diff --git a/java/java-tests/testSrc/com/intellij/java/codeInsight/OverrideImplementTest.groovy b/java/java-tests/testSrc/com/intellij/java/codeInsight/OverrideImplementTest.groovy
index 637b645cbf87..c872a19db05e 100644
--- a/java/java-tests/testSrc/com/intellij/java/codeInsight/OverrideImplementTest.groovy
+++ b/java/java-tests/testSrc/com/intellij/java/codeInsight/OverrideImplementTest.groovy
@@ -7,12 +7,12 @@ import com.intellij.codeInsight.generation.OverrideImplementUtil
 import com.intellij.codeInsight.generation.OverrideImplementsAnnotationsHandler
 import com.intellij.idea.ActionsBundle
 import com.intellij.openapi.actionSystem.Presentation
+import com.intellij.openapi.application.ApplicationManager
 import com.intellij.openapi.command.CommandProcessor
-import com.intellij.openapi.extensions.Extensions
 import com.intellij.openapi.project.Project
 import com.intellij.psi.PsiClass
 import com.intellij.psi.util.PsiTreeUtil
-import com.intellij.testFramework.PlatformTestUtil
+import com.intellij.testFramework.ServiceContainerUtil
 import com.intellij.testFramework.fixtures.LightJavaCodeInsightFixtureTestCase
 
 /**
@@ -273,7 +273,7 @@ class Test implements A {
   void testCustomOverrideImplementsHandler() throws Exception {
     myFixture.addClass """package a; public @interface A { String value();}"""
 
-    PlatformTestUtil.registerExtension(Extensions.getRootArea(), OverrideImplementsAnnotationsHandler.EP_NAME, new OverrideImplementsAnnotationsHandler() {
+    ServiceContainerUtil.registerExtension(ApplicationManager.application, OverrideImplementsAnnotationsHandler.EP_NAME, new OverrideImplementsAnnotationsHandler() {
       @Override
       String[] getAnnotations(Project project) {
         return ["a.A"]
diff --git a/java/java-tests/testSrc/com/intellij/java/codeInsight/daemon/quickFix/UseBulkOperationInspectionTest.java b/java/java-tests/testSrc/com/intellij/java/codeInsight/daemon/quickFix/UseBulkOperationInspectionTest.java
index 5ed1a05fd6ce..a233a35bf03a 100644
--- a/java/java-tests/testSrc/com/intellij/java/codeInsight/daemon/quickFix/UseBulkOperationInspectionTest.java
+++ b/java/java-tests/testSrc/com/intellij/java/codeInsight/daemon/quickFix/UseBulkOperationInspectionTest.java
@@ -1,18 +1,4 @@
-/*
- * Copyright 2000-2017 JetBrains s.r.o.
- *
- * 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.
- */
+// Copyright 2000-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 package com.intellij.java.codeInsight.daemon.quickFix;
 
 import com.intellij.codeInsight.daemon.quickFix.LightQuickFixParameterizedTestCase;
@@ -20,8 +6,8 @@ import com.intellij.codeInspection.LocalInspectionTool;
 import com.intellij.codeInspection.bulkOperation.BulkMethodInfo;
 import com.intellij.codeInspection.bulkOperation.BulkMethodInfoProvider;
 import com.intellij.codeInspection.bulkOperation.UseBulkOperationInspection;
-import com.intellij.openapi.extensions.Extensions;
-import com.intellij.testFramework.PlatformTestUtil;
+import com.intellij.openapi.application.ApplicationManager;
+import com.intellij.testFramework.ServiceContainerUtil;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.stream.Stream;
@@ -50,7 +36,7 @@ public class UseBulkOperationInspectionTest extends LightQuickFixParameterizedTe
   @Override
   protected void setUp() throws Exception {
     super.setUp();
-    PlatformTestUtil.registerExtension(Extensions.getRootArea(), BulkMethodInfoProvider.KEY, TEST_PROVIDER, getTestRootDisposable());
+    ServiceContainerUtil.registerExtension(ApplicationManager.getApplication(), BulkMethodInfoProvider.KEY, TEST_PROVIDER, getTestRootDisposable());
   }
 
   @Override
diff --git a/java/java-tests/testSrc/com/intellij/java/codeInspection/NotNullFieldNotInitializedInspectionTest.java b/java/java-tests/testSrc/com/intellij/java/codeInspection/NotNullFieldNotInitializedInspectionTest.java
index 65b48a201825..dac5be79537b 100644
--- a/java/java-tests/testSrc/com/intellij/java/codeInspection/NotNullFieldNotInitializedInspectionTest.java
+++ b/java/java-tests/testSrc/com/intellij/java/codeInspection/NotNullFieldNotInitializedInspectionTest.java
@@ -5,11 +5,11 @@ package com.intellij.java.codeInspection;
 import com.intellij.JavaTestUtil;
 import com.intellij.codeInsight.daemon.ImplicitUsageProvider;
 import com.intellij.codeInspection.nullable.NotNullFieldNotInitializedInspection;
-import com.intellij.openapi.extensions.Extensions;
+import com.intellij.openapi.application.ApplicationManager;
 import com.intellij.psi.PsiElement;
 import com.intellij.psi.PsiField;
 import com.intellij.testFramework.LightProjectDescriptor;
-import com.intellij.testFramework.PlatformTestUtil;
+import com.intellij.testFramework.ServiceContainerUtil;
 import com.intellij.testFramework.fixtures.LightJavaCodeInsightFixtureTestCase;
 import org.jetbrains.annotations.NotNull;
 
