diff --git a/internal/deployment/fixture/app_test.go b/internal/deployment/fixture/app_test.go
new file mode 100644
index 0000000..399b82b
--- /dev/null
+++ b/internal/deployment/fixture/app_test.go
@@ -0,0 +1,50 @@
+package fixture_test
+
+import (
+	"testing"
+
+	"github.com/YuukanOO/seelf/internal/deployment/domain"
+	"github.com/YuukanOO/seelf/internal/deployment/fixture"
+	"github.com/YuukanOO/seelf/pkg/assert"
+)
+
+func Test_App(t *testing.T) {
+	t.Run("should be able to build a random app", func(t *testing.T) {
+		app := fixture.App()
+
+		assert.NotZero(t, app.ID())
+	})
+
+	t.Run("should be able to build an app with a given name", func(t *testing.T) {
+		app := fixture.App(fixture.WithAppName("foo"))
+
+		created := assert.EventIs[domain.AppCreated](t, &app, 0)
+		assert.Equal(t, "foo", created.Name)
+	})
+
+	t.Run("should be able to build an app created by a specific user id", func(t *testing.T) {
+		app := fixture.App(fixture.WithAppCreatedBy("uid"))
+
+		created := assert.EventIs[domain.AppCreated](t, &app, 0)
+		assert.Equal(t, "uid", created.Created.By())
+	})
+
+	t.Run("should be able to build an app with given production and staging configuration", func(t *testing.T) {
+		production := domain.NewEnvironmentConfig("production_id")
+		staging := domain.NewEnvironmentConfig("staging_id")
+		app := fixture.App(fixture.WithEnvironmentConfig(production, staging))
+
+		created := assert.EventIs[domain.AppCreated](t, &app, 0)
+		assert.DeepEqual(t, production, created.Production)
+		assert.DeepEqual(t, staging, created.Staging)
+	})
+
+	t.Run("should be able to build an app with given production configuration", func(t *testing.T) {
+		config := domain.NewEnvironmentConfig("production_id")
+		app := fixture.App(fixture.WithProductionConfig(config))
+
+		created := assert.EventIs[domain.AppCreated](t, &app, 0)
+		assert.DeepEqual(t, config, created.Production)
+		assert.NotEqual(t, config.Target(), created.Staging.Target())
+	})
+}
diff --git a/internal/deployment/fixture/database_test.go b/internal/deployment/fixture/database_test.go
new file mode 100644
index 0000000..7879c3e
--- /dev/null
+++ b/internal/deployment/fixture/database_test.go
@@ -0,0 +1,53 @@
+package fixture_test
+
+import (
+	"testing"
+
+	auth "github.com/YuukanOO/seelf/internal/auth/domain"
+	authfixture "github.com/YuukanOO/seelf/internal/auth/fixture"
+	"github.com/YuukanOO/seelf/internal/deployment/domain"
+	"github.com/YuukanOO/seelf/internal/deployment/fixture"
+	"github.com/YuukanOO/seelf/pkg/assert"
+)
+
+func Test_Database(t *testing.T) {
+	t.Run("should be able to prepare a database without seeding it", func(t *testing.T) {
+		ctx := fixture.PrepareDatabase(t)
+
+		assert.NotNil(t, ctx)
+		assert.NotNil(t, ctx.Config)
+		assert.NotNil(t, ctx.AppsStore)
+		assert.NotNil(t, ctx.TargetsStore)
+		assert.NotNil(t, ctx.AppsStore)
+		assert.NotNil(t, ctx.DeploymentsStore)
+		assert.NotNil(t, ctx.RegistriesStore)
+		assert.NotNil(t, ctx.Dispatcher)
+		assert.HasLength(t, 0, ctx.Dispatcher.Signals())
+		assert.HasLength(t, 0, ctx.Dispatcher.Requests())
+	})
+
+	t.Run("should seed correctly and attach the first user id to the created context", func(t *testing.T) {
+		user := authfixture.User()
+		target := fixture.Target(fixture.WithTargetCreatedBy(user.ID()))
+		config := domain.NewEnvironmentConfig(target.ID())
+		app := fixture.App(
+			fixture.WithEnvironmentConfig(config, config),
+			fixture.WithAppCreatedBy(user.ID()),
+		)
+		registry := fixture.Registry(fixture.WithRegistryCreatedBy(user.ID()))
