diff --git a/test/gzip/test_gzip.sh b/test/gzip/test_gzip.sh
index cfff7ecb9a50812233869fa0618ad796ad05c21d..1b671fedec273aa29090d9a1cdda8fd95adbc7fa 100755
--- a/test/gzip/test_gzip.sh
+++ b/test/gzip/test_gzip.sh
@@ -71,5 +71,5 @@ build_zafl gzip.zafl
 test_zafl ./gzip.zafl
 cleanup
 
-log_success "all tests passed"
+log_success "all tests passed: zafl instrumentation operational on gzip"