@@ -26,7 +26,7 @@ public class NotNullFieldNotInitializedInspectionTest extends LightJavaCodeInsig
     doTest();
   }
   public void testImplicit() {
-    PlatformTestUtil.registerExtension(Extensions.getRootArea(), ImplicitUsageProvider.EP_NAME, new ImplicitUsageProvider() {
+    ServiceContainerUtil.registerExtension(ApplicationManager.getApplication(), ImplicitUsageProvider.EP_NAME, new ImplicitUsageProvider() {
       @Override
       public boolean isImplicitUsage(@NotNull PsiElement element) {
         return false;
diff --git a/java/java-tests/testSrc/com/intellij/java/codeInspection/UnusedReturnValueQuickFixTest.java b/java/java-tests/testSrc/com/intellij/java/codeInspection/UnusedReturnValueQuickFixTest.java
index 59914d46b124..c3ee9cc5d51d 100644
--- a/java/java-tests/testSrc/com/intellij/java/codeInspection/UnusedReturnValueQuickFixTest.java
+++ b/java/java-tests/testSrc/com/intellij/java/codeInspection/UnusedReturnValueQuickFixTest.java
@@ -1,18 +1,4 @@
-/*
- * Copyright 2000-2017 JetBrains s.r.o.
- *
- * 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.
- */
+// Copyright 2000-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 package com.intellij.java.codeInspection;
 
 import com.intellij.JavaTestUtil;
@@ -22,13 +8,13 @@ import com.intellij.codeInspection.InspectionsBundle;
 import com.intellij.codeInspection.reference.EntryPoint;
 import com.intellij.codeInspection.reference.RefElement;
 import com.intellij.codeInspection.unusedReturnValue.UnusedReturnValue;
+import com.intellij.openapi.application.ApplicationManager;
 import com.intellij.openapi.extensions.ExtensionPointName;
-import com.intellij.openapi.extensions.Extensions;
 import com.intellij.openapi.util.InvalidDataException;
 import com.intellij.openapi.util.WriteExternalException;
 import com.intellij.psi.PsiElement;
 import com.intellij.psi.PsiMethod;
-import com.intellij.testFramework.PlatformTestUtil;
+import com.intellij.testFramework.ServiceContainerUtil;
 import com.intellij.testFramework.fixtures.LightJavaCodeInsightFixtureTestCase;
 import org.jdom.Element;
 import org.jetbrains.annotations.NotNull;
@@ -41,7 +27,7 @@ public class UnusedReturnValueQuickFixTest extends LightJavaCodeInsightFixtureTe
   @Override
   protected void setUp() throws Exception {
     super.setUp();
-    PlatformTestUtil.registerExtension(Extensions.getRootArea(), ImplicitUsageProvider.EP_NAME, new ImplicitUsageProvider() {
+    ServiceContainerUtil.registerExtension(ApplicationManager.getApplication(), ImplicitUsageProvider.EP_NAME, new ImplicitUsageProvider() {
       @Override
       public boolean isImplicitUsage(@NotNull PsiElement element) {
         return false;
@@ -57,7 +43,7 @@ public class UnusedReturnValueQuickFixTest extends LightJavaCodeInsightFixtureTe
         return false;
       }
     }, getTestRootDisposable());
-    PlatformTestUtil.registerExtension(Extensions.getRootArea(), ExtensionPointName.create(ToolExtensionPoints.DEAD_CODE_TOOL), new EntryPoint() {
+    ServiceContainerUtil.registerExtension(ApplicationManager.getApplication(), ExtensionPointName.create(ToolExtensionPoints.DEAD_CODE_TOOL), new EntryPoint() {
       @Override
       public void readExternal(Element element) throws InvalidDataException { }
 
diff --git a/java/java-tests/testSrc/com/intellij/java/codeInspection/VisibilityInspectionTest.java b/java/java-tests/testSrc/com/intellij/java/codeInspection/VisibilityInspectionTest.java
index 7451f922c35e..4dcb265e4cd4 100644
--- a/java/java-tests/testSrc/com/intellij/java/codeInspection/VisibilityInspectionTest.java
+++ b/java/java-tests/testSrc/com/intellij/java/codeInspection/VisibilityInspectionTest.java
@@ -6,8 +6,8 @@ import com.intellij.ToolExtensionPoints;
 import com.intellij.codeInspection.reference.RefElement;
 import com.intellij.codeInspection.visibility.EntryPointWithVisibilityLevel;
 import com.intellij.codeInspection.visibility.VisibilityInspection;
+import com.intellij.openapi.application.ApplicationManager;
 import com.intellij.openapi.extensions.ExtensionPointName;
-import com.intellij.openapi.extensions.Extensions;
 import com.intellij.openapi.util.InvalidDataException;
 import com.intellij.openapi.util.WriteExternalException;
 import com.intellij.psi.PsiClass;
@@ -16,7 +16,7 @@ import com.intellij.psi.PsiMember;
 import com.intellij.psi.PsiMethod;
 import com.intellij.psi.util.PsiUtil;
 import com.intellij.testFramework.JavaInspectionTestCase;
-import com.intellij.testFramework.PlatformTestUtil;
+import com.intellij.testFramework.ServiceContainerUtil;
 import org.jdom.Element;
 import org.jetbrains.annotations.NotNull;
 
@@ -169,7 +169,7 @@ public class VisibilityInspectionTest extends JavaInspectionTestCase {
   }
 
   public void testEntryPointWithPredefinedVisibility() {
-    PlatformTestUtil.registerExtension(Extensions.getRootArea(), ExtensionPointName.create(ToolExtensionPoints.DEAD_CODE_TOOL), new EntryPointWithVisibilityLevel() {
+    ServiceContainerUtil.registerExtension(ApplicationManager.getApplication(), ExtensionPointName.create(ToolExtensionPoints.DEAD_CODE_TOOL), new EntryPointWithVisibilityLevel() {
       @Override
       public void readExternal(Element element) throws InvalidDataException {}
 
