diff --git a/src/test/application/diagnostics/checks/envPathVariable.unit.test.ts b/src/test/application/diagnostics/checks/envPathVariable.unit.test.ts
index 4e39d95a9aca3..511f0ed7f8376 100644
--- a/src/test/application/diagnostics/checks/envPathVariable.unit.test.ts
+++ b/src/test/application/diagnostics/checks/envPathVariable.unit.test.ts
@@ -13,7 +13,7 @@ import { CommandOption, IDiagnosticsCommandFactory } from '../../../../client/ap
 import { DiagnosticCodes } from '../../../../client/application/diagnostics/constants';
 import { DiagnosticCommandPromptHandlerServiceId, MessageCommandPrompt } from '../../../../client/application/diagnostics/promptHandler';
 import { DiagnosticScope, IDiagnostic, IDiagnosticCommand, IDiagnosticFilterService, IDiagnosticHandlerService, IDiagnosticsService } from '../../../../client/application/diagnostics/types';
-import { IApplicationEnvironment } from '../../../../client/common/application/types';
+import { IApplicationEnvironment, IWorkspaceService } from '../../../../client/common/application/types';
 import { IPlatformService } from '../../../../client/common/platform/types';
 import { ICurrentProcess, IPathUtils } from '../../../../client/common/types';
 import { EnvironmentVariables } from '../../../../client/common/variables/types';
@@ -65,6 +65,11 @@ suite('Application Diagnostics - Checks Env Path Variable', () => {
         pathUtils.setup(p => p.delimiter).returns(() => pathDelimiter);
         serviceContainer.setup(s => s.get(typemoq.It.isValue(IPathUtils)))
             .returns(() => pathUtils.object);
+        const workspaceService = typemoq.Mock.ofType<IWorkspaceService>();
+        serviceContainer.setup(s => s.get(typemoq.It.isValue(IWorkspaceService)))
+            .returns(() => workspaceService.object);
+        workspaceService.setup(w => w.getWorkspaceFolder(typemoq.It.isAny()))
+            .returns(() => undefined);
 
         diagnosticService = new class extends EnvironmentPathVariableDiagnosticsService {
             public _clear() {
diff --git a/src/test/application/diagnostics/checks/lsNotSupported.unit.test.ts b/src/test/application/diagnostics/checks/lsNotSupported.unit.test.ts
index 756ced89760c6..1b0f12ec96b80 100644
--- a/src/test/application/diagnostics/checks/lsNotSupported.unit.test.ts
+++ b/src/test/application/diagnostics/checks/lsNotSupported.unit.test.ts
@@ -12,6 +12,7 @@ import { CommandOption, IDiagnosticsCommandFactory } from '../../../../client/ap
 import { DiagnosticCodes } from '../../../../client/application/diagnostics/constants';
 import { DiagnosticCommandPromptHandlerServiceId, MessageCommandPrompt } from '../../../../client/application/diagnostics/promptHandler';
 import { DiagnosticScope, IDiagnostic, IDiagnosticCommand, IDiagnosticFilterService, IDiagnosticHandlerService, IDiagnosticsService } from '../../../../client/application/diagnostics/types';
+import { IWorkspaceService } from '../../../../client/common/application/types';
 import { IServiceContainer } from '../../../../client/ioc/types';
 
 // tslint:disable:max-func-body-length no-any
@@ -31,6 +32,11 @@ suite('Application Diagnostics - Checks LS not supported', () => {
         serviceContainer.setup(s => s.get(TypeMoq.It.isValue(IDiagnosticFilterService))).returns(() => filterService.object);
         serviceContainer.setup(s => s.get(TypeMoq.It.isValue(IDiagnosticsCommandFactory))).returns(() => commandFactory.object);
         serviceContainer.setup(s => s.get(TypeMoq.It.isValue(IDiagnosticHandlerService), TypeMoq.It.isValue(DiagnosticCommandPromptHandlerServiceId))).returns(() => messageHandler.object);
+        const workspaceService = TypeMoq.Mock.ofType<IWorkspaceService>();
+        serviceContainer.setup(s => s.get(TypeMoq.It.isValue(IWorkspaceService)))
+            .returns(() => workspaceService.object);
+        workspaceService.setup(w => w.getWorkspaceFolder(TypeMoq.It.isAny()))
+            .returns(() => undefined);
 
         diagnosticService = new class extends LSNotSupportedDiagnosticService {
             public _clear() {
diff --git a/src/test/application/diagnostics/checks/powerShellActivation.unit.test.ts b/src/test/application/diagnostics/checks/powerShellActivation.unit.test.ts
index cfd5859ed96f1..fcbc7b52b1192 100644
--- a/src/test/application/diagnostics/checks/powerShellActivation.unit.test.ts
+++ b/src/test/application/diagnostics/checks/powerShellActivation.unit.test.ts
@@ -21,7 +21,7 @@ import {
     IDiagnosticHandlerService,
     IDiagnosticsService
 } from '../../../../client/application/diagnostics/types';
-import { IApplicationEnvironment } from '../../../../client/common/application/types';
+import { IApplicationEnvironment, IWorkspaceService } from '../../../../client/common/application/types';
 import { IPlatformService } from '../../../../client/common/platform/types';
 import { ICurrentProcess, IPathUtils } from '../../../../client/common/types';
 import { EnvironmentVariables } from '../../../../client/common/variables/types';
@@ -78,6 +78,12 @@ suite('Application Diagnostics - PowerShell Activation', () => {
         pathUtils.setup(p => p.delimiter).returns(() => pathDelimiter);
         serviceContainer.setup(s => s.get(typemoq.It.isValue(IPathUtils))).returns(() => pathUtils.object);
 
+        const workspaceService = typemoq.Mock.ofType<IWorkspaceService>();
+        serviceContainer.setup(s => s.get(typemoq.It.isValue(IWorkspaceService)))
+            .returns(() => workspaceService.object);
+        workspaceService.setup(w => w.getWorkspaceFolder(typemoq.It.isAny()))
+            .returns(() => undefined);
+
         diagnosticService = new class extends PowerShellActivationHackDiagnosticsService {
             public _clear() {
                 while (BaseDiagnosticsService.handledDiagnosticCodeKeys.length > 0) {