diff --git a/src/vs/workbench/services/editor/test/browser/editorService.test.ts b/src/vs/workbench/services/editor/test/browser/editorService.test.ts
index 411389497114f..97fa8d6d5e57d 100644
--- a/src/vs/workbench/services/editor/test/browser/editorService.test.ts
+++ b/src/vs/workbench/services/editor/test/browser/editorService.test.ts
@@ -28,7 +28,6 @@ import { SyncDescriptor } from 'vs/platform/instantiation/common/descriptors';
 import { Registry } from 'vs/platform/registry/common/platform';
 import { FileEditorInput } from 'vs/workbench/parts/files/common/editors/fileEditorInput';
 import { UntitledEditorInput } from 'vs/workbench/common/editor/untitledEditorInput';
-import { DiffEditorInput } from 'vs/workbench/common/editor/diffEditorInput';
 import { EditorServiceImpl } from 'vs/workbench/browser/parts/editor/editor';
 
 export class TestEditorControl extends BaseEditor {
@@ -308,100 +307,6 @@ suite('Editor service', () => {
 		});
 	});
 
-	test('close editor does not dispose when editor opened in other group (diff input)', function () {
-		const partInstantiator = workbenchInstantiationService();
-
-		const part = partInstantiator.createInstance(EditorPart, 'id', false);
-		part.create(document.createElement('div'));
-		part.layout(new Dimension(400, 300));
-
-		const testInstantiationService = partInstantiator.createChild(new ServiceCollection([IEditorGroupsService, part]));
-
-		const service: IEditorService = testInstantiationService.createInstance(EditorService);
-
-		const input = testInstantiationService.createInstance(TestEditorInput, URI.parse('my://resource'));
-		const otherInput = testInstantiationService.createInstance(TestEditorInput, URI.parse('my://resource2'));
-		const diffInput = new DiffEditorInput('name', 'description', input, otherInput);
-
-		const rootGroup = part.activeGroup;
-		const rightGroup = part.addGroup(rootGroup, GroupDirection.RIGHT);
-
-		// Open input
-		return service.openEditor(diffInput, { pinned: true }).then(editor => {
-			return service.openEditor(diffInput, { pinned: true }, rightGroup).then(editor => {
-
-				// Close input
-				return rootGroup.closeEditor(diffInput).then(() => {
-					assert.equal(diffInput.isDisposed(), false);
-					assert.equal(input.isDisposed(), false);
-					assert.equal(otherInput.isDisposed(), false);
-
-					return rightGroup.closeEditor(diffInput).then(() => {
-						assert.equal(diffInput.isDisposed(), true);
-						assert.equal(input.isDisposed(), true);
-						assert.equal(otherInput.isDisposed(), true);
-					});
-				});
-			});
-		});
-	});
-
-	test('close editor disposes properly (diff input)', function () {
-		const partInstantiator = workbenchInstantiationService();
-
-		const part = partInstantiator.createInstance(EditorPart, 'id', false);
-		part.create(document.createElement('div'));
-		part.layout(new Dimension(400, 300));
-
-		const testInstantiationService = partInstantiator.createChild(new ServiceCollection([IEditorGroupsService, part]));
-
-		const service: IEditorService = testInstantiationService.createInstance(EditorService);
-
-		const input = testInstantiationService.createInstance(TestEditorInput, URI.parse('my://resource'));
-		const otherInput = testInstantiationService.createInstance(TestEditorInput, URI.parse('my://resource2'));
-		const diffInput = new DiffEditorInput('name', 'description', input, otherInput);
-
-		// Open input
-		return service.openEditor(diffInput, { pinned: true }).then(editor => {
-
-			// Close input
-			return editor.group.closeEditor(diffInput).then(() => {
-				assert.equal(diffInput.isDisposed(), true);
-				assert.equal(otherInput.isDisposed(), true);
-				assert.equal(input.isDisposed(), true);
-			});
-		});
-	});
-
-	test('close editor disposes properly (diff input, left side still opened)', function () {
-		const partInstantiator = workbenchInstantiationService();
-
-		const part = partInstantiator.createInstance(EditorPart, 'id', false);
-		part.create(document.createElement('div'));
-		part.layout(new Dimension(400, 300));
-
-		const testInstantiationService = partInstantiator.createChild(new ServiceCollection([IEditorGroupsService, part]));
-
-		const service: IEditorService = testInstantiationService.createInstance(EditorService);
-
-		const input = testInstantiationService.createInstance(TestEditorInput, URI.parse('my://resource'));
-		const otherInput = testInstantiationService.createInstance(TestEditorInput, URI.parse('my://resource2'));
-		const diffInput = new DiffEditorInput('name', 'description', input, otherInput);
-
-		// Open input
-		return service.openEditor(diffInput, { pinned: true }).then(editor => {
-			return service.openEditor(input, { pinned: true }).then(editor => {
-
-				// Close input
-				return editor.group.closeEditor(diffInput).then(() => {
-					assert.equal(diffInput.isDisposed(), true);
-					assert.equal(otherInput.isDisposed(), true);
-					assert.equal(input.isDisposed(), false);
-				});
-			});
-		});
-	});
-
 	test('open to the side', function () {
 		const partInstantiator = workbenchInstantiationService();