diff --git a/src/features/dataset/index.spec.ts b/src/features/dataset/index.spec.ts
index 13ffea9..50be191 100644
--- a/src/features/dataset/index.spec.ts
+++ b/src/features/dataset/index.spec.ts
@@ -22,7 +22,7 @@ describe('dataset', () => {
             const actual = createDataSet(defaultData);
 
             // Assert
-            expect(actual).toMatchObject({ data: defaultData })
+            expect(actual).toMatchObject({ value: defaultData() })
         });
 
         it('can sort by a property', async () => {
@@ -46,7 +46,7 @@ describe('dataset', () => {
             const actual = createDataSet(defaultData, { group: { by: 'name' } });
 
             // Assert
-            expect(actual).toEqual(expect.objectContaining({ data: defaultData }))
+            expect(actual).toEqual(expect.objectContaining({ value: defaultData() }))
         });
 
         describe('mutate', () => {
diff --git a/src/features/dataset/index.ts b/src/features/dataset/index.ts
index 780b1ac..1423ac7 100644
--- a/src/features/dataset/index.ts
+++ b/src/features/dataset/index.ts
@@ -100,6 +100,8 @@ export const createDataSet = <T extends Record<string, any>>(data: Accessor<T[]>
     });
 
     const apply = (data: T[], mutations: Mutation[]) => {
+        console.log('APPLY', data, mutations);
+
         for (const mutation of mutations) {
             const path = mutation.key.split('.');
 
@@ -162,6 +164,8 @@ export const createDataSet = <T extends Record<string, any>>(data: Accessor<T[]>
         const next = data();
         const nextValue = apply(deepCopy(next), untrack(() => mutations()));
 
+        console.log('EFFECT IS CALLED');
+
         setState('value', nextValue);
         setState('snapshot', next);
     });