diff --git a/src/main/org/apache/tools/ant/taskdefs/optional/junitlauncher/LegacyXmlResultFormatter.java b/src/main/org/apache/tools/ant/taskdefs/optional/junitlauncher/LegacyXmlResultFormatter.java
index 91caca6..cccff61 100644
--- a/src/main/org/apache/tools/ant/taskdefs/optional/junitlauncher/LegacyXmlResultFormatter.java
+++ b/src/main/org/apache/tools/ant/taskdefs/optional/junitlauncher/LegacyXmlResultFormatter.java
@@ -19,6 +19,7 @@
 
 import org.apache.tools.ant.util.DOMElementWriter;
 import org.apache.tools.ant.util.DateUtils;
+import org.apache.tools.ant.util.StringUtils;
 import org.junit.platform.engine.TestExecutionResult;
 import org.junit.platform.engine.TestSource;
 import org.junit.platform.engine.reporting.ReportEntry;
@@ -282,6 +283,7 @@
                     writer.writeAttribute(ATTR_MESSAGE, message);
                 }
                 writer.writeAttribute(ATTR_TYPE, t.getClass().getName());
+                writer.writeCharacters(StringUtils.getStackTrace(t));
             }
             writer.writeEndElement();
         }
@@ -299,6 +301,7 @@
                     writer.writeAttribute(ATTR_MESSAGE, message);
                 }
                 writer.writeAttribute(ATTR_TYPE, t.getClass().getName());
+                writer.writeCharacters(StringUtils.getStackTrace(t));
             }
             writer.writeEndElement();
         }