diff --git a/commons/src/main/java/lcsb/mapviewer/common/UnitTestFailedWatcher.java b/commons/src/main/java/lcsb/mapviewer/common/UnitTestFailedWatcher.java
index cf8337839412ceb899d0adb94ed415855aaa1b53..833ee1a0c8d7b6a585345a8d66edfc4da0d14dff 100644
--- a/commons/src/main/java/lcsb/mapviewer/common/UnitTestFailedWatcher.java
+++ b/commons/src/main/java/lcsb/mapviewer/common/UnitTestFailedWatcher.java
@@ -6,6 +6,8 @@ import org.junit.runner.Description;
 public class UnitTestFailedWatcher extends TestWatcher {
   @Override
   protected void failed(Throwable e, Description description) {
-    e.printStackTrace();
+    if (!(e instanceof AssertionError)) {
+      e.printStackTrace();
+    }
   }
 }