diff --git a/flatlaf-testing/src/main/java/com/formdev/flatlaf/testing/FlatTextComponentsTest.java b/flatlaf-testing/src/main/java/com/formdev/flatlaf/testing/FlatTextComponentsTest.java
index 67820c16..80b68989 100644
--- a/flatlaf-testing/src/main/java/com/formdev/flatlaf/testing/FlatTextComponentsTest.java
+++ b/flatlaf-testing/src/main/java/com/formdev/flatlaf/testing/FlatTextComponentsTest.java
@@ -76,8 +76,8 @@ public class FlatTextComponentsTest
 		JSpinner spinner1 = new JSpinner();
 		JSpinner spinner2 = new JSpinner();
 		JSpinner spinner3 = new JSpinner();
-		JComboBox comboBox2 = new JComboBox();
-		JComboBox comboBox4 = new JComboBox();
+		JComboBox<String> comboBox2 = new JComboBox<>();
+		JComboBox<String> comboBox4 = new JComboBox<>();
 		JPopupMenu popupMenu1 = new JPopupMenu();
 		JMenuItem cutMenuItem = new JMenuItem();
 		JMenuItem copyMenuItem = new JMenuItem();
diff --git a/flatlaf-testing/src/main/java/com/formdev/flatlaf/testing/FlatTextComponentsTest.jfd b/flatlaf-testing/src/main/java/com/formdev/flatlaf/testing/FlatTextComponentsTest.jfd
index 22bb01b8..aa4526b3 100644
--- a/flatlaf-testing/src/main/java/com/formdev/flatlaf/testing/FlatTextComponentsTest.jfd
+++ b/flatlaf-testing/src/main/java/com/formdev/flatlaf/testing/FlatTextComponentsTest.jfd
@@ -246,12 +246,18 @@ new FormModel {
 			add( new FormComponent( "javax.swing.JComboBox" ) {
 				name: "comboBox2"
 				"editable": true
+				auxiliary() {
+					"JavaCodeGenerator.typeParameters": "String"
+				}
 			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 				"value": "cell 1 10,growx,height 40"
 			} )
 			add( new FormComponent( "javax.swing.JComboBox" ) {
 				name: "comboBox4"
 				"editable": true
+				auxiliary() {
+					"JavaCodeGenerator.typeParameters": "String"
+				}
 			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 				"value": "cell 1 11,growx,hmax 14"
 			} )