diff --git a/tests/test-run-tests.t b/tests/test-run-tests.t
--- a/tests/test-run-tests.t
+++ b/tests/test-run-tests.t
@@ -6,3 +6,15 @@ Smoke test
   $ $TESTDIR/run-tests.py
   
   # Ran 0 tests, 0 skipped, 0 warned, 0 failed.
+
+a succesful test
+=======================
+
+  $ cat > test-success.t << EOF
+  >   $ echo babar
+  >   babar
+  > EOF
+
+  $ $TESTDIR/run-tests.py --with-hg=`which hg`
+  .
+  # Ran 1 tests, 0 skipped, 0 warned, 0 failed.