diff --git a/acme4j-example/src/main/java/org/shredzone/acme4j/ClientTest.java b/acme4j-example/src/main/java/org/shredzone/acme4j/ClientTest.java
index 7e25b612..07f0c2ee 100644
--- a/acme4j-example/src/main/java/org/shredzone/acme4j/ClientTest.java
+++ b/acme4j-example/src/main/java/org/shredzone/acme4j/ClientTest.java
@@ -52,7 +52,7 @@ public class ClientTest {
     private static final File USER_KEY_FILE = new File("user.key");
     private static final File DOMAIN_KEY_FILE = new File("domain.key");
     private static final File DOMAIN_CERT_FILE = new File("domain.crt");
-    private static final File DOMAIN_CSR_FILE = new File("domain.crt");
+    private static final File DOMAIN_CSR_FILE = new File("domain.csr");
 
     private static final int KEY_SIZE = 2048;