diff --git a/java/java-tests/testSrc/com/intellij/java/ide/fileTemplates/impl/FileTemplatesTest.groovy b/java/java-tests/testSrc/com/intellij/java/ide/fileTemplates/impl/FileTemplatesTest.groovy
index 01e73c43cbba..cec7521ac87f 100644
--- a/java/java-tests/testSrc/com/intellij/java/ide/fileTemplates/impl/FileTemplatesTest.groovy
+++ b/java/java-tests/testSrc/com/intellij/java/ide/fileTemplates/impl/FileTemplatesTest.groovy
@@ -5,8 +5,8 @@ import com.intellij.ide.fileTemplates.*
 import com.intellij.ide.fileTemplates.impl.CustomFileTemplate
 import com.intellij.ide.fileTemplates.impl.FTManager
 import com.intellij.openapi.Disposable
+import com.intellij.openapi.application.ApplicationManager
 import com.intellij.openapi.application.ex.PathManagerEx
-import com.intellij.openapi.extensions.Extensions
 import com.intellij.openapi.roots.ModuleRootManager
 import com.intellij.openapi.util.io.FileUtil
 import com.intellij.openapi.util.text.StringUtil
@@ -17,8 +17,8 @@ import com.intellij.psi.PsiClass
 import com.intellij.psi.PsiDirectory
 import com.intellij.psi.PsiManager
 import com.intellij.testFramework.JavaProjectTestCase
-import com.intellij.testFramework.PlatformTestUtil
 import com.intellij.testFramework.PsiTestUtil
+import com.intellij.testFramework.ServiceContainerUtil
 import com.intellij.util.io.PathKt
 import com.intellij.util.properties.EncodingAwareProperties
 
@@ -159,7 +159,7 @@ class FileTemplatesTest extends JavaProjectTestCase {
 
   void testFileNameTrimming() {
     CreateFromTemplateHandler handler = new DefaultCreateFromTemplateHandler()
-    PlatformTestUtil.registerExtension(Extensions.getRootArea(), CreateFromTemplateHandler.EP_NAME, handler, getTestRootDisposable())
+    ServiceContainerUtil.registerExtension(ApplicationManager.getApplication(), CreateFromTemplateHandler.EP_NAME, handler, getTestRootDisposable())
     FileTemplate template = FileTemplateManager.getInstance(getProject()).addTemplate(name, "txt")
     disposeOnTearDown({ FileTemplateManager.getInstance(getProject()).removeTemplate(template) } as Disposable)
     template.setText('${FILE_NAME}')
diff --git a/platform/platform-tests/testSrc/com/intellij/execution/impl/ConsoleViewImplTest.java b/platform/platform-tests/testSrc/com/intellij/execution/impl/ConsoleViewImplTest.java
index 9a7c2f038834..f627803968ef 100644
--- a/platform/platform-tests/testSrc/com/intellij/execution/impl/ConsoleViewImplTest.java
+++ b/platform/platform-tests/testSrc/com/intellij/execution/impl/ConsoleViewImplTest.java
@@ -25,7 +25,6 @@ import com.intellij.openapi.editor.impl.DocumentMarkupModel;
 import com.intellij.openapi.editor.markup.MarkupModel;
 import com.intellij.openapi.editor.markup.RangeHighlighter;
 import com.intellij.openapi.extensions.ExtensionPoint;
-import com.intellij.openapi.extensions.Extensions;
 import com.intellij.openapi.project.Project;
 import com.intellij.openapi.util.Disposer;
 import com.intellij.openapi.util.Pair;
@@ -540,7 +539,7 @@ public class ConsoleViewImplTest extends LightPlatformTestCase {
   }
 
   public void testSubsequentFoldsAreCombined() {
-    PlatformTestUtil.registerExtension(Extensions.getRootArea(), ConsoleFolding.EP_NAME, new ConsoleFolding() {
+    ServiceContainerUtil.registerExtension(ApplicationManager.getApplication(), ConsoleFolding.EP_NAME, new ConsoleFolding() {
       @Override
       public boolean shouldFoldLine(@NotNull Project project, @NotNull String line) {
         return line.contains("FOO");
diff --git a/platform/platform-tests/testSrc/com/intellij/featureStatistics/ProductivityFeaturesTest.java b/platform/platform-tests/testSrc/com/intellij/featureStatistics/ProductivityFeaturesTest.java
index ffd42a6ae872..5b4792bccff8 100644
--- a/platform/platform-tests/testSrc/com/intellij/featureStatistics/ProductivityFeaturesTest.java
+++ b/platform/platform-tests/testSrc/com/intellij/featureStatistics/ProductivityFeaturesTest.java
@@ -5,11 +5,10 @@ import com.intellij.ide.plugins.PluginManagerCore;
 import com.intellij.ide.util.TipAndTrickBean;
 import com.intellij.ide.util.TipUIUtil;
 import com.intellij.openapi.application.ApplicationManager;
-import com.intellij.openapi.extensions.Extensions;
 import com.intellij.openapi.extensions.PluginId;
 import com.intellij.openapi.util.registry.Registry;
 import com.intellij.testFramework.LightPlatformTestCase;
-import com.intellij.testFramework.PlatformTestUtil;
+import com.intellij.testFramework.ServiceContainerUtil;
 import org.jdom.Element;
 
 public class ProductivityFeaturesTest extends LightPlatformTestCase {
@@ -23,12 +22,12 @@ public class ProductivityFeaturesTest extends LightPlatformTestCase {
     ((ProductivityFeaturesRegistryImpl)myRegistry).prepareForTest();
     myTracker = FeatureUsageTracker.getInstance();
 
-    PlatformTestUtil.registerExtension(Extensions.getRootArea(), ProductivityFeaturesProvider.EP_NAME, new TestProductivityFeatureProvider(), getTestRootDisposable());
+    ServiceContainerUtil.registerExtension(ApplicationManager.getApplication(), ProductivityFeaturesProvider.EP_NAME, new TestProductivityFeatureProvider(), getTestRootDisposable());
 
     TipAndTrickBean tip = new TipAndTrickBean();
     tip.fileName = "TestTip.html";
     tip.setPluginDescriptor(PluginManagerCore.getPlugin(PluginId.getId(PluginManagerCore.CORE_PLUGIN_ID)));
-    PlatformTestUtil.registerExtension(Extensions.getRootArea(), TipAndTrickBean.EP_NAME, tip, getTestRootDisposable());
+    ServiceContainerUtil.registerExtension(ApplicationManager.getApplication(), TipAndTrickBean.EP_NAME, tip, getTestRootDisposable());
   }
 
