1 files changed, 2 insertions, 2 deletions
diff --git a/test/org/traccar/ProtocolDecoderTest.java b/test/org/traccar/ProtocolDecoderTest.java
index df8eb4e10..95f00e5d1 100644
--- a/test/org/traccar/ProtocolDecoderTest.java
+++ b/test/org/traccar/ProtocolDecoderTest.java
@@ -68,7 +68,7 @@ public class ProtocolDecoderTest {
     protected void verifyPositions(BaseProtocolDecoder decoder, Object object) throws Exception {
         Object decodedObject = decoder.decode(null, null, object);
         Assert.assertNotNull(decodedObject);
-        Assert.assertTrue(decodedObject instanceof List);
+        Assert.assertTrue("not a list", decodedObject instanceof List);
         Assert.assertFalse("list if empty", ((List) decodedObject).isEmpty());
         for (Object item : (List) decodedObject) {
             verifyDecodedPosition(item);
@@ -78,7 +78,7 @@ public class ProtocolDecoderTest {
     protected void verifyPositions(BaseProtocolDecoder decoder, Object object, Position position) throws Exception {
         Object decodedObject = decoder.decode(null, null, object);
         Assert.assertNotNull(decodedObject);
-        Assert.assertTrue(decodedObject instanceof List);
+        Assert.assertTrue("not a list", decodedObject instanceof List);
         Assert.assertFalse("list if empty", ((List) decodedObject).isEmpty());
         for (Object item : (List) decodedObject) {
             verifyDecodedPosition(item, position);