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]]