diff --git a/types/expect-puppeteer/tsconfig.json b/types/expect-puppeteer/tsconfig.json
index 4f88a5ccb3..7ca516e3c2 100644
--- a/types/expect-puppeteer/tsconfig.json
+++ b/types/expect-puppeteer/tsconfig.json
@@ -6,6 +6,7 @@
         ],
         "noImplicitAny": true,
         "noImplicitThis": true,
+        "strictFunctionTypes": true,
         "strictNullChecks": true,
         "baseUrl": "../",
         "typeRoots": [