diff --git a/packages/markers/src/browser/problem/problem-container.ts b/packages/markers/src/browser/problem/problem-container.ts
index f05b2a57f7537..d8ebf984f3757 100644
--- a/packages/markers/src/browser/problem/problem-container.ts
+++ b/packages/markers/src/browser/problem/problem-container.ts
@@ -9,16 +9,16 @@ import { interfaces, Container } from "inversify";
 import { MarkerOptions } from '../marker-tree';
 import { ProblemWidget } from './problem-widget';
 import { ProblemTreeModel, ProblemTree } from './problem-tree-model';
-import { MARKER_CONTEXT_MENU } from './problem-contribution';
 import { TreeWidget, TreeProps, defaultTreeProps, ITreeModel, createTreeContainer, TreeModel, Tree, ITree } from "@theia/core/lib/browser";
 import { MarkerTreeServices } from '../marker-tree-model';
+import { PROBLEM_KIND } from './problem-marker';
 
-export const MARKER_TREE_PROPS = <TreeProps>{
+export const PROBLEM_TREE_PROPS = <TreeProps>{
     ...defaultTreeProps,
-    contextMenuPath: MARKER_CONTEXT_MENU
+    contextMenuPath: PROBLEM_KIND
 };
 
-export const MARKER_OPTIONS = <MarkerOptions>{
+export const PROBLEM_OPTIONS = <MarkerOptions>{
     kind: 'problem'
 };
 
@@ -38,8 +38,8 @@ export function createProblemTreeContainer(parent: interfaces.Container): Contai
 
     child.bind(MarkerTreeServices).toSelf();
 
-    child.rebind(TreeProps).toConstantValue(MARKER_TREE_PROPS);
-    child.bind(MarkerOptions).toConstantValue(MARKER_OPTIONS);
+    child.rebind(TreeProps).toConstantValue(PROBLEM_TREE_PROPS);
+    child.bind(MarkerOptions).toConstantValue(PROBLEM_OPTIONS);
     return child;
 }
 
diff --git a/packages/markers/src/browser/problem/problem-contribution.ts b/packages/markers/src/browser/problem/problem-contribution.ts
index f51a32965ba6d..91bd1cecc0676 100644
--- a/packages/markers/src/browser/problem/problem-contribution.ts
+++ b/packages/markers/src/browser/problem/problem-contribution.ts
@@ -6,7 +6,6 @@
 */
 
 import { injectable, inject } from 'inversify';
-import { PROBLEM_WIDGET_FACTORY_ID } from './problem-widget';
 import {
     MenuModelRegistry, Command, CommandContribution,
     MenuContribution, KeybindingContribution, KeybindingRegistry,
@@ -14,12 +13,11 @@ import {
 } from '@theia/core/lib/common';
 import { FrontendApplication } from '@theia/core/lib/browser';
 import { WidgetManager } from '@theia/core/lib/browser/widget-manager';
-
-export const MARKER_CONTEXT_MENU = 'marker-context-menu';
+import { PROBLEM_KIND } from './problem-marker';
 
 export namespace ProblemCommands {
     export const OPEN: Command = {
-        id: 'markers:open',
+        id: 'problems:open',
         label: 'Open Problem View'
     };
 }
@@ -49,7 +47,7 @@ export class ProblemContribution implements CommandContribution, MenuContributio
     }
 
     protected async openProblemsView(): Promise<void> {
-        const markerWidget = await this.widgetFactory.getOrCreateWidget(PROBLEM_WIDGET_FACTORY_ID);
+        const markerWidget = await this.widgetFactory.getOrCreateWidget(PROBLEM_KIND);
         if (!markerWidget.isAttached) {
             this.app.shell.addToMainArea(markerWidget);
         }
diff --git a/packages/markers/src/browser/problem/problem-frontend-module.ts b/packages/markers/src/browser/problem/problem-frontend-module.ts
index 0c24b754109e1..a6bfac754ccdd 100644
--- a/packages/markers/src/browser/problem/problem-frontend-module.ts
+++ b/packages/markers/src/browser/problem/problem-frontend-module.ts
@@ -6,11 +6,11 @@
 */
 
 import { ContainerModule } from 'inversify';
-import { ProblemWidget, PROBLEM_WIDGET_FACTORY_ID } from './problem-widget';
+import { ProblemWidget } from './problem-widget';
 import { ProblemContribution } from './problem-contribution';
 import { createProblemWidget } from './problem-container';
 import { CommandContribution, MenuContribution, KeybindingContribution } from "@theia/core/lib/common";
-import { ProblemManager } from './problem-marker';
+import { ProblemManager, PROBLEM_KIND } from './problem-marker';
 import { WidgetFactory } from '@theia/core/lib/browser/widget-manager';
 
 import '../../../src/browser/style/index.css';
@@ -23,7 +23,7 @@ export default new ContainerModule(bind => {
     );
 
     bind(WidgetFactory).toDynamicValue(context => ({
-        id: PROBLEM_WIDGET_FACTORY_ID,
+        id: PROBLEM_KIND,
         createWidget: () => context.container.get<ProblemWidget>(ProblemWidget)
     }));
     bind(ProblemContribution).toSelf().inSingletonScope();
diff --git a/packages/markers/src/browser/problem/problem-marker.ts b/packages/markers/src/browser/problem/problem-marker.ts
index 71b88523b6fb8..6b98986665819 100644
--- a/packages/markers/src/browser/problem/problem-marker.ts
+++ b/packages/markers/src/browser/problem/problem-marker.ts
@@ -11,13 +11,15 @@ import { injectable, inject } from 'inversify';
 import { StorageService } from '@theia/core/lib/browser/storage-service';
 import { FileSystemWatcher } from '@theia/filesystem/lib/common';
 
+export const PROBLEM_KIND = 'problem';
+
 export interface ProblemMarker extends Marker<Diagnostic> {
     kind: 'problem';
 }
 
 export namespace ProblemMarker {
     export function is(node: Marker<object>): node is ProblemMarker {
-        return 'kind' in node && node.kind === 'problem';
+        return 'kind' in node && node.kind === PROBLEM_KIND;
     }
 }
 
@@ -25,7 +27,7 @@ export namespace ProblemMarker {
 export class ProblemManager extends MarkerManager<Diagnostic> {
 
     public getKind() {
-        return 'problem';
+        return PROBLEM_KIND;
     }
 
     constructor(
diff --git a/packages/markers/src/browser/problem/problem-widget.ts b/packages/markers/src/browser/problem/problem-widget.ts
index 9aef43efb41ce..acb1edec82430 100644
--- a/packages/markers/src/browser/problem/problem-widget.ts
+++ b/packages/markers/src/browser/problem/problem-widget.ts
@@ -15,8 +15,6 @@ import { DiagnosticSeverity } from 'vscode-languageserver-types';
 import { Message } from '@phosphor/messaging';
 
 
-export const PROBLEM_WIDGET_FACTORY_ID = 'problems';
-
 @injectable()
 export class ProblemWidget extends TreeWidget {