diff --git a/internal/api/test.go b/internal/api/api_test.go
similarity index 61%
rename from internal/api/test.go
rename to internal/api/api_test.go
index c4ee8d340..ab1dd4b77 100644
--- a/internal/api/test.go
+++ b/internal/api/api_test.go
@@ -9,7 +9,8 @@ import (
 	"github.com/photoprism/photoprism/internal/test"
 )
 
-func NewTest() (app *gin.Engine, router *gin.RouterGroup, conf photoprism.Config) {
+// API test helper
+func NewApiTest() (app *gin.Engine, router *gin.RouterGroup, conf photoprism.Config) {
 	conf = test.NewConfig()
 	gin.SetMode(gin.TestMode)
 	app = gin.New()
@@ -19,7 +20,8 @@ func NewTest() (app *gin.Engine, router *gin.RouterGroup, conf photoprism.Config
 	return app, router, conf
 }
 
-func TestRequest(r http.Handler, method, path string) *httptest.ResponseRecorder {
+// See https://medium.com/@craigchilds94/testing-gin-json-responses-1f258ce3b0b1
+func PerformRequest(r http.Handler, method, path string) *httptest.ResponseRecorder {
 	req, _ := http.NewRequest(method, path, nil)
 	w := httptest.NewRecorder()
 	r.ServeHTTP(w, req)
diff --git a/internal/api/photos_test.go b/internal/api/photos_test.go
index e7fc76870..970431963 100644
--- a/internal/api/photos_test.go
+++ b/internal/api/photos_test.go
@@ -8,31 +8,31 @@ import (
 )
 
 func TestGetPhotos(t *testing.T) {
-	app, router, conf := NewTest()
+	app, router, conf := NewApiTest()
 
 	GetPhotos(router, conf)
 
-	result := TestRequest(app, "GET", "/api/v1/photos?count=10")
+	result := PerformRequest(app, "GET", "/api/v1/photos?count=10")
 
 	assert.Equal(t, http.StatusOK, result.Code)
 }
 
 func TestLikePhoto(t *testing.T) {
-	app, router, conf := NewTest()
+	app, router, conf := NewApiTest()
 
 	LikePhoto(router, conf)
 
-	result := TestRequest(app, "POST", "/api/v1/photos/1/like")
+	result := PerformRequest(app, "POST", "/api/v1/photos/1/like")
 
 	assert.Equal(t, http.StatusAccepted, result.Code)
 }
 
 func TestDislikePhoto(t *testing.T) {
-	app, router, conf := NewTest()
+	app, router, conf := NewApiTest()
 
 	DislikePhoto(router, conf)
 
-	result := TestRequest(app, "DELETE", "/api/v1/photos/1/like")
+	result := PerformRequest(app, "DELETE", "/api/v1/photos/1/like")
 
 	assert.Equal(t, http.StatusAccepted, result.Code)
 }
diff --git a/internal/frontend/config.go b/internal/frontend/config.go
index 4be7a2b37..72dd15647 100644
--- a/internal/frontend/config.go
+++ b/internal/frontend/config.go
@@ -1,4 +1,4 @@
 package frontend
 
-// Config values for Web frontend
+// HTTP client / Web UI config values
 type Config map[string]interface{}
diff --git a/internal/models/file.go b/internal/models/file.go
index abd3d6775..ba16881df 100644
--- a/internal/models/file.go
+++ b/internal/models/file.go
@@ -4,7 +4,7 @@ import (
 	"github.com/jinzhu/gorm"
 )
 
-// A file that belongs to a photo
+// An image or sidecar file that belongs to a photo
 type File struct {
 	gorm.Model
 	Photo              *Photo