diff --git a/roast/tester.go b/roast/tester.go
index 44149b7..e27fd3d 100644
--- a/roast/tester.go
+++ b/roast/tester.go
@@ -23,6 +23,7 @@ import (
 	"github.com/256dpi/fire"
 	"github.com/256dpi/fire/axe"
 	"github.com/256dpi/fire/coal"
+	"github.com/256dpi/fire/stick"
 )
 
 // TODO: Support filters and sorters.
@@ -160,13 +161,18 @@ func (t *Tester) Invalidate() {
 }
 
 // List will list the provided model and validate the response if requested.
-func (t *Tester) List(tt *testing.T, model coal.Model, response []coal.Model) Result {
+func (t *Tester) List(tt *testing.T, model coal.Model, response []coal.Model, hooks ...func(res, cmp coal.Model)) Result {
 	// list resources
 	res, doc, err := t.DataClient.List(model)
 	assert.NoError(tt, err)
 
 	// validate response
 	if err == nil && response != nil {
+		for i := range response {
+			for _, cb := range hooks {
+				cb(res[i], response[i])
+			}
+		}
 		assert.Equal(tt, response, res)
 	}
 
@@ -195,13 +201,16 @@ func (t *Tester) ListError(tt *testing.T, model coal.Model, expected error) Resu
 }
 
 // Find will find the provided model and validate the response if requested.
-func (t *Tester) Find(tt *testing.T, model coal.Model, response coal.Model) Result {
+func (t *Tester) Find(tt *testing.T, model coal.Model, response coal.Model, hooks ...func(res, cmp coal.Model)) Result {
 	// find resource
 	res, doc, err := t.DataClient.Find(model)
 	assert.NoError(tt, err)
 
 	// validate response
 	if err == nil && response != nil {
+		for _, cb := range hooks {
+			cb(res, response)
+		}
 		assert.Equal(tt, response, res)
 	}
 
@@ -231,7 +240,7 @@ func (t *Tester) FindError(tt *testing.T, model coal.Model, expected error) Resu
 
 // Create will create the provided model and validate the response and result
 // if requested.
-func (t *Tester) Create(tt *testing.T, model, response, result coal.Model) Result {
+func (t *Tester) Create(tt *testing.T, model, response, result coal.Model, hooks ...func(res, cmp coal.Model)) Result {
 	// create resource
 	res, doc, err := t.DataClient.Create(model)
 	assert.NoError(tt, err)
@@ -239,6 +248,9 @@ func (t *Tester) Create(tt *testing.T, model, response, result coal.Model) Resul
 	// validate response
 	if err == nil && response != nil {
 		response.GetBase().DocID = res.ID()
+		for _, cb := range hooks {
+			cb(res, response)
+		}
 		assert.Equal(tt, response, res)
 	}
 
@@ -247,6 +259,9 @@ func (t *Tester) Create(tt *testing.T, model, response, result coal.Model) Resul
 		result.GetBase().DocID = res.ID()
 		actual := coal.GetMeta(model).Make()
 		t.Tester.Fetch(actual, res.ID())
+		for _, cb := range hooks {
+			cb(actual, result)
+		}
 		assert.Equal(tt, result, actual)
 	}
 
@@ -276,13 +291,16 @@ func (t *Tester) CreateError(tt *testing.T, model coal.Model, expected error) Re
 
 // Update will update the provided model and validate the response and result
 // if requested.
-func (t *Tester) Update(tt *testing.T, model, response, result coal.Model) Result {
+func (t *Tester) Update(tt *testing.T, model, response, result coal.Model, hooks ...func(res, cmp coal.Model)) Result {
 	// update resource
 	res, doc, err := t.DataClient.Update(model)
 	assert.NoError(tt, err)
 
 	// validate response
 	if err == nil && response != nil {
+		for _, cb := range hooks {
+			cb(res, response)
+		}
 		assert.Equal(tt, response, res)
 	}
 
@@ -290,6 +308,9 @@ func (t *Tester) Update(tt *testing.T, model, response, result coal.Model) Resul
 	if err == nil && result != nil {
 		actual := coal.GetMeta(model).Make()
 		t.Tester.Fetch(actual, model.ID())
+		for _, cb := range hooks {
+			cb(actual, result)
+		}
 		assert.Equal(tt, result, actual)
 	}
 
@@ -318,7 +339,7 @@ func (t *Tester) UpdateError(tt *testing.T, model coal.Model, expected error) Re
 }
 
 // Delete will delete the provided model and validate the result.
-func (t *Tester) Delete(tt *testing.T, model, result coal.Model) Result {
+func (t *Tester) Delete(tt *testing.T, model, result coal.Model, hooks ...func(res, cmp coal.Model)) Result {
 	// delete resource
 	err := t.DataClient.Delete(model)
 	assert.NoError(tt, err)
@@ -327,6 +348,9 @@ func (t *Tester) Delete(tt *testing.T, model, result coal.Model) Result {
 	if err == nil && result != nil {
 		actual := coal.GetMeta(model).Make()
 		t.Tester.Fetch(actual, model.ID())
+		for _, fn := range hooks {
+			fn(actual, result)
+		}
 		assert.Equal(tt, result, actual)
 	}
 
@@ -478,3 +502,21 @@ func (t *Tester) Await(tt *testing.T, timeout time.Duration, fns ...func()) int
 
 	return n
 }
+
+// CopyHook will copy fields from the response to the result.
+func CopyHook(fields ...string) func(res, cmp coal.Model) {
+	return func(res, cmp coal.Model) {
+		for _, field := range fields {
+			stick.MustSet(cmp, field, stick.MustGet(res, field))
+		}
+	}
+}
+
+// SkipHook will copy fields from the result to the response.
+func SkipHook(fields ...string) func(res, cmp coal.Model) {
+	return func(res, cmp coal.Model) {
+		for _, field := range fields {
+			stick.MustSet(res, field, stick.MustGet(cmp, field))
+		}
+	}
+}
diff --git a/roast/tester_test.go b/roast/tester_test.go
index 930fc0d..d183c7e 100644
--- a/roast/tester_test.go
+++ b/roast/tester_test.go
@@ -44,6 +44,22 @@ func TestTester(t *testing.T) {
 	tt.Delete(t, post, nil)
 }
 
+func TestTesterHooks(t *testing.T) {
+	post1 := &fooModel{String: "String"}
+	post2 := &fooModel{}
+
+	CopyHook("String")(post1, post2)
+	assert.Equal(t, "String", post1.String)
+	assert.Equal(t, "String", post2.String)
+
+	post1 = &fooModel{String: "String"}
+	post2 = &fooModel{}
+
+	SkipHook("String")(post1, post2)
+	assert.Zero(t, post1.String)
+	assert.Zero(t, post2.String)
+}
+
 func TestTesterErrors(t *testing.T) {
 	tt := NewTester(Config{
 		Models: models.All(),