diff --git a/src/schema/effect/option.ts b/src/schema/effect/option.ts
index 82becf6..53b6abf 100644
--- a/src/schema/effect/option.ts
+++ b/src/schema/effect/option.ts
@@ -8,7 +8,7 @@ export const option = {
         z.union([option.some(schema), option.none(schema)]),
 
     some: <S extends z.ZodSchema>(schema: S) => z
-        .custom(v => Option.isOption(v) && Option.isSome(v), "Not an Option")
+        .custom<Option.Some<z.output<S>>>(v => Option.isOption(v) && Option.isSome(v), "Not an Option")
         .pipe(z.object({ value: schema }).passthrough())
         .transform<Option.Some<z.output<S>>>(identity),
 
diff --git a/src/tests.ts b/src/tests.ts
index a9cd7f0..dff7e44 100644
--- a/src/tests.ts
+++ b/src/tests.ts
@@ -3,11 +3,6 @@ import { z } from "zod"
 import { zodSchemaClass } from "./builders/ZodSchemaClassBuilder"
 import { dejsonify, jsonify } from "./schema/jsonifiable"
 import { MobXObservableZodSchemaObject } from "./traits/MobXObservableZodSchemaObject"
-import { effect } from "./schema/effect"
-
-
-const stringOption = effect.option.option(z.string())
-type T = z.output<typeof stringOption>
 
 
 const exp = zodSchemaClass