   @Override
diff --git a/platform/platform-tests/testSrc/com/intellij/internal/statistics/validator/ProductivityValidatorTest.kt b/platform/platform-tests/testSrc/com/intellij/internal/statistics/validator/ProductivityValidatorTest.kt
index 39b83bff6f99..120160fca9c7 100644
--- a/platform/platform-tests/testSrc/com/intellij/internal/statistics/validator/ProductivityValidatorTest.kt
+++ b/platform/platform-tests/testSrc/com/intellij/internal/statistics/validator/ProductivityValidatorTest.kt
@@ -6,8 +6,8 @@ import com.intellij.internal.statistic.eventLog.FeatureUsageData
 import com.intellij.internal.statistic.eventLog.validator.ValidationResultType
 import com.intellij.internal.statistic.eventLog.validator.rules.EventContext
 import com.intellij.internal.statistic.eventLog.validator.rules.impl.CustomWhiteListRule
-import com.intellij.openapi.extensions.Extensions
-import com.intellij.testFramework.PlatformTestUtil
+import com.intellij.openapi.application.ApplicationManager
+import com.intellij.testFramework.registerExtension
 import junit.framework.TestCase
 import org.junit.Test
 
@@ -21,8 +21,7 @@ class ProductivityValidatorTest : ProductivityFeaturesTest() {
 
   override fun setUp() {
     super.setUp()
-    PlatformTestUtil.registerExtension(
-      Extensions.getRootArea(),
+    ApplicationManager.getApplication().registerExtension(
       ProductivityFeaturesProvider.EP_NAME, TestProductivityFeatureProvider(),
       testRootDisposable
     )
diff --git a/platform/platform-tests/testSrc/com/intellij/lang/LanguageExtensionOrderTest.groovy b/platform/platform-tests/testSrc/com/intellij/lang/LanguageExtensionOrderTest.groovy
index a6e599afc56c..bdecf16b0e8e 100644
--- a/platform/platform-tests/testSrc/com/intellij/lang/LanguageExtensionOrderTest.groovy
+++ b/platform/platform-tests/testSrc/com/intellij/lang/LanguageExtensionOrderTest.groovy
@@ -9,7 +9,7 @@ import com.intellij.openapi.extensions.impl.ExtensionsAreaImpl
 import com.intellij.openapi.util.Disposer
 import com.intellij.openapi.util.JDOMUtil
 import com.intellij.testFramework.LightPlatformTestCase
-import com.intellij.testFramework.PlatformTestUtil
+import com.intellij.testFramework.ServiceContainerUtil
 import groovy.transform.CompileStatic
 
 @CompileStatic
@@ -27,7 +27,7 @@ class LanguageExtensionOrderTest extends LightPlatformTestCase {
   }
 
   private void registerMetaLanguage() {
-    PlatformTestUtil.registerExtension myArea, MetaLanguage.EP_NAME, MyMetaLanguage.INSTANCE, testRootDisposable
+    ServiceContainerUtil.registerExtension(ApplicationManager.getApplication(), MetaLanguage.EP_NAME, MyMetaLanguage.INSTANCE, testRootDisposable)
   }
 
   private void registerLanguageEP() {
diff --git a/platform/platform-tests/testSrc/com/intellij/openapi/fileEditor/NonProjectFileAccessTest.java b/platform/platform-tests/testSrc/com/intellij/openapi/fileEditor/NonProjectFileAccessTest.java
index 8c9e525b9478..2a7abcdf9dd3 100644
--- a/platform/platform-tests/testSrc/com/intellij/openapi/fileEditor/NonProjectFileAccessTest.java
+++ b/platform/platform-tests/testSrc/com/intellij/openapi/fileEditor/NonProjectFileAccessTest.java
@@ -28,6 +28,7 @@ import com.intellij.openapi.vfs.WritingAccessProvider;
 import com.intellij.testFramework.EditorTestUtil;
 import com.intellij.testFramework.PlatformTestUtil;
 import com.intellij.testFramework.PsiTestUtil;
+import com.intellij.testFramework.ServiceContainerUtil;
 import com.intellij.ui.EditorNotifications;
 import com.intellij.ui.EditorNotificationsImpl;
 import com.intellij.util.NullableFunction;
@@ -317,7 +318,7 @@ public class NonProjectFileAccessTest extends HeavyFileEditorManagerTestCase {
 
   private Set<VirtualFile> registerWriteAccessProvider(final VirtualFile... filesToDeny) {
     final Set<VirtualFile> requested = new LinkedHashSet<>();
-    PlatformTestUtil.registerExtension(getProject().getExtensionArea(), WritingAccessProvider.EP_NAME, new WritingAccessProvider() {
+    ServiceContainerUtil.registerExtension(getProject(), WritingAccessProvider.EP_NAME, new WritingAccessProvider() {
       @NotNull
       @Override
       public Collection<VirtualFile> requestWriting(@NotNull Collection<? extends VirtualFile> files) {
@@ -331,7 +332,7 @@ public class NonProjectFileAccessTest extends HeavyFileEditorManagerTestCase {
   }
 
   private void registerAccessCheckExtension(Collection<VirtualFile> filesToAllow, Collection<VirtualFile> filesToDeny) {
-    PlatformTestUtil.registerExtension(getProject().getExtensionArea(), NonProjectFileWritingAccessExtension.EP_NAME,
+    ServiceContainerUtil.registerExtension(getProject(), NonProjectFileWritingAccessExtension.EP_NAME,
                                        new NonProjectFileWritingAccessExtension() {
                                          @Override
                                          public boolean isWritable(@NotNull VirtualFile file) {
diff --git a/platform/service-container/overview.md b/platform/service-container/overview.md
index bcaadd5b9eef..037362b1edf3 100644
--- a/platform/service-container/overview.md
+++ b/platform/service-container/overview.md
@@ -1,16 +1,21 @@
-This document is a more like a draft, that will be finally moved to [IntelliJ Platform SDK](https://www.jetbrains.org/intellij/sdk/docs/welcome.html) 
+This document is a more like a draft, that will be finally moved to [IntelliJ Platform SDK](https://www.jetbrains.org/intellij/sdk/docs/welcome.html)
 
-## Light Service
+## Service
 
-[Service](http://www.jetbrains.org/intellij/sdk/docs/basics/plugin_structure/plugin_services.html) that is not going to be overridden. No need to register it in a `plugin.xml`.
+Please see [Service](https://www.jetbrains.org/intellij/sdk/docs/basics/plugin_structure/plugin_services.html).
+
+To replace (mock) service in tests, use [ServiceContainerUtil](https://github.com/JetBrains/intellij-community/blob/master/platform/testFramework/src/com/intellij/testFramework/ServiceContainerUtil.kt).
+
+### Light Service
+
+Service that is not going to be overridden. No need to register it in a `plugin.xml`.
 