+		deployment := fixture.Deployment(
+			fixture.FromApp(app),
+			fixture.WithDeploymentRequestedBy(user.ID()),
+		)
+
+		ctx := fixture.PrepareDatabase(t,
+			fixture.WithUsers(&user),
+			fixture.WithTargets(&target),
+			fixture.WithApps(&app),
+			fixture.WithRegistries(&registry),
+			fixture.WithDeployments(&deployment),
+		)
+
+		assert.Equal(t, user.ID(), auth.CurrentUser(ctx.Context).Get(""))
+	})
+}
diff --git a/internal/deployment/fixture/deployment_test.go b/internal/deployment/fixture/deployment_test.go
new file mode 100644
index 0000000..fa0ef58
--- /dev/null
+++ b/internal/deployment/fixture/deployment_test.go
@@ -0,0 +1,63 @@
+package fixture_test
+
+import (
+	"testing"
+
+	"github.com/YuukanOO/seelf/internal/deployment/domain"
+	"github.com/YuukanOO/seelf/internal/deployment/fixture"
+	"github.com/YuukanOO/seelf/pkg/assert"
+)
+
+func Test_Deployment(t *testing.T) {
+	t.Run("should be able to create a new deployment", func(t *testing.T) {
+		deployment := fixture.Deployment()
+
+		assert.NotZero(t, deployment.ID())
+		assert.Equal(t, domain.Production, deployment.Config().Environment())
+	})
+
+	t.Run("should be able to create a new deployment from a given app", func(t *testing.T) {
+		app := fixture.App()
+		deployment := fixture.Deployment(fixture.FromApp(app))
+
+		created := assert.EventIs[domain.DeploymentCreated](t, &deployment, 0)
+		assert.Equal(t, app.ID(), created.ID.AppID())
+	})
+
+	t.Run("should be able to create a new deployment requested by a given user id", func(t *testing.T) {
+		deployment := fixture.Deployment(fixture.WithDeploymentRequestedBy("uid"))
+
+		created := assert.EventIs[domain.DeploymentCreated](t, &deployment, 0)
+		assert.Equal(t, "uid", created.Requested.By())
+	})
+
+	t.Run("should be able to create a new deployment with a given source data", func(t *testing.T) {
+		source := fixture.SourceData()
+		deployment := fixture.Deployment(fixture.WithSourceData(source))
+
+		created := assert.EventIs[domain.DeploymentCreated](t, &deployment, 0)
+		assert.Equal(t, source, created.Source)
+	})
+
+	t.Run("should be able to create a new deployment with a given environment", func(t *testing.T) {
+		deployment := fixture.Deployment(fixture.ForEnvironment(domain.Staging))
+
+		created := assert.EventIs[domain.DeploymentCreated](t, &deployment, 0)
+		assert.Equal(t, domain.Staging, created.Config.Environment())
+	})
+}
+
+func Test_SourceData(t *testing.T) {
+	t.Run("should be able to create a source data", func(t *testing.T) {
+		source := fixture.SourceData()
+
+		assert.Equal(t, "test", source.Kind())
+		assert.False(t, source.NeedVersionControl())
+	})
+
+	t.Run("should be able to create a source data with version control needed", func(t *testing.T) {
+		source := fixture.SourceData(fixture.WithVersionControlNeeded())
+
+		assert.True(t, source.NeedVersionControl())
+	})
+}
diff --git a/internal/deployment/fixture/registry_test.go b/internal/deployment/fixture/registry_test.go
new file mode 100644
index 0000000..2bf497c
--- /dev/null
+++ b/internal/deployment/fixture/registry_test.go
@@ -0,0 +1,40 @@
+package fixture_test
+
+import (
+	"testing"
+
+	"github.com/YuukanOO/seelf/internal/deployment/domain"
+	"github.com/YuukanOO/seelf/internal/deployment/fixture"
+	"github.com/YuukanOO/seelf/pkg/assert"
+	"github.com/YuukanOO/seelf/pkg/must"
+)
+
+func Test_Registry(t *testing.T) {
+	t.Run("should be able to create a random registry", func(t *testing.T) {
+		registry := fixture.Registry()
+
+		assert.NotZero(t, registry.ID())
+	})
+
