diff --git a/acme4j-client/pom.xml b/acme4j-client/pom.xml
index 90bc9a04..00ae0ac9 100644
--- a/acme4j-client/pom.xml
+++ b/acme4j-client/pom.xml
@@ -51,6 +51,12 @@
             <artifactId>slf4j-api</artifactId>
             <version>${slf4j.version}</version>
         </dependency>
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-simple</artifactId>
+            <version>${slf4j.version}</version>
+            <scope>test</scope>
+        </dependency>
         <dependency>
             <groupId>org.bouncycastle</groupId>
             <artifactId>bcpg-jdk15on</artifactId>
diff --git a/acme4j-client/src/test/resources/simplelogger.properties b/acme4j-client/src/test/resources/simplelogger.properties
new file mode 100644
index 00000000..9d089390
--- /dev/null
+++ b/acme4j-client/src/test/resources/simplelogger.properties
@@ -0,0 +1,2 @@
+
+org.slf4j.simpleLogger.log.org.shredzone.acme4j = debug