diff --git a/gtsam_unstable/linear/tests/testLinearConstraint.cpp b/gtsam_unstable/linear/tests/testLinearConstraint.cpp
index 489af1db3..7aaec5720 100644
--- a/gtsam_unstable/linear/tests/testLinearConstraint.cpp
+++ b/gtsam_unstable/linear/tests/testLinearConstraint.cpp
@@ -23,13 +23,13 @@
 
 #include <boost/assign/std/vector.hpp>
 #include <boost/assign/list_of.hpp>
-//#include <boost/range/iterator_range.hpp>
-//#include <boost/range/adaptor/map.hpp>
 
 using namespace std;
 using namespace gtsam;
 using namespace boost::assign;
 
+GTSAM_CONCEPT_TESTABLE_INST(LinearConstraint)
+
 namespace {
   namespace simple {
     // Terms we'll use