diff --git a/types/chai/chai-tests.ts b/types/chai/chai-tests.ts
index ef74d17115..fba32ec840 100644
--- a/types/chai/chai-tests.ts
+++ b/types/chai/chai-tests.ts
@@ -1104,7 +1104,7 @@ class CrashyObject {
 
 suite('assert', () => {
     test('assert', () => {
-        const foo: string = 'bar';
+        const foo = 'bar' as string;
         assert(foo === 'bar', 'expected foo to equal `bar`');
 
         assert(foo === 'baz', 'expected foo to equal `bar`');
diff --git a/types/chai/tslint.json b/types/chai/tslint.json
index 86050707d8..1a0ebe45c6 100644
--- a/types/chai/tslint.json
+++ b/types/chai/tslint.json
@@ -5,7 +5,6 @@
         "callable-types": false,
         "new-parens": false,
         "no-empty-interface": false,
-        "no-inferrable-types": false,
         "no-redundant-jsdoc-2": false,
         "no-unnecessary-generics": false
     }