diff --git a/test/auth.go b/test/auth.go
new file mode 100644
index 0000000..8ce94d2
--- /dev/null
+++ b/test/auth.go
@@ -0,0 +1,11 @@
+package test
+
+import (
+	"github.com/gin-gonic/gin"
+	"github.com/gotify/server/model"
+)
+
+// WithUser fake an authentication for testing.
+func WithUser(ctx *gin.Context, userID uint) {
+	ctx.Set("user", &model.User{ID: userID})
+}
diff --git a/test/auth_test.go b/test/auth_test.go
new file mode 100644
index 0000000..e217c81
--- /dev/null
+++ b/test/auth_test.go
@@ -0,0 +1,19 @@
+package test_test
+
+import (
+	"testing"
+
+	"github.com/gin-gonic/gin"
+	"github.com/gotify/server/auth"
+	"github.com/gotify/server/mode"
+	"github.com/gotify/server/test"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestFakeAuth(t *testing.T) {
+	mode.Set(mode.TestDev)
+
+	ctx, _ := gin.CreateTestContext(nil)
+	test.WithUser(ctx, 5)
+	assert.Equal(t, uint(5), auth.GetUserID(ctx))
+}