diff --git a/go/services/aged_brie_item_update_service_test.go b/go/services/aged_brie_item_update_service_test.go
new file mode 100644
index 00000000..758e241d
--- /dev/null
+++ b/go/services/aged_brie_item_update_service_test.go
@@ -0,0 +1,41 @@
+package services
+
+import (
+    "testing"
+    "github.com/stretchr/testify/assert"
+
+    "github.com/emilybache/gildedrose-refactoring-kata/models"
+)
+
+// Aged Brie quality increments in 1 after each day
+func TestAgedBrieItemUpdateService_QualityBeforeSellIn(t *testing.T) {
+    runTestCase(t, func(
+        agedBrieItemUpdateService AgedBrieItemUpdateService,
+    ) {
+        item := models.NewItem(&models.ItemModel{"Aged Brie", 5, 5})
+        agedBrieItemUpdateService.UpdateQuality(item)
+        assert.Equal(t, item.Model.Quality, 6)
+    })
+}
+
+// If the sellIn date has been passed, the Aged Brie quality increments in 2
+func TestAgedBrieItemUpdateService_QualityAfterSellIn0Days(t *testing.T) {
+    runTestCase(t, func(
+        agedBrieItemUpdateService AgedBrieItemUpdateService,
+    ) {
+        item := models.NewItem(&models.ItemModel{"Aged Brie", 0, 5})
+        agedBrieItemUpdateService.UpdateQuality(item)
+        assert.Equal(t, item.Model.Quality, 7)
+    })
+}
+
+// If the sellIn date has been passed, the Aged Brie quality increments in 2
+func TestAgedBrieItemUpdateService_QualityAfterSellIn4Days(t *testing.T) {
+    runTestCase(t, func(
+        agedBrieItemUpdateService AgedBrieItemUpdateService,
+    ) {
+        item := models.NewItem(&models.ItemModel{"Aged Brie", -4, 5})
+        agedBrieItemUpdateService.UpdateQuality(item)
+        assert.Equal(t, item.Model.Quality, 7)
+    })
+}
diff --git a/go/services/services_test.go b/go/services/services_test.go
new file mode 100644
index 00000000..64649f93
--- /dev/null
+++ b/go/services/services_test.go
@@ -0,0 +1,30 @@
+package services
+
+import (
+    "testing"
+
+    "github.com/stretchr/testify/require"
+
+    "go.uber.org/fx"
+    "go.uber.org/fx/fxtest"
+
+    "github.com/emilybache/gildedrose-refactoring-kata/lib"
+)
+
+var TestCommonModules = fx.Options(
+    Module,
+    lib.Module,
+)
+
+type TestCaseRunner interface{}
+
+func setupTestCase(logger lib.Logger) {
+    logger.Info("Setup Service test case")
+}
+
+func runTestCase(t *testing.T, runner TestCaseRunner) {
+    app := fxtest.New(t, TestCommonModules, fx.Invoke(setupTestCase), fx.Invoke(runner))
+
+    defer app.RequireStart().RequireStop()
+    require.NoError(t, app.Err())
+}