diff --git a/tests/fr/inria/verveine/extractor/java/VerveineJTest_Basic.java b/tests/fr/inria/verveine/extractor/java/VerveineJTest_Basic.java
index 058f196e..706e887a 100644
--- a/tests/fr/inria/verveine/extractor/java/VerveineJTest_Basic.java
+++ b/tests/fr/inria/verveine/extractor/java/VerveineJTest_Basic.java
@@ -28,7 +28,7 @@
 
 public abstract class VerveineJTest_Basic {
 
-	protected static final String DEFAULT_OUTPUT_FILE = "output.mse";
+	protected static final String DEFAULT_OUTPUT_FILE = "output.json";
 
 	protected Repository repo;
 	protected VerveineJParser parser;
@@ -520,4 +520,4 @@ public Collection<Class<?>> directChildren() {
 		}
     }
 
-}
\ No newline at end of file
+}