diff --git a/services/repository/files/tree.go b/services/repository/files/tree.go
index a402cb3360..720e0e2051 100644
--- a/services/repository/files/tree.go
+++ b/services/repository/files/tree.go
@@ -127,7 +127,7 @@ type TreeEntry struct {
 	Name     string       `json:"name"`
 	IsFile   bool         `json:"isFile"`
 	Path     string       `json:"path"`
-	Children []*TreeEntry `json:"children, omitempty"`
+	Children []*TreeEntry `json:"children,omitempty"`
 }
 
 /*
diff --git a/services/repository/files/tree_test.go b/services/repository/files/tree_test.go
index 83d6cae4d2..216dcdf4c9 100644
--- a/services/repository/files/tree_test.go
+++ b/services/repository/files/tree_test.go
@@ -138,7 +138,7 @@ func Test_GetTreeInformation(t *testing.T) {
 	assert.EqualValues(t, "doc", treeList[1].Name)
 	assert.EqualValues(t, "doc", treeList[1].Path)
 	assert.False(t, treeList[1].IsFile)
-	assert.Len(t, treeList[1].Children, 0)
+	assert.Empty(t, treeList[1].Children)
 
 	treeList, err = GetTreeInformation(ctx2, ctx2.Repo.Repository, "doc", refName)
 	assert.NoError(t, err)