diff --git a/src/vs/vscode.proposed.d.ts b/src/vs/vscode.proposed.d.ts
index 16da532c299..7b4251c5e13 100644
--- a/src/vs/vscode.proposed.d.ts
+++ b/src/vs/vscode.proposed.d.ts
@@ -2329,7 +2329,7 @@ declare module 'vscode' {
 		 * @param cancellationToken Token that signals the used asked to abort the test run.
 		 */
 		// eslint-disable-next-line vscode-dts-provider-naming
-		runTests?(options: TestRun<T>, cancellationToken: CancellationToken): ProviderResult<void>;
+		runTests(options: TestRun<T>, cancellationToken: CancellationToken): ProviderResult<void>;
 	}
 
 	/**
diff --git a/src/vs/workbench/api/common/extHostTesting.ts b/src/vs/workbench/api/common/extHostTesting.ts
index da3c546066d..4084602c9e6 100644
--- a/src/vs/workbench/api/common/extHostTesting.ts
+++ b/src/vs/workbench/api/common/extHostTesting.ts
@@ -239,7 +239,7 @@ export class ExtHostTesting implements ExtHostTestingShape {
 	 */
 	public async $runTestsForProvider(req: RunTestForProviderRequest, cancellation: CancellationToken): Promise<void> {
 		const provider = this.providers.get(req.providerId);
-		if (!provider || !provider.runTests) {
+		if (!provider) {
 			return;
 		}