diff --git a/src/builders/ZodSchemaClassBuilder.ts b/src/builders/ZodSchemaClassBuilder.ts
index 1ad8caa..0445816 100644
--- a/src/builders/ZodSchemaClassBuilder.ts
+++ b/src/builders/ZodSchemaClassBuilder.ts
@@ -4,10 +4,8 @@ import { JsonifiableObject } from "type-fest/source/jsonifiable"
 import { z } from "zod"
 import { ZodSchemaAbstractClass } from "../shapes/ZodSchemaClass"
 import { DejsonifiableZodSchemaObject } from "../traits/DejsonifiableZodSchemaObject"
-import { ExtendableZodSchemaObject } from "../traits/ExtendableZodSchemaObject"
-import { InstantiableZodSchemaObject } from "../traits/InstantiableZodSchemaObject"
 import { JsonifiableZodSchemaObject } from "../traits/JsonifiableZodSchemaObject"
-import { ZodSchemaObjectInstantiationSchemas } from "../traits/ZodSchemaObjectInstantiationSchemas"
+import { ZodSchemaObject } from "../traits/ZodSchemaObject"
 import { StaticMembers } from "../util"
 
 
@@ -34,7 +32,7 @@ extends TraitExpressionBuilder<Superclass, Traits> {
     >(
         this: ZodSchemaClassBuilder<Super, Traits>,
 
-        props: {
+        { schema, schemaWithDefaultValues }: {
             schema: z.ZodObject<SchemaT, SchemaUnknownKeys, SchemaCatchall, Values, Values>
 
             schemaWithDefaultValues: (
@@ -42,10 +40,7 @@ extends TraitExpressionBuilder<Superclass, Traits> {
             ) => z.ZodObject<SchemaWithDefaultValuesT, SchemaWithDefaultValuesUnknownKeys, SchemaWithDefaultValuesCatchall, Values, PartialValues>
         },
     ) {
-        class Schemas extends (this.expressionSuperclass as AbstractClass<object, []>) {
-            static readonly schema                  = props.schema
-            static readonly schemaWithDefaultValues = props.schemaWithDefaultValues(props.schema)
-
+        class ZodSchemaObjectConstructor extends (this.expressionSuperclass as AbstractClass<object, []>) {
             constructor(values: Values) {
                 super()
                 Object.assign(this, values)
@@ -53,21 +48,15 @@ extends TraitExpressionBuilder<Superclass, Traits> {
         }
 
         return new this.constructor(
-            Schemas as unknown as (
+            ZodSchemaObjectConstructor as unknown as (
                 AbstractClass<
                     InstanceType<Super> & Values,
-                    ConstructorParameters<typeof Schemas>
+                    [values: Values]
                 > &
-                StaticMembers<Super> &
-                StaticMembers<typeof Schemas>
+                StaticMembers<Super>
             ),
 
-            [
-                ...this.expressionTraits,
-                ZodSchemaObjectInstantiationSchemas,
-                InstantiableZodSchemaObject,
-                ExtendableZodSchemaObject,
-            ],
+            [...this.expressionTraits, ZodSchemaObject(schema, schemaWithDefaultValues)],
         )
     }
 
diff --git a/src/tests.ts b/src/tests.ts
index 302199c..fa638e9 100644
--- a/src/tests.ts
+++ b/src/tests.ts
@@ -1,69 +1,24 @@
-import { Implements, expression } from "@thilawyn/traitify-ts"
-import { Class } from "type-fest"
+import { Implements } from "@thilawyn/traitify-ts"
 import { z } from "zod"
-import { ZodSchemaObject } from "./traits/ZodSchemaObject"
-import { StaticMembers } from "./util"
+import { zodSchemaClass } from "./builders/ZodSchemaClassBuilder"
+import { MobXObservableZodSchemaObject } from "./traits/MobXObservableZodSchemaObject"
 
 
-// const exp = zodSchemaClass
-//     .schema({
-//         schema: z.object({
-//             /** User ID */
-//             id: z.bigint(),
+const exp = zodSchemaClass
+    .schema({
+        schema: z.object({
+            /** User ID */
+            id: z.bigint(),
 
