diff --git a/app/views/community_solutions/_form.html.slim b/app/views/community_solutions/_form.html.slim
index 3ea63067..480bf004 100644
--- a/app/views/community_solutions/_form.html.slim
+++ b/app/views/community_solutions/_form.html.slim
@@ -35,7 +35,7 @@
           .card-header.d-flex.justify-content-between.align-items-center.px-0.py-2
             .px-2 = I18n.t('exercises.editor_file_tree.file_root')
           .card-body.pt-0.pe-0.ps-1.pb-1
-            #files data-entries=FileTree.new(@files).to_js_tree
+            #files data-entries=FileTree.new(@files).to_js_tree_in_json
       div class=(@community_solution.exercise.hide_file_tree ? 'col-sm-12' : 'col-sm-9')
         div.editor-col.col.p-0 id='frames'
           - @files.each do |file|
@@ -52,7 +52,7 @@
             .card-header.d-flex.justify-content-between.align-items-center.px-0.py-2
               .px-2 = I18n.t('exercises.editor_file_tree.file_root')
             .card-body.pt-0.pe-0.ps-1.pb-1
-              #own-files data-entries=FileTree.new(@own_files).to_js_tree
+              #own-files data-entries=FileTree.new(@own_files).to_js_tree_in_json
         div class=(@community_solution.exercise.hide_file_tree ? 'col-sm-12' : 'col-sm-9')
           div.editor-col.col.p-0 id='own-frames'
             - @own_files.each do |file|
diff --git a/app/views/exercises/_editor_file_tree.html.slim b/app/views/exercises/_editor_file_tree.html.slim
index 1299b51e..9e3a78bd 100644
--- a/app/views/exercises/_editor_file_tree.html.slim
+++ b/app/views/exercises/_editor_file_tree.html.slim
@@ -25,7 +25,7 @@ div.d-grid.enforce-bottom-margin id='sidebar-uncollapsed' class=(@exercise.hide_
 
           .card-body.pt-0.pe-0.ps-1.pb-1
 
-            #files data-entries=FileTree.new(files).to_js_tree
+            #files data-entries=FileTree.new(files).to_js_tree_in_json
 
         hr
 
diff --git a/app/views/exercises/external_users/statistics.html.slim b/app/views/exercises/external_users/statistics.html.slim
index 4b34fc89..3fedb649 100644
--- a/app/views/exercises/external_users/statistics.html.slim
+++ b/app/views/exercises/external_users/statistics.html.slim
@@ -22,7 +22,7 @@ h1
   #stats-editor.row
     - index = 0
     - all_files.each do |files|
-      .files class=(@exercise.hide_file_tree ? 'd-none col-sm-3' : 'col-sm-3') data-index=index data-entries=FileTree.new(files).to_js_tree
+      .files class=(@exercise.hide_file_tree ? 'd-none col-sm-3' : 'col-sm-3') data-index=index data-entries=FileTree.new(files).to_js_tree_in_json
       - index += 1
     div class=(@exercise.hide_file_tree ? 'col-sm-12' : 'col-sm-9')
       #current-file.editor
diff --git a/lib/file_tree.rb b/lib/file_tree.rb
index dd0d8fa1..295852ca 100644
--- a/lib/file_tree.rb
+++ b/lib/file_tree.rb
@@ -77,6 +77,10 @@ class FileTree
       core: {
         data: @root.children.map {|child| map_to_js_tree(child) },
       },
-    }.to_json
+    }
+  end
+
+  def to_js_tree_in_json
+    to_js_tree.to_json
   end
 end
diff --git a/spec/lib/file_tree_spec.rb b/spec/lib/file_tree_spec.rb
index 2bb1da69..d716deee 100644
--- a/spec/lib/file_tree_spec.rb
+++ b/spec/lib/file_tree_spec.rb
@@ -180,8 +180,8 @@ describe FileTree do
     end
   end
 
-  describe '#to_js_tree' do
-    let(:js_tree) { file_tree.to_js_tree }
+  describe '#to_js_tree_in_json' do
+    let(:js_tree) { file_tree.to_js_tree_in_json }
 
     it 'returns a String' do
       expect(js_tree).to be_a(String)
@@ -196,7 +196,7 @@ describe FileTree do
     context 'with files' do
       let(:files) { build_list(:file, 10, context: nil, path: 'foo/bar/baz') }
       let(:file_tree) { described_class.new(files) }
-      let(:js_tree) { file_tree.to_js_tree }
+      let(:js_tree) { file_tree.to_js_tree_in_json }
 
       it 'produces the required JSON format with a file' do
         # We ignore the root node and only use the children here