diff --git a/packages/playwright/types/test.d.ts b/packages/playwright/types/test.d.ts
index 4b01b80002..7a60bb04be 100644
--- a/packages/playwright/types/test.d.ts
+++ b/packages/playwright/types/test.d.ts
@@ -5632,7 +5632,7 @@ export interface TestType<TestArgs extends KeyValue, WorkerArgs extends KeyValue
    * Learn more about [fixtures](https://playwright.dev/docs/test-fixtures) and [parametrizing tests](https://playwright.dev/docs/test-parameterize).
    * @param fixtures An object containing fixtures and/or options. Learn more about [fixtures format](https://playwright.dev/docs/test-fixtures).
    */
-  extend<T extends KeyValue, W extends KeyValue = {}>(fixtures: Fixtures<T, W, TestArgs, WorkerArgs>): TestType<TestArgs & T, WorkerArgs & W>;
+  extend<T extends {}, W extends {} = {}>(fixtures: Fixtures<T, W, TestArgs, WorkerArgs>): TestType<TestArgs & T, WorkerArgs & W>;
   /**
    * Returns information about the currently running test. This method can only be called during the test execution,
    * otherwise it throws.
diff --git a/utils/generate_types/overrides-test.d.ts b/utils/generate_types/overrides-test.d.ts
index f811fec269..9af97cffc8 100644
--- a/utils/generate_types/overrides-test.d.ts
+++ b/utils/generate_types/overrides-test.d.ts
@@ -164,7 +164,7 @@ export interface TestType<TestArgs extends KeyValue, WorkerArgs extends KeyValue
   use(fixtures: Fixtures<{}, {}, TestArgs, WorkerArgs>): void;
   step<T>(title: string, body: () => T | Promise<T>, options?: { box?: boolean, location?: Location, timeout?: number }): Promise<T>;
   expect: Expect<{}>;
-  extend<T extends KeyValue, W extends KeyValue = {}>(fixtures: Fixtures<T, W, TestArgs, WorkerArgs>): TestType<TestArgs & T, WorkerArgs & W>;
+  extend<T extends {}, W extends {} = {}>(fixtures: Fixtures<T, W, TestArgs, WorkerArgs>): TestType<TestArgs & T, WorkerArgs & W>;
   info(): TestInfo;
 }