+	t.Run("should be able to create a registry with a given name", func(t *testing.T) {
+		registry := fixture.Registry(fixture.WithRegistryName("my-registry"))
+
+		created := assert.EventIs[domain.RegistryCreated](t, &registry, 0)
+		assert.Equal(t, "my-registry", created.Name)
+	})
+
+	t.Run("should be able to create a registry created by a given user id", func(t *testing.T) {
+		registry := fixture.Registry(fixture.WithRegistryCreatedBy("uid"))
+
+		created := assert.EventIs[domain.RegistryCreated](t, &registry, 0)
+		assert.Equal(t, "uid", created.Created.By())
+	})
+
+	t.Run("should be able to create a registry with a given url", func(t *testing.T) {
+		url := must.Panic(domain.UrlFrom("https://my-registry.com"))
+		registry := fixture.Registry(fixture.WithUrl(url))
+
+		created := assert.EventIs[domain.RegistryCreated](t, &registry, 0)
+		assert.Equal(t, url, created.Url)
+	})
+}
diff --git a/internal/deployment/fixture/target_test.go b/internal/deployment/fixture/target_test.go
new file mode 100644
index 0000000..32ddba7
--- /dev/null
+++ b/internal/deployment/fixture/target_test.go
@@ -0,0 +1,76 @@
+package fixture_test
+
+import (
+	"testing"
+
+	"github.com/YuukanOO/seelf/internal/deployment/domain"
+	"github.com/YuukanOO/seelf/internal/deployment/fixture"
+	"github.com/YuukanOO/seelf/pkg/assert"
+)
+
+func Test_Target(t *testing.T) {
+	t.Run("should be able to create a target", func(t *testing.T) {
+		target := fixture.Target()
+
+		assert.NotZero(t, target.ID())
+	})
+
+	t.Run("should be able to create a target with a given name", func(t *testing.T) {
+		target := fixture.Target(fixture.WithTargetName("name"))
+
+		created := assert.EventIs[domain.TargetCreated](t, &target, 0)
+		assert.Equal(t, "name", created.Name)
+	})
+
+	t.Run("should be able to create a target with a given user id", func(t *testing.T) {
+		target := fixture.Target(fixture.WithTargetCreatedBy("id"))
+
+		created := assert.EventIs[domain.TargetCreated](t, &target, 0)
+		assert.Equal(t, "id", created.Created.By())
+	})
+
+	t.Run("should be able to create a target with a given provider config", func(t *testing.T) {
+		config := fixture.ProviderConfig()
+		target := fixture.Target(fixture.WithProviderConfig(config))
+
+		created := assert.EventIs[domain.TargetCreated](t, &target, 0)
+		assert.DeepEqual(t, config, created.Provider)
+	})
+}
+
+func Test_ProviderConfig(t *testing.T) {
+	t.Run("should be able to create a provider config", func(t *testing.T) {
+		config := fixture.ProviderConfig()
+
+		assert.NotZero(t, config.Fingerprint())
+		assert.NotZero(t, config.Kind())
+	})
+
+	t.Run("should be able to create a provider config with a given fingerprint", func(t *testing.T) {
+		config := fixture.ProviderConfig(fixture.WithFingerprint("fingerprint"))
+
+		assert.Equal(t, "fingerprint", config.Fingerprint())
+	})
+
+	t.Run("should be able to create a provider config with a given kind", func(t *testing.T) {
+		config := fixture.ProviderConfig(fixture.WithKind("kind"))
+
+		assert.Equal(t, "kind", config.Kind())
+	})
+
+	t.Run("should be able to create a provider config with a given data", func(t *testing.T) {
+		one := fixture.ProviderConfig(
+			fixture.WithKind("kind"),
+			fixture.WithFingerprint("fingerprint"),
+			fixture.WithData("data"))
+		two := fixture.ProviderConfig(
+			fixture.WithKind("kind"),
+			fixture.WithFingerprint("fingerprint"),
+			fixture.WithData("data"))
+		three := fixture.ProviderConfig()
+
+		assert.True(t, one.Equals(two))
+		assert.False(t, one.Equals(three))
+		assert.False(t, two.Equals(three))
+	})
+}