diff --git a/ImathTest/testBoxAlgo.cpp b/ImathTest/testBoxAlgo.cpp
index 9be1b7c..d61963c 100644
--- a/ImathTest/testBoxAlgo.cpp
+++ b/ImathTest/testBoxAlgo.cpp
@@ -886,10 +886,11 @@ boxMatrixTransform ()
 
     assert (approximatelyEqual (b2.min, b4.min, e));
     assert (approximatelyEqual (b2.max, b4.max, e));
-    assert (approximatelyEqual (b3.max, b4.max, e));
+    assert (approximatelyEqual (b3.min, b4.min, e));
     assert (approximatelyEqual (b3.max, b4.max, e));
 
-    assert (b21 == b2);
+    assert (approximatelyEqual (b2.min, b21.min, e));
+    assert (approximatelyEqual (b2.max, b21.max, e));
     assert (b31 == b3);
 
     M[0][3] = 1;