diff --git a/picocli-codegen/src/main/java/picocli/codegen/annotation/processing/JulLogFormatter.java b/picocli-codegen/src/main/java/picocli/codegen/util/JulLogFormatter.java
similarity index 89%
rename from picocli-codegen/src/main/java/picocli/codegen/annotation/processing/JulLogFormatter.java
rename to picocli-codegen/src/main/java/picocli/codegen/util/JulLogFormatter.java
index a7aab64e..67913148 100644
--- a/picocli-codegen/src/main/java/picocli/codegen/annotation/processing/JulLogFormatter.java
+++ b/picocli-codegen/src/main/java/picocli/codegen/util/JulLogFormatter.java
@@ -1,11 +1,11 @@
-package picocli.codegen.annotation.processing;
+package picocli.codegen.util;
 
 import java.text.SimpleDateFormat;
 import java.util.Date;
 import java.util.logging.Formatter;
 import java.util.logging.LogRecord;
 
-class JulLogFormatter extends Formatter {
+public class JulLogFormatter extends Formatter {
     SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss.SSS");
 
     @Override
diff --git a/picocli-codegen/src/test/resources/logging.properties b/picocli-codegen/src/test/resources/logging.properties
new file mode 100644
index 00000000..67a8e7f7
--- /dev/null
+++ b/picocli-codegen/src/test/resources/logging.properties
@@ -0,0 +1,20 @@
+# activate with system property java.util.logging.config.file
+# Example:
+# java.util.logging.config.file=C:\Users\remko\IdeaProjects\picocli3\picocli-codegen\src\test\resources\logging.properties
+
+handlers= java.util.logging.FileHandler,java.util.logging.ConsoleHandler
+.level= ALL
+java.util.logging.ConsoleHandler.level = ALL
+java.util.logging.ConsoleHandler.formatter = java.util.logging.SimpleFormatter
+#java.util.logging.ConsoleHandler.formatter = picocli.codegen.util.JulLogFormatter
+picocli.annotation.processing.level = ALL
+
+java.util.logging.FileHandler.pattern = %h/picocli-codegen%u.log
+java.util.logging.FileHandler.limit = 50000
+java.util.logging.FileHandler.count = 1
+java.util.logging.FileHandler.formatter = java.util.logging.SimpleFormatter
+#java.util.logging.FileHandler.formatter = picocli.codegen.util.JulLogFormatter
+
+com.sun=WARN
+javax.management=WARN
+picocli.annotation.processing=FINEST