diff --git a/test/algorithms/set_operations/difference/difference_multi.cpp b/test/algorithms/set_operations/difference/difference_multi.cpp
index 0cc52faa8..313c8bb14 100644
--- a/test/algorithms/set_operations/difference/difference_multi.cpp
+++ b/test/algorithms/set_operations/difference/difference_multi.cpp
@@ -433,6 +433,8 @@ void test_areal()
     TEST_DIFFERENCE(case_recursive_boxes_80, 1, 0.5, 2, 0.75, 3);
 #endif
 
+    TEST_DIFFERENCE(case_recursive_boxes_81, 3, 5.0, 6, 6.75, 6);
+
     {
         ut_settings sym_settings;
     #if defined(BOOST_GEOMETRY_NO_ROBUSTNESS)
diff --git a/test/algorithms/set_operations/union/union_multi.cpp b/test/algorithms/set_operations/union/union_multi.cpp
index eb98884df..c43e7489f 100644
--- a/test/algorithms/set_operations/union/union_multi.cpp
+++ b/test/algorithms/set_operations/union/union_multi.cpp
@@ -414,6 +414,8 @@ void test_areal()
     TEST_UNION(case_recursive_boxes_80, 2, 1, -1, 1.5);
 #endif
 
+    TEST_UNION(case_recursive_boxes_81, 5, 0, -1, 15.5);
+
     test_one<Polygon, MultiPolygon, MultiPolygon>("ggl_list_20120915_h2_a",
          ggl_list_20120915_h2[0], ggl_list_20120915_h2[1],
          1, 0, 12, 23.0); // Area from SQL Server