diff --git a/bramble-api/src/test/java/org/briarproject/bramble/test/BrambleTestCase.java b/bramble-api/src/test/java/org/briarproject/bramble/test/BrambleTestCase.java
index dd578c67c..9ac8a7a40 100644
--- a/bramble-api/src/test/java/org/briarproject/bramble/test/BrambleTestCase.java
+++ b/bramble-api/src/test/java/org/briarproject/bramble/test/BrambleTestCase.java
@@ -36,6 +36,7 @@ public abstract class BrambleTestCase {
 	@After
 	public void afterBrambleTestCase() {
 		Throwable thrown = exceptionInBackgroundThread;
+		LOG.warning("background thread has thrown an exception unexpectedly");
 		if (thrown != null) throw new AssertionError(thrown);
 	}
 }