diff --git a/src/vs/workbench/services/configurationResolver/test/node/configurationResolverService.test.ts b/src/vs/workbench/services/configurationResolver/test/node/configurationResolverService.test.ts
index 1b8b94b15da28322a8d4011e1b1ca767e25628c3..9f3c2925716896dda482ce872ea92d2053f24fb3 100644
--- a/src/vs/workbench/services/configurationResolver/test/node/configurationResolverService.test.ts
+++ b/src/vs/workbench/services/configurationResolver/test/node/configurationResolverService.test.ts
@@ -18,10 +18,12 @@ suite('Configuration Resolver Service', () => {
 	let configurationResolverService: IConfigurationResolverService;
 	let envVariables: { [key: string]: string } = { key1: 'Value for Key1', key2: 'Value for Key2' };
 	let mockCommandService: MockCommandService;
+	let editorService: TestEditorService;
 
 	setup(() => {
 		mockCommandService = new MockCommandService();
-		configurationResolverService = new ConfigurationResolverService(uri.parse('file:///VSCode/workspaceLocation'), envVariables, new TestEditorService(), TestEnvironmentService, new TestConfigurationService(), mockCommandService);
+		editorService = new TestEditorService();
+		configurationResolverService = new ConfigurationResolverService(uri.parse('file:///VSCode/workspaceLocation'), envVariables, editorService, TestEnvironmentService, new TestConfigurationService(), mockCommandService);
 	});
 
 	teardown(() => {
@@ -42,7 +44,7 @@ suite('Configuration Resolver Service', () => {
 	});
 
 	test('current selected line number', () => {
-		assert.strictEqual(configurationResolverService.resolve('abc ${lineNumber} xyz'), 'abc 15 xyz');
+		assert.strictEqual(configurationResolverService.resolve('abc ${lineNumber} xyz'), `abc ${editorService.mockLineNumber} xyz`);
 	});
 
 	test('substitute many', () => {
diff --git a/src/vs/workbench/test/workbenchTestServices.ts b/src/vs/workbench/test/workbenchTestServices.ts
index a574451b0c0da81806733e68693980a0ba0d62f8..fe7b87be2644c9b9315e0c78bdab4b60a136484b 100644
--- a/src/vs/workbench/test/workbenchTestServices.ts
+++ b/src/vs/workbench/test/workbenchTestServices.ts
@@ -468,11 +468,13 @@ export class TestEditorService implements IWorkbenchEditorService {
 	public activeEditorInput: IEditorInput;
 	public activeEditorOptions: IEditorOptions;
 	public activeEditorPosition: Position;
+	public mockLineNumber: number;
 
 	private callback: (method: string) => void;
 
 	constructor(callback?: (method: string) => void) {
 		this.callback = callback || ((s: string) => { });
+		this.mockLineNumber = 15;
 	}
 
 	public openEditors(inputs): Promise {
@@ -505,7 +507,7 @@ export class TestEditorService implements IWorkbenchEditorService {
 			getId: () => { return null; },
 			getControl: () => {
 				return {
-					getSelection: () => { return { positionLineNumber: 15 }; }
+					getSelection: () => { return { positionLineNumber: this.mockLineNumber }; }
 				};
 			},
 			focus: () => { },