManager->get(\Magento\Backend\Model\Session::class)->setFormData($data);
         }
diff --git a/app/code/Magento/Sitemap/Test/Unit/Controller/Adminhtml/Sitemap/SaveTest.php b/app/code/Magento/Sitemap/Test/Unit/Controller/Adminhtml/Sitemap/SaveTest.php
index 36e3aa0312627..f77954101df7c 100644
--- a/app/code/Magento/Sitemap/Test/Unit/Controller/Adminhtml/Sitemap/SaveTest.php
+++ b/app/code/Magento/Sitemap/Test/Unit/Controller/Adminhtml/Sitemap/SaveTest.php
@@ -154,7 +154,7 @@ public function testTryToSaveInvalidDataShouldFailWithErrors()
             ->willReturnMap([[$helperClass, $helper], [$sessionClass, $session]]);
 
         $this->messageManagerMock->expects($this->at(0))
-            ->method('addError')
+            ->method('addErrorMessage')
             ->withConsecutive(
                 [$messages[0]],
                 [$messages[1]]