diff --git a/.forgejo/workflows/run-test-asserts.yaml b/.forgejo/workflows/run-test-asserts.yaml
index fef07bb..609bb69 100644
--- a/.forgejo/workflows/run-test-asserts.yaml
+++ b/.forgejo/workflows/run-test-asserts.yaml
@@ -14,4 +14,4 @@ jobs:
       - name: Check out
         uses: actions/checkout@v3
       - name: Run asserts
-        run: mvn clean test -Djava.awt.headless=true
+        run: mvn clean test
diff --git a/nx01-x4o-driver/src/test/java/org/x4o/xml/io/X4OWriterTest.java b/nx01-x4o-driver/src/test/java/org/x4o/xml/io/X4OWriterTest.java
index 515dde6..7583c53 100644
--- a/nx01-x4o-driver/src/test/java/org/x4o/xml/io/X4OWriterTest.java
+++ b/nx01-x4o-driver/src/test/java/org/x4o/xml/io/X4OWriterTest.java
@@ -33,6 +33,7 @@ import java.io.OutputStream;
 import java.nio.charset.Charset;
 
 import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 import org.x4o.xml.X4ODriver;
 import org.x4o.xml.test.TestDriver;
@@ -74,6 +75,7 @@ public class X4OWriterTest {
 	}
 
 	@Test
+	@Disabled("Caused by: java.awt.HeadlessException")
 	public void testWriterSwiXmlOutput() throws Exception {
 		Accelerator3 ac3 = new Accelerator3(false);
 		SwingEngine engine = new SwingEngine(ac3);
diff --git a/nx01-x4o-driver/src/test/java/org/x4o/xml/test/swixml/Accelerator3Test.java b/nx01-x4o-driver/src/test/java/org/x4o/xml/test/swixml/Accelerator3Test.java
index 5283c9a..dfe50b4 100644
--- a/nx01-x4o-driver/src/test/java/org/x4o/xml/test/swixml/Accelerator3Test.java
+++ b/nx01-x4o-driver/src/test/java/org/x4o/xml/test/swixml/Accelerator3Test.java
@@ -29,6 +29,7 @@ import javax.swing.JMenu;
 import javax.swing.JMenuItem;
 
 import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 import org.x4o.xml.io.X4OReader;
 
@@ -41,6 +42,7 @@ import org.x4o.xml.io.X4OReader;
 public class Accelerator3Test {
 
 	@Test
+	@Disabled("Caused by: java.awt.HeadlessException")
 	public void testSwingMenuAbout() throws Exception {
 		Accelerator3 ac3 = new Accelerator3(false);
 		SwingEngine engine = new SwingEngine(ac3);
diff --git a/pom.xml b/pom.xml
index c2298f1..2a0d573 100644
--- a/pom.xml
+++ b/pom.xml
@@ -527,6 +527,11 @@
 					<artifactId>maven-gpg-plugin</artifactId>
 					<version>3.2.4</version>
 				</plugin>
+				<plugin>
+					<groupId>org.apache.maven.plugins</groupId>
+					<artifactId>maven-surefire-plugin</artifactId>
+					<version>3.5.4</version>
+				</plugin>
 				<plugin>
 					<groupId>org.codehaus.mojo</groupId>
 					<artifactId>build-helper-maven-plugin</artifactId>
@@ -535,6 +540,15 @@
 			</plugins>
 		</pluginManagement>
 		<plugins>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-surefire-plugin</artifactId>
+				<configuration>
+					<systemPropertyVariables>
+						<java.awt.headless>true</java.awt.headless>
+					</systemPropertyVariables>
+				</configuration>
+			</plugin>
 		</plugins>
 	</build>
 	<profiles>