-//             /** Username */
-//             name: z.string(),
-//         }),
+            /** Username */
+            name: z.string(),
+        }),
 
-//         schemaWithDefaultValues: s => s.extend({
-//             id: s.shape.id.default(-1n),
-//         }),
-//     })
-//     .jsonifiable({
-//         jsonifySchema: s => s.extend({
-//             id: jsonify.bigint(s.shape.id)
-//         }),
-
-//         dejsonifySchema: s => s.extend({
-//             id: dejsonify.bigint(s.shape.id)
-//         }),
-//     })
-//     .expresses(MobXObservableZodSchemaObject)
-//     .build()
-
-const schema = z.object({
-    /** User ID */
-    id: z.bigint(),
-
-    /** Username */
-    name: z.string(),
-})
-const schemaWithDefaultsValues = schema.extend({
-    id: schema.shape.id.default(-1n),
-})
-class UserSchemas {
-    static readonly schema = schema
-    static readonly schemaWithDefaultValues = schemaWithDefaultsValues
-
-    constructor(values: z.output<typeof schema>) {
-        Object.assign(this, values)
-    }
-}
-
-const exp = expression
-    .extends(UserSchemas as (
-        Class<UserSchemas & z.output<typeof schema>> &
-        StaticMembers<typeof UserSchemas>
-    ))
-    .expresses(
-        ZodSchemaObject(
-            schema,
-
-            s => s.extend({
-                id: s.shape.id.default(-1n),
-            }),
-        )
-    )
+        schemaWithDefaultValues: s => s.extend({
+            id: s.shape.id.default(-1n),
+        }),
+    })
+    .expresses(MobXObservableZodSchemaObject)
     .build()
 
