diff --git a/projects/spectator/jest/src/public_api.ts b/projects/spectator/jest/src/public_api.ts
index 4e3b4a8e..df2bf075 100644
--- a/projects/spectator/jest/src/public_api.ts
+++ b/projects/spectator/jest/src/public_api.ts
@@ -1,5 +1,5 @@
 /// <reference types="jest" />
-/// <reference path="./lib/matchers-types.ts" />
+/// <reference path="./lib/matchers-types.ts" preserve />
 export * from './lib/dom-selectors';
 export * from './lib/mock';
 export * from './lib/spectator';
diff --git a/projects/spectator/src/public_api.ts b/projects/spectator/src/public_api.ts
index 92f32abc..aefca710 100644
--- a/projects/spectator/src/public_api.ts
+++ b/projects/spectator/src/public_api.ts
@@ -1,4 +1,4 @@
-/// <reference path="./lib/matchers-types.ts" />
+/// <reference path="./lib/matchers-types.ts" preserve />
 export { Spectator } from './lib/spectator/spectator';
 export { SpectatorOptions } from './lib/spectator/options';
 export { createComponentFactory, SpectatorFactory, SpectatorOverrides } from './lib/spectator/create-factory';