diff --git a/src/main/java/org/jabref/gui/groups/GroupTree.css b/src/main/java/org/jabref/gui/groups/GroupTree.css
index 929d77c55e4..cfd75e2de0a 100644
--- a/src/main/java/org/jabref/gui/groups/GroupTree.css
+++ b/src/main/java/org/jabref/gui/groups/GroupTree.css
@@ -29,7 +29,7 @@
     -fx-fill: -jr-group-hits-fg;
 }
 
-.disclosureNodeColumn {
+.expansionNodeColumn {
     -fx-alignment: top-right;
 }
 
@@ -73,7 +73,7 @@
     -fx-padding: 0.40em 0.2em 0.40em 0em;
 }
 
-.tree-table-row-cell:root > .disclosureNodeColumn {
+.tree-table-row-cell:root > .expansionNodeColumn {
     -fx-padding: 0.45em 0.2em 0.45em 0.2em;
 }
 
diff --git a/src/main/java/org/jabref/gui/groups/GroupTree.fxml b/src/main/java/org/jabref/gui/groups/GroupTree.fxml
index 662090bf0b7..8990ffada01 100644
--- a/src/main/java/org/jabref/gui/groups/GroupTree.fxml
+++ b/src/main/java/org/jabref/gui/groups/GroupTree.fxml
@@ -14,7 +14,8 @@
     <top>
         <HBox fx:id="groupFilterBar" alignment="CENTER" spacing="8">
             <CustomTextField fx:id="searchField" promptText="%Filter groups" HBox.hgrow="ALWAYS"/>
-            <Button fx:id="newGroupButton" onAction="#addNewGroup" styleClass="icon-button" ButtonBar.buttonData="RIGHT">
+            <Button fx:id="newGroupButton" onAction="#addNewGroup" styleClass="icon-button"
+                    ButtonBar.buttonData="RIGHT">
                 <graphic>
                     <JabRefIconView glyph="NEW_GROUP" glyphSize="18"/>
                 </graphic>
@@ -30,8 +31,8 @@
                 <TreeTableColumn fx:id="mainColumn"/>
                 <TreeTableColumn fx:id="numberColumn" minWidth="50.0" maxWidth="70.0" prefWidth="60.0"
                                  styleClass="numberColumn"/>
-                <TreeTableColumn fx:id="disclosureNodeColumn" maxWidth="14.0" minWidth="14.0"
-                                 styleClass="disclosureNodeColumn" text="Column X"/>
+                <TreeTableColumn fx:id="expansionNodeColumn" maxWidth="25.0" minWidth="25.0"
+                                 styleClass="expansionNodeColumn"/>
             </columns>
             <columnResizePolicy>
                 <TreeTableView fx:constant="CONSTRAINED_RESIZE_POLICY"/>
diff --git a/src/main/java/org/jabref/gui/groups/GroupTreeView.java b/src/main/java/org/jabref/gui/groups/GroupTreeView.java
index 58bb942cf34..c26db16fc85 100644
--- a/src/main/java/org/jabref/gui/groups/GroupTreeView.java
+++ b/src/main/java/org/jabref/gui/groups/GroupTreeView.java
@@ -61,7 +61,7 @@ public class GroupTreeView {
     @FXML private TreeTableView<GroupNodeViewModel> groupTree;
     @FXML private TreeTableColumn<GroupNodeViewModel, GroupNodeViewModel> mainColumn;
     @FXML private TreeTableColumn<GroupNodeViewModel, GroupNodeViewModel> numberColumn;
-    @FXML private TreeTableColumn<GroupNodeViewModel, GroupNodeViewModel> disclosureNodeColumn;
+    @FXML private TreeTableColumn<GroupNodeViewModel, GroupNodeViewModel> expansionNodeColumn;
     @FXML private CustomTextField searchField;
 
     @Inject private StateManager stateManager;
@@ -158,7 +158,7 @@ public void initialize() {
                     group.toggleExpansion();
                     event.consume();
                 })
-                .install(disclosureNodeColumn);
+                .install(expansionNodeColumn);
 
         // Set pseudo-classes to indicate if row is root or sub-item ( > 1 deep)
         PseudoClass rootPseudoClass = PseudoClass.getPseudoClass("root");