diff --git a/test/test_heuristics.rb b/test/test_heuristics.rb
index a81d81b3e3..ed28002104 100755
--- a/test/test_heuristics.rb
+++ b/test/test_heuristics.rb
@@ -723,6 +723,12 @@ def test_ms_by_heuristics
     })
   end
 
+  def test_msg_by_heuristics
+    assert_heuristics({
+      "omnetpp-msg" => all_fixtures("omnetpp-msg", "*.msg"),
+    })
+  end
+
   def test_n_by_heuristics
     assert_heuristics({
       "Roff" => all_fixtures("Roff", "*.n"),