 To register: annotate class using [@Service](https://github.com/JetBrains/intellij-community/blob/master/platform/core-api/src/com/intellij/openapi/components/Service.java) annotation. If service is written in Java and not Kotlin, mark class as `final`.
  
 Restrictions:
 
-* not available for constructor injection (but in any case constructor injection is deprecated, because service should be requested only on demand).
 * constructor injection is not supported (since it is deprecated), but project level service can define constructor that accepts `Project`, and module level `Module`.
-* if service it is a [PersistentStateComponent](http://www.jetbrains.org/intellij/sdk/docs/basics/persisting_state_of_components.html), roaming must be disabled (`roamingType` is set to `RoamingType.DISABLED`).
+* if service it is a [PersistentStateComponent](https://www.jetbrains.org/intellij/sdk/docs/basics/persisting_state_of_components.html), roaming must be disabled (`roamingType` is set to `RoamingType.DISABLED`).
 * service class must be `final`.
 
 ## Preloading Activity
diff --git a/platform/testFramework/src/com/intellij/testFramework/PlatformLiteFixture.java b/platform/testFramework/src/com/intellij/testFramework/PlatformLiteFixture.java
index 987eea4e6c83..ccbcc264a18f 100644
--- a/platform/testFramework/src/com/intellij/testFramework/PlatformLiteFixture.java
+++ b/platform/testFramework/src/com/intellij/testFramework/PlatformLiteFixture.java
@@ -57,7 +57,7 @@ public abstract class PlatformLiteFixture extends UsefulTestCase {
   public <T> void registerExtension(@NotNull ExtensionsArea area, @NotNull ExtensionPointName<T> name, @NotNull T extension) {
     //noinspection unchecked
     registerExtensionPoint(area, name, (Class<T>)extension.getClass());
-    PlatformTestUtil.registerExtension(area, name, extension, getTestRootDisposable());
+    area.<T>getExtensionPoint(name.getName()).registerExtension(extension, getTestRootDisposable());
   }
 
   protected <T> void registerExtensionPoint(@NotNull ExtensionPointName<T> extensionPointName, @NotNull Class<T> aClass) {
diff --git a/platform/testFramework/src/com/intellij/testFramework/PlatformTestUtil.java b/platform/testFramework/src/com/intellij/testFramework/PlatformTestUtil.java
index 2fa142dd0b0a..95d472f5003e 100644
--- a/platform/testFramework/src/com/intellij/testFramework/PlatformTestUtil.java
+++ b/platform/testFramework/src/com/intellij/testFramework/PlatformTestUtil.java
@@ -25,7 +25,7 @@ import com.intellij.openapi.application.ModalityState;
 import com.intellij.openapi.application.impl.ApplicationImpl;
 import com.intellij.openapi.application.impl.LaterInvocator;
 import com.intellij.openapi.editor.Document;
-import com.intellij.openapi.extensions.*;
+import com.intellij.openapi.extensions.ProjectExtensionPointName;
 import com.intellij.openapi.extensions.impl.ExtensionPointImpl;
 import com.intellij.openapi.fileEditor.FileDocumentManager;
 import com.intellij.openapi.fileEditor.impl.LoadTextUtil;
@@ -141,21 +141,6 @@ public class PlatformTestUtil {
     ((ExtensionPointImpl<T>)pointName.getPoint(project)).maskAll(newExtensions, parentDisposable, true);
   }
 
-  /**
-   * @deprecated Use {@link ExtensionPointName#getPoint(AreaInstance)} and {@link ExtensionPoint#registerExtension(Object, Disposable)}.
-   */
-  @Deprecated
-  public static <T> void registerExtension(@NotNull ExtensionPointName<T> name, @NotNull T t, @NotNull Disposable parentDisposable) {
-    registerExtension(Extensions.getRootArea(), name, t, parentDisposable);
-  }
-
-  public static <T> void registerExtension(@NotNull ExtensionsArea area,
-                                           @NotNull BaseExtensionPointName name,
-                                           @NotNull T t,
-                                           @NotNull Disposable parentDisposable) {
-    area.<T>getExtensionPoint(name.getName()).registerExtension(t, parentDisposable);
-  }
-
   @Nullable
   public static String toString(@Nullable Object node, @Nullable Queryable.PrintInfo printInfo) {
     if (node instanceof AbstractTreeNode) {
diff --git a/platform/testFramework/src/com/intellij/testFramework/ServiceContainerUtil.kt b/platform/testFramework/src/com/intellij/testFramework/ServiceContainerUtil.kt
index 2d64bdab22d2..cd49764c2968 100644
--- a/platform/testFramework/src/com/intellij/testFramework/ServiceContainerUtil.kt
+++ b/platform/testFramework/src/com/intellij/testFramework/ServiceContainerUtil.kt
@@ -4,13 +4,22 @@ package com.intellij.testFramework
 
 import com.intellij.openapi.Disposable
 import com.intellij.openapi.components.ComponentManager
+import com.intellij.openapi.extensions.BaseExtensionPointName
 import com.intellij.openapi.extensions.DefaultPluginDescriptor
 import com.intellij.serviceContainer.PlatformComponentManagerImpl
+import org.jetbrains.annotations.TestOnly
 
+@TestOnly
 fun <T : Any> ComponentManager.registerServiceInstance(serviceInterface: Class<T>, instance: T) {
   (this as PlatformComponentManagerImpl).registerServiceInstance(serviceInterface, instance, DefaultPluginDescriptor("test"))
 }
 
