diff --git a/src/pya/unit_tests/pyaTests.cc b/src/pya/unit_tests/pyaTests.cc
index 7fb7d0366..7420d1f69 100644
--- a/src/pya/unit_tests/pyaTests.cc
+++ b/src/pya/unit_tests/pyaTests.cc
@@ -97,6 +97,7 @@ void run_pythontest (tl::TestBase *_this, const std::string &fn)
   TEST(n) { run_pythontest(_this, file); }
 
 PYTHONTEST (kwargs, "kwargs.py")
+PYTHONTEST (modTests, "modTests.py")
 PYTHONTEST (dbLayoutTest, "dbLayoutTest.py")
 PYTHONTEST (dbRegionTest, "dbRegionTest.py")
 PYTHONTEST (dbShapesTest, "dbShapesTest.py")
diff --git a/src/pymod/__init__.py.noqt b/src/pymod/__init__.py.noqt
index 4213afffb..e05d67916 100644
--- a/src/pymod/__init__.py.noqt
+++ b/src/pymod/__init__.py.noqt
@@ -1,5 +1,5 @@
-
 # klayout library definition file
 
+from .tl import __version__
 __all__ = [ "tl", "db", "lib", "lay", "rdb" ]
 
diff --git a/src/pymod/__init__.py.qt4 b/src/pymod/__init__.py.qt4
index 7ca1f3e1b..5a3a61b66 100644
--- a/src/pymod/__init__.py.qt4
+++ b/src/pymod/__init__.py.qt4
@@ -1,5 +1,5 @@
-
 # klayout library definition file
 
+from .tl import __version__
 __all__ = [ "tl", "db", "lib", "rdb", "QtCore", "QtGui", "QtXml", "QtSql", "QtNetwork", "QtDesigner", "QtUiTools", "lay" ]
 
diff --git a/src/pymod/__init__.py.qt5 b/src/pymod/__init__.py.qt5
index c6d2339fa..428c1acf0 100644
--- a/src/pymod/__init__.py.qt5
+++ b/src/pymod/__init__.py.qt5
@@ -1,6 +1,6 @@
-
 # klayout library definition file
 
+from .tl import __version__
 __all__ = [ "tl", "db", "lib", "rdb", 
             "QtCore", "QtGui", "QtNetwork", "QtSql", "QtWidgets", "QtDesigner", "QtUiTools",
             "QtMultimedia", "QtPrintSupport", "QtSvg", "QtXmlPatterns", "QtXml", 
diff --git a/src/pymod/__init__.py.qtless b/src/pymod/__init__.py.qtless
index 782df0624..757a6fa6a 100644
--- a/src/pymod/__init__.py.qtless
+++ b/src/pymod/__init__.py.qtless
@@ -1,4 +1,5 @@
 # klayout library definition file
 
+from .tl import __version__
 __all__ = [ "tl", "db", "lib", "rdb", "lay" ]
 
diff --git a/src/pymod/tl/tlMain.cc b/src/pymod/tl/tlMain.cc
index f9603c18d..b006eee7f 100644
--- a/src/pymod/tl/tlMain.cc
+++ b/src/pymod/tl/tlMain.cc
@@ -23,3 +23,4 @@
 #include "../pymodHelper.h"
 
 DEFINE_PYMOD(tlcore, "tl", "KLayout core module 'tl'")
+
diff --git a/testdata/python/basic.py b/testdata/python/basic.py
index 2c43d39cd..fe720a451 100644
--- a/testdata/python/basic.py
+++ b/testdata/python/basic.py
@@ -2241,6 +2241,8 @@ class BasicTest(unittest.TestCase):
 
   def test_38(self):
 
+    pya.E.reset_inst()
+
     # mixed const / non-const reference and events
     ec = pya.E.ic()
     self.assertEqual(ec.is_const_object(), True)
diff --git a/testdata/python/modTests.py b/testdata/python/modTests.py
new file mode 100644
index 000000000..a0c9ee3e7
--- /dev/null
+++ b/testdata/python/modTests.py
@@ -0,0 +1,43 @@
+# KLayout Layout Viewer
+# Copyright (C) 2006-2024 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
+
+
+import unittest
+
+class ModuleTest(unittest.TestCase):
+
+  def test_1(self):
+
+    import klayout as kl
+    self.assertEqual(kl.__version__ != "", True)
+
+    import klayout.db as kldb
+    self.assertEqual(kldb.__version__, kl.__version__)
+
+    import klayout.tl as kltl
+    self.assertEqual(kltl.__version__, kl.__version__)
+
+# run unit tests
+if __name__ == '__main__':
+  suite = unittest.TestSuite()
+  # NOTE: Use this instead of loadTestsfromTestCase to select a specific test:
+  #   suite.addTest(BasicTest("test_26"))
+  suite = unittest.TestLoader().loadTestsFromTestCase(BasicTest)
+
+  if not unittest.TextTestRunner(verbosity = 1).run(suite).wasSuccessful():
+    sys.exit(1)
+