diff --git a/fs_test.go b/fs_test.go
index 167ac1af..48cfd6f0 100644
--- a/fs_test.go
+++ b/fs_test.go
@@ -48,6 +48,36 @@ func TestOnlyFilesFS_Open_err(t *testing.T) {
 	assert.Nil(t, file)
 }
 
+func TestOnlyHTMLFS_Open(t *testing.T) {
+	var testFile *os.File
+	mockFS := &mockFileSystem{
+		open: func(name string) (http.File, error) {
+			return testFile, nil
+		},
+	}
+	fs := &OnlyHTMLFS{FileSystem: mockFS}
+
+	file, err := fs.Open("foo")
+
+	require.NoError(t, err)
+	assert.Equal(t, testFile, file)
+}
+
+func TestOnlyHTMLFS_Open_err(t *testing.T) {
+	testError := errors.New("mock")
+	mockFS := &mockFileSystem{
+		open: func(_ string) (http.File, error) {
+			return nil, testError
+		},
+	}
+	fs := &OnlyHTMLFS{FileSystem: mockFS}
+
+	file, err := fs.Open("foo")
+
+	require.ErrorIs(t, err, testError)
+	assert.Nil(t, file)
+}
+
 func Test_neuteredReaddirFile_Readdir(t *testing.T) {
 	n := neutralizedReaddirFile{}
 
diff --git a/gin_test.go b/gin_test.go
index ce75cab1..56115547 100644
--- a/gin_test.go
+++ b/gin_test.go
@@ -326,8 +326,8 @@ func TestLoadHTMLFilesFuncMap(t *testing.T) {
 	assert.Equal(t, "Date: 2017/07/01", string(resp))
 }
 
-//go:embed testdata/template/*
-var htmlFS embed.FS
+//go:embed testdata/template/*.tmpl
+var tmplFS embed.FS
 
 func TestLoadHTMLFSTestMode(t *testing.T) {
 	ts := setupHTMLFiles(
@@ -335,7 +335,7 @@ func TestLoadHTMLFSTestMode(t *testing.T) {
 		TestMode,
 		false,
 		func(router *Engine) {
-			router.LoadHTMLFS(http.FS(htmlFS), "testdata/template/hello.tmpl", "testdata/template/raw.tmpl")
+			router.LoadHTMLFS(http.FS(tmplFS), "testdata/template/hello.tmpl", "testdata/template/raw.tmpl")
 		},
 	)
 	defer ts.Close()
@@ -355,7 +355,7 @@ func TestLoadHTMLFSDebugMode(t *testing.T) {
 		DebugMode,
 		false,
 		func(router *Engine) {
-			router.LoadHTMLFS(http.FS(htmlFS), "testdata/template/hello.tmpl", "testdata/template/raw.tmpl")
+			router.LoadHTMLFS(http.FS(tmplFS), "testdata/template/hello.tmpl", "testdata/template/raw.tmpl")
 		},
 	)
 	defer ts.Close()
@@ -375,7 +375,7 @@ func TestLoadHTMLFSReleaseMode(t *testing.T) {
 		ReleaseMode,
 		false,
 		func(router *Engine) {
-			router.LoadHTMLFS(http.FS(htmlFS), "testdata/template/hello.tmpl", "testdata/template/raw.tmpl")
+			router.LoadHTMLFS(http.FS(tmplFS), "testdata/template/hello.tmpl", "testdata/template/raw.tmpl")
 		},
 	)
 	defer ts.Close()
@@ -395,7 +395,7 @@ func TestLoadHTMLFSUsingTLS(t *testing.T) {
 		TestMode,
 		true,
 		func(router *Engine) {
-			router.LoadHTMLFS(http.FS(htmlFS), "testdata/template/hello.tmpl", "testdata/template/raw.tmpl")
+			router.LoadHTMLFS(http.FS(tmplFS), "testdata/template/hello.tmpl", "testdata/template/raw.tmpl")
 		},
 	)
 	defer ts.Close()
@@ -422,7 +422,7 @@ func TestLoadHTMLFSFuncMap(t *testing.T) {
 		TestMode,
 		false,
 		func(router *Engine) {
-			router.LoadHTMLFS(http.FS(htmlFS), "testdata/template/hello.tmpl", "testdata/template/raw.tmpl")
+			router.LoadHTMLFS(http.FS(tmplFS), "testdata/template/hello.tmpl", "testdata/template/raw.tmpl")
 		},
 	)
 	defer ts.Close()