diff --git a/src/rba/unit_tests/rbaTests.cc b/src/rba/unit_tests/rbaTests.cc
index ccc664b73..5a1cfa730 100644
--- a/src/rba/unit_tests/rbaTests.cc
+++ b/src/rba/unit_tests/rbaTests.cc
@@ -149,6 +149,7 @@ RUBYTEST (extNetTracer, "extNetTracer.rb")
 RUBYTEST (imgObject, "imgObject.rb")
 RUBYTEST (layLayers, "layLayers.rb")
 RUBYTEST (layLayoutView, "layLayoutView.rb")
+RUBYTEST (layNetlistBrowser, "layNetlistBrowser.rb")
 RUBYTEST (layMainWindow, "layMainWindow.rb")
 RUBYTEST (layMarkers, "layMarkers.rb")
 RUBYTEST (layMacro, "layMacro.rb")
diff --git a/testdata/ruby/layNetlistBrowser.rb b/testdata/ruby/layNetlistBrowser.rb
new file mode 100644
index 000000000..95deddcff
--- /dev/null
+++ b/testdata/ruby/layNetlistBrowser.rb
@@ -0,0 +1,118 @@
+# encoding: UTF-8
+
+# KLayout Layout Viewer
+# Copyright (C) 2006-2026 Matthias Koefferlein
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+if !$:.member?(File::dirname($0))
+  $:.push(File::dirname($0))
+end
+
+load("test_prologue.rb")
+
+class LAYNetlistBrowser_TestClass < TestBase
+
+  # Basic view creation and MainWindow events
+  def test_1
+
+    if !RBA.constants.member?(:Application)
+      return
+    end
+
+    app = RBA::Application.instance
+    mw = app.main_window
+    mw.close_all
+
+    cv = mw.load_layout(ENV["TESTSRC"] + "/testdata/lvs/ringo_mixed_hierarchy.gds", 0)
+    lv = cv.view
+
+    nb = lv.netlist_browser
+
+    db = lv.lvsdb(lv.create_lvsdb("DB1"))
+    db.read(ENV["TESTSRC"] + "/testdata/lvs/ringo_mixed_hierarchy.lvsdb")
+
+    lv.show_lvsdb(0, 0)
+
+    # Test path selections
+
+    nl = nb.db.netlist
+
+    # net
+    n = nl.circuit_by_name("INVX1").net_by_name("OUT")
+    pth = RBA::NetlistObjectsPath.from_first(n)
+    nb.current_path = pth
+    assert_equal(nb.current_path.first.net.to_s, "INVX1:OUT")
+    assert_equal(nb.current_path.second.net.to_s, "INVX1:OUT")
+  
+    # device
+    n = nl.circuit_by_name("INVX1").device_by_id(1)
+    pth = RBA::NetlistObjectsPath.from_first(n)
+    nb.current_path = pth
+    assert_equal(nb.current_path.first.device.expanded_name, "$1")
+    assert_equal(nb.current_path.second.device.expanded_name, "$1")
+
+    # subcircuit
+    n = nl.circuit_by_name("RINGO").subcircuit_by_id(2)
+    pth = RBA::NetlistObjectsPath.from_first(n)
+    nb.current_path = pth
+    assert_equal(nb.current_path.first.path[-1].expanded_name, "$2")
+    assert_equal(nb.current_path.second.path[-1].expanded_name, "$11")
+
+    # circuit
+    n = nl.circuit_by_name("INVX1")
+    pth = RBA::NetlistObjectsPath.from_first(n)
+    nb.current_path = pth
+    assert_equal(nb.current_path.first.root.name, "INVX1")
+    assert_equal(nb.current_path.second.root.name, "INVX1")
+
+    nl = nb.db.reference
+
+    # net:
+    n = nl.circuit_by_name("INVX1").net_by_name("OUT")
+    pth = RBA::NetlistObjectsPath.from_second(n)
+    nb.current_path = pth
+    assert_equal(nb.current_path.first.net.to_s, "INVX1:OUT")
+    assert_equal(nb.current_path.second.net.to_s, "INVX1:OUT")
+    
+    # device
+    n = nl.circuit_by_name("INVX1").device_by_name("$2")
+    pth = RBA::NetlistObjectsPath.from_second(n)
+    nb.current_path = pth
+    assert_equal(nb.current_path.first.device.expanded_name, "$2")
+    assert_equal(nb.current_path.second.device.expanded_name, "$2")
+
+    # subcircuit
+    n = nl.circuit_by_name("RINGO").subcircuit_by_name("$3")
+    pth = RBA::NetlistObjectsPath.from_second(n)
+    nb.current_path = pth
+    assert_equal(nb.current_path.first.path[-1].expanded_name, "$4")
+    assert_equal(nb.current_path.second.path[-1].expanded_name, "$3")
+
+    # circuit
+    n = nl.circuit_by_name("INVX1")
+    pth = RBA::NetlistObjectsPath.from_second(n)
+    nb.current_path = pth
+    assert_equal(nb.current_path.first.root.name, "INVX1")
+    assert_equal(nb.current_path.second.root.name, "INVX1")
+
+    mw.close_all
+
+  end
+
+end
+
+load("test_epilogue.rb")
+