+@TestOnly
 fun <T : Any> ComponentManager.replaceService(serviceInterface: Class<T>, instance: T, parentDisposable: Disposable) {
   (this as PlatformComponentManagerImpl).replaceServiceInstance(serviceInterface, instance, parentDisposable)
+}
+
+@TestOnly
+fun <T> ComponentManager.registerExtension(name: BaseExtensionPointName, instance: T, parentDisposable: Disposable) {
+  extensionArea.getExtensionPoint<T>(name.name).registerExtension(instance, parentDisposable)
 }
\ No newline at end of file
diff --git a/plugins/InspectionGadgets/testsrc/com/intellij/codeInspection/visibility/AccessCanBeTightenedInspectionTest.java b/plugins/InspectionGadgets/testsrc/com/intellij/codeInspection/visibility/AccessCanBeTightenedInspectionTest.java
index fca09a215f4d..6d0ac77a015d 100644
--- a/plugins/InspectionGadgets/testsrc/com/intellij/codeInspection/visibility/AccessCanBeTightenedInspectionTest.java
+++ b/plugins/InspectionGadgets/testsrc/com/intellij/codeInspection/visibility/AccessCanBeTightenedInspectionTest.java
@@ -1,31 +1,17 @@
-/*
- * Copyright 2000-2016 JetBrains s.r.o.
- *
- * 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.
- */
+// Copyright 2000-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 package com.intellij.codeInspection.visibility;
 
 import com.intellij.ToolExtensionPoints;
 import com.intellij.codeInsight.daemon.ImplicitUsageProvider;
 import com.intellij.codeInspection.LocalInspectionTool;
 import com.intellij.codeInspection.reference.RefElement;
+import com.intellij.openapi.application.ApplicationManager;
 import com.intellij.openapi.extensions.ExtensionPointName;
-import com.intellij.openapi.extensions.Extensions;
 import com.intellij.openapi.util.InvalidDataException;
 import com.intellij.openapi.util.WriteExternalException;
 import com.intellij.psi.*;
 import com.intellij.psi.util.PsiUtil;
-import com.intellij.testFramework.PlatformTestUtil;
+import com.intellij.testFramework.ServiceContainerUtil;
 import com.siyeh.ig.LightJavaInspectionTestCase;
 import org.intellij.lang.annotations.Language;
 import org.jdom.Element;
@@ -161,7 +147,7 @@ public class AccessCanBeTightenedInspectionTest extends LightJavaInspectionTestC
     myFixture.configureByFiles("y/C.java","x/Sub.java");
     myFixture.checkHighlighting();
   }
-  
+
   public void testQualifiedAccessFromSubclassSamePackage() {
     myFixture.allowTreeAccessForAllFiles();
     addJavaFile("x/Sub.java", "package x; " +
@@ -336,7 +322,7 @@ public class AccessCanBeTightenedInspectionTest extends LightJavaInspectionTestC
                                "public class MyTest {\n" +
                                "    <warning descr=\"Access can be protected\">public</warning> void foo() {}\n" +
                                "}");
-    PlatformTestUtil.registerExtension(Extensions.getRootArea(), ExtensionPointName.create(ToolExtensionPoints.DEAD_CODE_TOOL), new EntryPointWithVisibilityLevel() {
+    ServiceContainerUtil.registerExtension(ApplicationManager.getApplication(), ExtensionPointName.create(ToolExtensionPoints.DEAD_CODE_TOOL), new EntryPointWithVisibilityLevel() {
       @Override
       public void readExternal(Element element) throws InvalidDataException {}
 
@@ -392,7 +378,7 @@ public class AccessCanBeTightenedInspectionTest extends LightJavaInspectionTestC
                                "    <warning descr=\"Access can be protected\">public</warning> void foo() {}\n" +
                                "    {foo();}\n" +
                                "}");
-    PlatformTestUtil.registerExtension(Extensions.getRootArea(), ExtensionPointName.create(ToolExtensionPoints.DEAD_CODE_TOOL), new EntryPointWithVisibilityLevel() {
+    ServiceContainerUtil.registerExtension(ApplicationManager.getApplication(), ExtensionPointName.create(ToolExtensionPoints.DEAD_CODE_TOOL), new EntryPointWithVisibilityLevel() {
       @Override
       public void readExternal(Element element) throws InvalidDataException {}
 
@@ -445,10 +431,10 @@ public class AccessCanBeTightenedInspectionTest extends LightJavaInspectionTestC
   public void testSuggestPackagePrivateForImplicitWrittenFields() {
     addJavaFile("x/MyTest.java", "package x;\n" +
                                "public class MyTest {\n" +
-                               "    String foo;\n" + 
-                               "  {System.out.println(foo);}" + 
+                               "    String foo;\n" +
+                               "  {System.out.println(foo);}" +
                                "}");
-    PlatformTestUtil.registerExtension(Extensions.getRootArea(), ImplicitUsageProvider.EP_NAME, new ImplicitUsageProvider() {
+    ServiceContainerUtil.registerExtension(ApplicationManager.getApplication(), ImplicitUsageProvider.EP_NAME, new ImplicitUsageProvider() {
       @Override
       public boolean isImplicitUsage(@NotNull PsiElement element) {
         return false;
diff --git a/plugins/InspectionGadgets/testsrc/com/siyeh/ig/bugs/MismatchedCollectionQueryUpdateInspectionTest.java b/plugins/InspectionGadgets/testsrc/com/siyeh/ig/bugs/MismatchedCollectionQueryUpdateInspectionTest.java
index 2ec92bb3e187..9a78886b12cb 100644
--- a/plugins/InspectionGadgets/testsrc/com/siyeh/ig/bugs/MismatchedCollectionQueryUpdateInspectionTest.java
+++ b/plugins/InspectionGadgets/testsrc/com/siyeh/ig/bugs/MismatchedCollectionQueryUpdateInspectionTest.java
@@ -4,11 +4,12 @@ package com.siyeh.ig.bugs;
 import com.intellij.ToolExtensionPoints;
 import com.intellij.codeInsight.daemon.ImplicitUsageProvider;
 import com.intellij.codeInspection.InspectionProfileEntry;
+import com.intellij.openapi.application.ApplicationManager;
 import com.intellij.openapi.extensions.Extensions;
 import com.intellij.psi.PsiElement;
 import com.intellij.psi.PsiField;
 import com.intellij.testFramework.LightProjectDescriptor;
-import com.intellij.testFramework.PlatformTestUtil;
+import com.intellij.testFramework.ServiceContainerUtil;
 import com.siyeh.ig.LightJavaInspectionTestCase;
 import org.jetbrains.annotations.NotNull;
 
