diff --git a/types/ember-testing-helpers/tsconfig.json b/types/ember-testing-helpers/tsconfig.json
index e4aa9692bf..aaf474ecba 100644
--- a/types/ember-testing-helpers/tsconfig.json
+++ b/types/ember-testing-helpers/tsconfig.json
@@ -5,7 +5,9 @@
             "es6",
             "dom"
         ],
-        "strict": true,
+        "noImplicitAny": true,
+        "noImplicitThis": false,
+        "strictNullChecks": true,
         "baseUrl": "../",
         "typeRoots": [
             "../"