diff --git a/src/drc/unit_tests/drcSimpleTests.cc b/src/drc/unit_tests/drcSimpleTests.cc
index dd3d15e4a..2547f4e9b 100644
--- a/src/drc/unit_tests/drcSimpleTests.cc
+++ b/src/drc/unit_tests/drcSimpleTests.cc
@@ -876,3 +876,43 @@ TEST(19_shielding)
   db::compare_layouts (_this, layout, au, db::NoNormalization);
 }
 
+TEST(20_interact_with_count)
+{
+  std::string rs = tl::testsrc ();
+  rs += "/testdata/drc/drcSimpleTests_20.drc";
+
+  std::string input = tl::testsrc ();
+  input += "/testdata/drc/drcSimpleTests_20.gds";
+
+  std::string au = tl::testsrc ();
+  au += "/testdata/drc/drcSimpleTests_au20.gds";
+
+  std::string output = this->tmp_file ("tmp.gds");
+
+  {
+    //  Set some variables
+    lym::Macro config;
+    config.set_text (tl::sprintf (
+        "$drc_test_source = '%s'\n"
+        "$drc_test_target = '%s'\n"
+      , input, output)
+    );
+    config.set_interpreter (lym::Macro::Ruby);
+    EXPECT_EQ (config.run (), 0);
+  }
+
+  lym::Macro drc;
+  drc.load_from (rs);
+  EXPECT_EQ (drc.run (), 0);
+
+  db::Layout layout;
+
+  {
+    tl::InputStream stream (output);
+    db::Reader reader (stream);
+    reader.read (layout);
+  }
+
+  db::compare_layouts (_this, layout, au, db::NoNormalization);
+}
+
diff --git a/testdata/drc/drcSimpleTests_20.drc b/testdata/drc/drcSimpleTests_20.drc
new file mode 100644
index 000000000..9bd481a5e
--- /dev/null
+++ b/testdata/drc/drcSimpleTests_20.drc
@@ -0,0 +1,56 @@
+
+# Hierarchical antenna check
+
+source($drc_test_source, "TOP")
+target($drc_test_target)
+
+l1 = input(1, 0)
+l2 = input(2, 0)
+
+l1.output(1, 0)
+l2.output(2, 0)
+
+l1.interacting(l2, 1).output(100, 0)
+l1.interacting(l2, 2).output(101, 0)
+l1.interacting(l2, 1..2).output(102, 0)
+l1.interacting(l2, 2..).output(103, 0)
+l1.interacting(l2, 1, 2).output(104, 0)
+
+l = l1.dup
+l.select_interacting(l2, 1)
+l.output(200, 0)
+l = l1.dup
+l.select_interacting(l2, 2)
+l.output(201, 0)
+l = l1.dup
+l.select_interacting(l2, 1..2)
+l.output(202, 0)
+l = l1.dup
+l.select_interacting(l2, 2..)
+l.output(203, 0)
+l = l1.dup
+l.select_interacting(l2, 1, 2)
+l.output(204, 0)
+
+l1.not_interacting(l2, 1).output(300, 0)
+l1.not_interacting(l2, 2).output(301, 0)
+l1.not_interacting(l2, 1..2).output(302, 0)
+l1.not_interacting(l2, 2..).output(303, 0)
+l1.not_interacting(l2, 1, 2).output(304, 0)
+
+l = l1.dup
+l.select_not_interacting(l2, 1)
+l.output(400, 0)
+l = l1.dup
+l.select_not_interacting(l2, 2)
+l.output(401, 0)
+l = l1.dup
+l.select_not_interacting(l2, 1..2)
+l.output(402, 0)
+l = l1.dup
+l.select_not_interacting(l2, 2..)
+l.output(403, 0)
+l = l1.dup
+l.select_not_interacting(l2, 1, 2)
+l.output(404, 0)
+
diff --git a/testdata/drc/drcSimpleTests_20.gds b/testdata/drc/drcSimpleTests_20.gds
new file mode 100644
index 000000000..08618beb2
Binary files /dev/null and b/testdata/drc/drcSimpleTests_20.gds differ
diff --git a/testdata/drc/drcSimpleTests_au20.gds b/testdata/drc/drcSimpleTests_au20.gds
new file mode 100644
index 000000000..77c6d5bfc
Binary files /dev/null and b/testdata/drc/drcSimpleTests_au20.gds differ