 
diff --git a/src/traits/InstantiableZodSchemaObject.ts b/src/traits/InstantiableZodSchemaObject.ts
deleted file mode 100644
index 1817ab6..0000000
--- a/src/traits/InstantiableZodSchemaObject.ts
+++ /dev/null
@@ -1,90 +0,0 @@
-import { TraitStaticMembers, trait } from "@thilawyn/traitify-ts"
-import { HasRequiredKeys } from "type-fest"
-import { z } from "zod"
-import { ZodSchemaClass } from "../shapes/ZodSchemaClass"
-import { parseZodTypeEffect } from "../util"
-import { ZodSchemaObjectInstantiationSchemas } from "./ZodSchemaObjectInstantiationSchemas"
-
-
-type ZodSchemaObjectInstantiationSchemasStaticMembers = TraitStaticMembers<typeof ZodSchemaObjectInstantiationSchemas>
-
-type NewZodSchemaInstanceInput<
-    Values        extends object,
-    DefaultValues extends Partial<Values>,
-> = {
-    [Key in Exclude<keyof Values, keyof DefaultValues>]: Values[Key]
-} & {
-    [Key in keyof DefaultValues]?: Key extends keyof Values
-        ? Values[Key]
-        : never
-}
-
-type ParseParamsArgs = [] | [params: Partial<z.ParseParams>]
-
-type NewZodSchemaInstanceArgs<Input extends object> = (
-    HasRequiredKeys<Input> extends true
-        ? [values: Input, ...args: ParseParamsArgs]
-        : [] | [values: Input, ...args: ParseParamsArgs]
-)
-
-
-export const InstantiableZodSchemaObject = trait
-    .implement(Super => class InstantiableZodSchemaObject extends Super {
-        static create<
-            Instance                           extends Values,
-
-            SchemaWithDefaultValuesT           extends z.ZodRawShape,
-            SchemaWithDefaultValuesUnknownKeys extends z.UnknownKeysParam,
-            SchemaWithDefaultValuesCatchall    extends z.ZodTypeAny,
-
-            Values                             extends object,
-            PartialValues                      extends Partial<Values>,
-        >(
-            this: (
-                ZodSchemaClass<Instance, any, any, any, SchemaWithDefaultValuesT, SchemaWithDefaultValuesUnknownKeys, SchemaWithDefaultValuesCatchall, Values, PartialValues> &
-                ZodSchemaObjectInstantiationSchemasStaticMembers
-            ),
-            ...[values, params]: NewZodSchemaInstanceArgs<PartialValues>
-        ) {
-            return this.instantiationSchemaWithDefaultValues().parse(values, params)
-        }
-
-        static async createPromise<
-            Instance                           extends Values,
-
-            SchemaWithDefaultValuesT           extends z.ZodRawShape,
-            SchemaWithDefaultValuesUnknownKeys extends z.UnknownKeysParam,
-            SchemaWithDefaultValuesCatchall    extends z.ZodTypeAny,
-
-            Values                             extends object,
-            PartialValues                      extends Partial<Values>,
-        >(
-            this: (
-                ZodSchemaClass<Instance, any, any, any, SchemaWithDefaultValuesT, SchemaWithDefaultValuesUnknownKeys, SchemaWithDefaultValuesCatchall, Values, PartialValues> &
-                ZodSchemaObjectInstantiationSchemasStaticMembers
-            ),
-            ...[values, params]: NewZodSchemaInstanceArgs<PartialValues>
-        ) {
-            return this.instantiationSchemaWithDefaultValues().parseAsync(values, params)
-        }
-
-        static createEffect<
-            Instance                           extends Values,
-
-            SchemaWithDefaultValuesT           extends z.ZodRawShape,
-            SchemaWithDefaultValuesUnknownKeys extends z.UnknownKeysParam,
-            SchemaWithDefaultValuesCatchall    extends z.ZodTypeAny,
-
-            Values                             extends object,
-            PartialValues                      extends Partial<Values>,
-        >(
-            this: (
-                ZodSchemaClass<Instance, any, any, any, SchemaWithDefaultValuesT, SchemaWithDefaultValuesUnknownKeys, SchemaWithDefaultValuesCatchall, Values, PartialValues> &
-                ZodSchemaObjectInstantiationSchemasStaticMembers
-            ),
-            ...[values, params]: NewZodSchemaInstanceArgs<PartialValues>
-        ) {
-            return parseZodTypeEffect(this.instantiationSchemaWithDefaultValues(), values, params)
-        }
-    })
-    .build()
diff --git a/src/traits/ZodSchemaObjectInstantiationSchemas.ts b/src/traits/ZodSchemaObjectInstantiationSchemas.ts
deleted file mode 100644
index 4af87cb..0000000
--- a/src/traits/ZodSchemaObjectInstantiationSchemas.ts
+++ /dev/null
@@ -1,37 +0,0 @@
-import { trait } from "@thilawyn/traitify-ts"
-import { z } from "zod"
-import { ZodSchemaClass } from "../shapes/ZodSchemaClass"
-
-
-export const ZodSchemaObjectInstantiationSchemas = trait
-    .implement(Super => class ZodSchemaObjectInstantiationSchemas extends Super {
-        static instantiationSchema<
-            Instance          extends Values,
-
-            SchemaT           extends z.ZodRawShape,
-            SchemaUnknownKeys extends z.UnknownKeysParam,
-            SchemaCatchall    extends z.ZodTypeAny,
-
-            Values            extends object,
-        >(
-            this: ZodSchemaClass<Instance, SchemaT, SchemaUnknownKeys, SchemaCatchall, any, any, any, Values, any>,
-        ) {
-            return this.schema.transform(values => new this(values))
-        }
-
-        static instantiationSchemaWithDefaultValues<
-            Instance                           extends Values,
-
-            SchemaWithDefaultValuesT           extends z.ZodRawShape,
-            SchemaWithDefaultValuesUnknownKeys extends z.UnknownKeysParam,
-            SchemaWithDefaultValuesCatchall    extends z.ZodTypeAny,
-
-            Values                             extends object,
-            PartialValues                      extends Partial<Values>,
-        >(
-            this: ZodSchemaClass<Instance, any, any, any, SchemaWithDefaultValuesT, SchemaWithDefaultValuesUnknownKeys, SchemaWithDefaultValuesCatchall, Values, PartialValues>,
-        ) {
-            return this.schemaWithDefaultValues.transform(values => new this(values))
-        }
-    })
-    .build()