@@ -34,7 +35,7 @@ public class MismatchedCollectionQueryUpdateInspectionTest extends LightJavaInsp
   @Override
   protected void setUp() throws Exception {
     super.setUp();
-    PlatformTestUtil.registerExtension(Extensions.getRootArea(), ImplicitUsageProvider.EP_NAME, TEST_PROVIDER, myFixture.getTestRootDisposable());
+    ServiceContainerUtil.registerExtension(ApplicationManager.getApplication(), ImplicitUsageProvider.EP_NAME, TEST_PROVIDER, myFixture.getTestRootDisposable());
     Extensions.getRootArea().getExtensionPoint(ToolExtensionPoints.DEAD_CODE_TOOL).getExtensions();
   }
 
diff --git a/plugins/InspectionGadgets/testsrc/com/siyeh/ig/resources/ImplicitCloserTest.java b/plugins/InspectionGadgets/testsrc/com/siyeh/ig/resources/ImplicitCloserTest.java
index ef9abfeb5e35..3fcf491ed7de 100644
--- a/plugins/InspectionGadgets/testsrc/com/siyeh/ig/resources/ImplicitCloserTest.java
+++ b/plugins/InspectionGadgets/testsrc/com/siyeh/ig/resources/ImplicitCloserTest.java
@@ -1,13 +1,11 @@
-/*
- * Copyright 2000-2017 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
- */
+// Copyright 2000-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 package com.siyeh.ig.resources;
 
-import com.intellij.codeInspection.resources.ImplicitResourceCloser;
 import com.intellij.codeInspection.LocalInspectionTool;
-import com.intellij.openapi.extensions.Extensions;
+import com.intellij.codeInspection.resources.ImplicitResourceCloser;
+import com.intellij.openapi.application.ApplicationManager;
 import com.intellij.psi.PsiVariable;
-import com.intellij.testFramework.PlatformTestUtil;
+import com.intellij.testFramework.ServiceContainerUtil;
 import com.siyeh.ig.LightJavaInspectionTestCase;
 import org.jetbrains.annotations.NotNull;
 
@@ -33,13 +31,11 @@ public class ImplicitCloserTest extends LightJavaInspectionTestCase {
   @Override
   protected void setUp() throws Exception {
     super.setUp();
-    PlatformTestUtil.registerExtension(Extensions.getRootArea(), ImplicitResourceCloser.EP_NAME, NAME_RESOURCE_CLOSER, getTestRootDisposable());
+    ServiceContainerUtil.registerExtension(ApplicationManager.getApplication(), ImplicitResourceCloser.EP_NAME, NAME_RESOURCE_CLOSER, getTestRootDisposable());
   }
 
   @Override
   protected LocalInspectionTool getInspection() {
     return new AutoCloseableResourceInspection();
   }
-
-
 }
diff --git a/python/testSrc/com/jetbrains/python/quickFixes/PyRenameElementQuickFixTest.java b/python/testSrc/com/jetbrains/python/quickFixes/PyRenameElementQuickFixTest.java
index 939e10ede562..d6e6d4b69336 100644
--- a/python/testSrc/com/jetbrains/python/quickFixes/PyRenameElementQuickFixTest.java
+++ b/python/testSrc/com/jetbrains/python/quickFixes/PyRenameElementQuickFixTest.java
@@ -1,26 +1,12 @@
-/*
- * Copyright 2000-2016 JetBrains s.r.o.
- *
- * 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.
- */
+// Copyright 2000-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 package com.jetbrains.python.quickFixes;
 
 import com.intellij.lang.injection.InjectedLanguageManager;
 import com.intellij.lang.injection.MultiHostInjector;
 import com.intellij.lang.injection.MultiHostRegistrar;
 import com.intellij.openapi.Disposable;
+import com.intellij.openapi.application.ApplicationManager;
 import com.intellij.openapi.editor.Editor;
-import com.intellij.openapi.extensions.Extensions;
 import com.intellij.openapi.project.Project;
 import com.intellij.openapi.util.Disposer;
 import com.intellij.openapi.util.TextRange;
@@ -29,7 +15,7 @@ import com.intellij.psi.PsiLanguageInjectionHost;
 import com.intellij.psi.codeStyle.SuggestedNameInfo;
 import com.intellij.refactoring.rename.NameSuggestionProvider;
 import com.intellij.refactoring.rename.PreferrableNameSuggestionProvider;
-import com.intellij.testFramework.PlatformTestUtil;
+import com.intellij.testFramework.ServiceContainerUtil;
 import com.intellij.testFramework.TestDataPath;
 import com.intellij.util.containers.ContainerUtil;
 import com.jetbrains.python.PyBundle;
@@ -65,8 +51,7 @@ public class PyRenameElementQuickFixTest extends PyQuickFixTestCase {
    * @see PyRenameElementQuickFixTest.RENAME_RESULT_BY_RENAME_HANDLER
    */
   public static void registerTestNameSuggestionProvider(Disposable disposable) {
-    PlatformTestUtil.registerExtension(
-      Extensions.getRootArea(), NameSuggestionProvider.EP_NAME, createTestNameSuggestionProvider(), disposable);
+    ServiceContainerUtil.registerExtension(ApplicationManager.getApplication(), NameSuggestionProvider.EP_NAME, createTestNameSuggestionProvider(), disposable);
   }
 
