diff --git a/Tests/MP3DecoderTests.cpp b/Tests/MP3DecoderTests.cpp
index 7236517e08..7452d3bc19 100644
--- a/Tests/MP3DecoderTests.cpp
+++ b/Tests/MP3DecoderTests.cpp
@@ -30,6 +30,7 @@ class MP3DecoderTests: public ::testing::Test {
 
 
 static void runMp3TwoPieceTestWithBackend(int backend) {
+    fprintf(stderr, "backend: %d\n", backend);
     deadbeef->conf_set_int ("mp3.backend", backend);
 
     char path[PATH_MAX];