diff --git a/types/ember-qunit/index.d.ts b/types/ember-qunit/index.d.ts
index ed8ac13916..6b3188fdfc 100644
--- a/types/ember-qunit/index.d.ts
+++ b/types/ember-qunit/index.d.ts
@@ -2,6 +2,7 @@
 // Project: https://github.com/emberjs/ember-qunit#readme
 // Definitions by: Derek Wickern <https://github.com/dwickern>
 //                 Mike North <https://github.com/mike-north>
+//                 Steve Calvert <https://github.com/scalvert>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 2.8
 
@@ -136,7 +137,7 @@ declare module 'ember-qunit' {
         /**
          * If `false` test isolation validation will be disabled.
          */
-        setupTestIsolationValidatoin?: boolean;
+        setupTestIsolationValidation?: boolean;
     }
 
     export function start(options?: QUnitStartOptions): void;