   /**
diff --git a/xml/dom-tests/tests/com/intellij/util/xml/DomConcurrencyStressTest.java b/xml/dom-tests/tests/com/intellij/util/xml/DomConcurrencyStressTest.java
index 6238187003bb..41b1a9dbe81c 100644
--- a/xml/dom-tests/tests/com/intellij/util/xml/DomConcurrencyStressTest.java
+++ b/xml/dom-tests/tests/com/intellij/util/xml/DomConcurrencyStressTest.java
@@ -1,28 +1,13 @@
-/*
- * Copyright 2000-2016 JetBrains s.r.o.
- *
- * 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.
- */
+// Copyright 2000-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 package com.intellij.util.xml;
 
 import com.intellij.openapi.application.ApplicationManager;
-import com.intellij.openapi.extensions.Extensions;
 import com.intellij.openapi.util.Ref;
 import com.intellij.openapi.util.text.StringUtil;
 import com.intellij.psi.util.PsiTreeUtil;
 import com.intellij.psi.xml.XmlFile;
 import com.intellij.psi.xml.XmlTag;
-import com.intellij.testFramework.PlatformTestUtil;
+import com.intellij.testFramework.ServiceContainerUtil;
 import com.intellij.testFramework.Timings;
 import com.intellij.util.ConcurrencyUtil;
 import com.intellij.util.containers.ContainerUtil;
@@ -41,12 +26,11 @@ import java.util.concurrent.CountDownLatch;
  * @author peter
  */
 public class DomConcurrencyStressTest extends DomTestCase {
-
   private void registerExtender(final Class elementClass, final Class extenderClass) {
     final DomExtenderEP extenderEP = new DomExtenderEP();
     extenderEP.domClassName = elementClass.getName();
     extenderEP.extenderClassName = extenderClass.getName();
-    PlatformTestUtil.registerExtension(Extensions.getRootArea(), DomExtenderEP.EP_NAME, extenderEP, getTestRootDisposable());
+    ServiceContainerUtil.registerExtension(ApplicationManager.getApplication(), DomExtenderEP.EP_NAME, extenderEP, getTestRootDisposable());
   }
 
   private static void runThreads(int threadCount, final Runnable runnable) throws Throwable {
diff --git a/xml/dom-tests/tests/com/intellij/util/xml/DomExtensionsTest.java b/xml/dom-tests/tests/com/intellij/util/xml/DomExtensionsTest.java
index b8a577b06820..b6f7715c149c 100644
--- a/xml/dom-tests/tests/com/intellij/util/xml/DomExtensionsTest.java
+++ b/xml/dom-tests/tests/com/intellij/util/xml/DomExtensionsTest.java
@@ -1,23 +1,9 @@
-/*
- * Copyright 2000-2016 JetBrains s.r.o.
- *
- * 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.
- */
+// Copyright 2000-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 package com.intellij.util.xml;
 
-import com.intellij.openapi.extensions.Extensions;
+import com.intellij.openapi.application.ApplicationManager;
 import com.intellij.openapi.util.Key;
-import com.intellij.testFramework.PlatformTestUtil;
+import com.intellij.testFramework.ServiceContainerUtil;
 import com.intellij.util.ParameterizedTypeImpl;
 import com.intellij.util.ReflectionUtil;
 import com.intellij.util.xml.impl.DomTestCase;
@@ -190,7 +176,7 @@ public class DomExtensionsTest extends DomTestCase {
     final DomExtenderEP extenderEP = new DomExtenderEP();
     extenderEP.domClassName = domClass.getName();
     extenderEP.extenderClassName = extenderClass.getName();
-    PlatformTestUtil.registerExtension(Extensions.getRootArea(), DomExtenderEP.EP_NAME, extenderEP, getTestRootDisposable());
+    ServiceContainerUtil.registerExtension(ApplicationManager.getApplication(), DomExtenderEP.EP_NAME, extenderEP, getTestRootDisposable());
   }
 
 
diff --git a/xml/dom-tests/tests/com/intellij/util/xml/stubs/DomStubBuilderTest.java b/xml/dom-tests/tests/com/intellij/util/xml/stubs/DomStubBuilderTest.java
index e0714e523f55..50e24835fac4 100644
--- a/xml/dom-tests/tests/com/intellij/util/xml/stubs/DomStubBuilderTest.java
+++ b/xml/dom-tests/tests/com/intellij/util/xml/stubs/DomStubBuilderTest.java
@@ -1,21 +1,7 @@
-/*
- * Copyright 2000-2016 JetBrains s.r.o.
- *
- * 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.
- */
+// Copyright 2000-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 package com.intellij.util.xml.stubs;
 
-import com.intellij.openapi.extensions.Extensions;
+import com.intellij.openapi.application.ApplicationManager;
 import com.intellij.openapi.vfs.VirtualFile;
 import com.intellij.psi.PsiFile;
 import com.intellij.psi.impl.PsiManagerEx;
@@ -25,7 +11,7 @@ import com.intellij.psi.stubs.Stub;
 import com.intellij.psi.stubs.StubTreeLoader;
 import com.intellij.psi.xml.XmlFile;
 import com.intellij.psi.xml.XmlTag;
-import com.intellij.testFramework.PlatformTestUtil;
+import com.intellij.testFramework.ServiceContainerUtil;
 import com.intellij.util.containers.ContainerUtil;
 import com.intellij.util.ref.GCWatcher;
 import com.intellij.util.xml.DomFileElement;
@@ -86,7 +72,7 @@ public class DomStubBuilderTest extends DomStubTest {
     DomExtenderEP ep = new DomExtenderEP();
     ep.domClassName = Bar.class.getName();
     ep.extenderClassName = TestExtender.class.getName();
-    PlatformTestUtil.registerExtension(Extensions.getRootArea(), DomExtenderEP.EP_NAME, ep, myFixture.getTestRootDisposable());
+    ServiceContainerUtil.registerExtension(ApplicationManager.getApplication(), DomExtenderEP.EP_NAME, ep, myFixture.getTestRootDisposable());
 
     doBuilderTest("extender.xml", "File:foo\n" +
                                   "  Element:foo\n" +