diff --git a/e-invoicing-domain/build.gradle.kts b/e-invoicing-domain/build.gradle.kts
index 02b0a1f..c230ed3 100644
--- a/e-invoicing-domain/build.gradle.kts
+++ b/e-invoicing-domain/build.gradle.kts
@@ -14,6 +14,7 @@ val klfVersion: String by project
 
 val assertKVersion: String by project
 val xunitVersion: String by project
+val logbackVersion: String by project
 
 dependencies {
     implementation("org.mustangproject:library:$mustangVersion")
@@ -23,8 +24,10 @@ dependencies {
 
     testImplementation(kotlin("test"))
 
-    implementation("com.willowtreeapps.assertk:assertk:$assertKVersion")
+    testImplementation("com.willowtreeapps.assertk:assertk:$assertKVersion")
     testImplementation("org.xmlunit:xmlunit-core:$xunitVersion")
+
+    testImplementation("ch.qos.logback:logback-classic:$logbackVersion")
 }
 
 
diff --git a/e-invoicing-domain/src/test/resources/logback-test.xml b/e-invoicing-domain/src/test/resources/logback-test.xml
new file mode 100644
index 0000000..9bd861f
--- /dev/null
+++ b/e-invoicing-domain/src/test/resources/logback-test.xml
@@ -0,0 +1,24 @@
+<configuration>
+
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <!-- encoders are assigned the type
+             ch.qos.logback.classic.encoder.PatternLayoutEncoder by default -->
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
+        </encoder>
+
+        <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
+            <level>DEBUG</level>
+        </filter>
+    </appender>
+
+    <!-- Insert the current time formatted as "yyyyMMdd'T'HHmmss" under
+         the key "bySecond" into the logger context. This value will be
+         available to all subsequent configuration elements. -->
+    <timestamp key="bySecond" datePattern="yyyyMMdd'T'HHmmss"/>
+
+    <root level="ALL">
+        <appender-ref ref="STDOUT"/>
+    </root>
+
+</configuration>
\ No newline at end of file
diff --git a/gradle.properties b/gradle.properties
index 10e8f72..e5e81b3 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -8,6 +8,8 @@ kotlinVersion=1.9.25
 mustangVersion=2.14.2
 
 klfVersion=1.6.2
+# only used for tests
+logbackVersion=1.5.12
 
 assertKVersion=0.28.1
 xunitVersion=2.10.0
\ No newline at end of file