diff --git a/tests/testGraph.cpp b/tests/testGraph.cpp
index 7a90cf1b2..ecd21b659 100644
--- a/tests/testGraph.cpp
+++ b/tests/testGraph.cpp
@@ -48,7 +48,7 @@ TEST ( Ordering, predecessorMap2Keys ) {
   expected += 4,5,3,2,1;
 
   list<Key> actual = predecessorMap2Keys<Key>(p_map);
-  LONGS_EQUAL(expected.size(), actual.size());
+  LONGS_EQUAL((long)expected.size(), (long)actual.size());
 
   list<Key>::const_iterator it1 = expected.begin();
   list<Key>::const_iterator it2 = actual.begin();
diff --git a/tests/testMarginals.cpp b/tests/testMarginals.cpp
index 91cca41e3..9e0e76ec7 100644
--- a/tests/testMarginals.cpp
+++ b/tests/testMarginals.cpp
@@ -229,12 +229,12 @@ TEST(Marginals, order) {
   FastVector<Key> keys(fg.keys());
   JointMarginal joint = marginals.jointMarginalCovariance(keys);
 
-  LONGS_EQUAL(3, joint(0,0).rows());
-  LONGS_EQUAL(3, joint(1,1).rows());
-  LONGS_EQUAL(3, joint(2,2).rows());
-  LONGS_EQUAL(3, joint(3,3).rows());
-  LONGS_EQUAL(2, joint(100,100).rows());
-  LONGS_EQUAL(2, joint(101,101).rows());
+  LONGS_EQUAL(3, (long)joint(0,0).rows());
+  LONGS_EQUAL(3, (long)joint(1,1).rows());
+  LONGS_EQUAL(3, (long)joint(2,2).rows());
+  LONGS_EQUAL(3, (long)joint(3,3).rows());
+  LONGS_EQUAL(2, (long)joint(100,100).rows());
+  LONGS_EQUAL(2, (long)joint(101,101).rows());
 }
 
 /* ************************************************************************* */