diff --git a/src/db/unit_tests/dbHierNetworkProcessorTests.cc b/src/db/unit_tests/dbHierNetworkProcessorTests.cc
index 6f9743225..2f3fa3296 100644
--- a/src/db/unit_tests/dbHierNetworkProcessorTests.cc
+++ b/src/db/unit_tests/dbHierNetworkProcessorTests.cc
@@ -1281,3 +1281,9 @@ TEST(119_HierClustersCombArrays)
   run_hc_test (_this, "comb.gds", "comb_au1.gds");
   run_hc_test_with_backannotation (_this, "comb.gds", "comb_au2.gds");
 }
+
+TEST(120_HierClustersCombArrays)
+{
+  run_hc_test (_this, "comb2.gds", "comb2_au1.gds");
+  run_hc_test_with_backannotation (_this, "comb2.gds", "comb2_au2.gds");
+}
diff --git a/testdata/algo/comb.gds b/testdata/algo/comb.gds
new file mode 100644
index 000000000..b7c25e67a
Binary files /dev/null and b/testdata/algo/comb.gds differ
diff --git a/testdata/algo/comb2.gds b/testdata/algo/comb2.gds
new file mode 100644
index 000000000..8982b74f2
Binary files /dev/null and b/testdata/algo/comb2.gds differ
diff --git a/testdata/algo/comb2_au1.gds b/testdata/algo/comb2_au1.gds
new file mode 100644
index 000000000..14e796643
Binary files /dev/null and b/testdata/algo/comb2_au1.gds differ
diff --git a/testdata/algo/comb2_au2.gds b/testdata/algo/comb2_au2.gds
new file mode 100644
index 000000000..eefdc531a
Binary files /dev/null and b/testdata/algo/comb2_au2.gds differ
diff --git a/testdata/algo/comb_au1.gds b/testdata/algo/comb_au1.gds
new file mode 100644
index 000000000..d12552b3a
Binary files /dev/null and b/testdata/algo/comb_au1.gds differ
diff --git a/testdata/algo/comb_au2.gds b/testdata/algo/comb_au2.gds
new file mode 100644
index 000000000..ee738ddf4
Binary files /dev/null and b/testdata/algo/comb_au2.gds differ