diff --git a/flatlaf-core/src/test/java/com/formdev/flatlaf/FlatTestFrame.java b/flatlaf-core/src/test/java/com/formdev/flatlaf/FlatTestFrame.java
index 7e28d60d..737bce66 100644
--- a/flatlaf-core/src/test/java/com/formdev/flatlaf/FlatTestFrame.java
+++ b/flatlaf-core/src/test/java/com/formdev/flatlaf/FlatTestFrame.java
@@ -248,7 +248,7 @@ public class FlatTestFrame
 
 				//---- explicitColorsCheckBox ----
 				explicitColorsCheckBox.setText("explicit colors");
-				explicitColorsCheckBox.setMnemonic('E');
+				explicitColorsCheckBox.setMnemonic('X');
 				explicitColorsCheckBox.addActionListener(e -> explicitColorsChanged());
 				buttonBar.add(explicitColorsCheckBox, "cell 1 0");
 
diff --git a/flatlaf-core/src/test/java/com/formdev/flatlaf/FlatTestFrame.jfd b/flatlaf-core/src/test/java/com/formdev/flatlaf/FlatTestFrame.jfd
index 668bd05d..352662b2 100644
--- a/flatlaf-core/src/test/java/com/formdev/flatlaf/FlatTestFrame.jfd
+++ b/flatlaf-core/src/test/java/com/formdev/flatlaf/FlatTestFrame.jfd
@@ -37,7 +37,7 @@ new FormModel {
 					add( new FormComponent( "javax.swing.JCheckBox" ) {
 						name: "explicitColorsCheckBox"
 						"text": "explicit colors"
-						"mnemonic": 69
+						"mnemonic": 88
 						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "explicitColorsChanged", false ) )
 					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 						"value": "cell 1 0"