diff --git a/questions/30301-medium-isodd/test-cases.ts b/questions/30301-medium-isodd/test-cases.ts
index 6ac273bf..691ee92d 100644
--- a/questions/30301-medium-isodd/test-cases.ts
+++ b/questions/30301-medium-isodd/test-cases.ts
@@ -7,5 +7,6 @@ type cases = [
   Expect<Equal<IsOdd<1926>, false>>,
   Expect<Equal<IsOdd<2.3>, false>>,
   Expect<Equal<IsOdd<3e23>, false>>,
+  Expect<Equal<IsOdd<3e0>, true>>,
   Expect<Equal<IsOdd<number>, false>>,
 ]