diff --git a/test/test_cscripts_class.py b/test/test_cscripts_class.py
index 3262639..085a5cd 100755
--- a/test/test_cscripts_class.py
+++ b/test/test_cscripts_class.py
@@ -1,4 +1,3 @@
-#! /usr/bin/env python
 # ==========================================================================
 # cscripts test base class
 #
@@ -22,13 +21,14 @@ import os
 import gammalib
 
 
-# ======================= #
-# Test class for cscripts #
-# ======================= #
+# ======================================= #
+# Base class for unit testing of cscripts #
+# ======================================= #
 class cscripts_test(gammalib.GPythonTestSuite):
     """
     Test class for scripts
     """
+
     # Constructor
     def __init__(self):
         """
diff --git a/test/test_cssens.py b/test/test_cssens.py
index caf5685..b489190 100755
--- a/test/test_cssens.py
+++ b/test/test_cssens.py
@@ -39,6 +39,9 @@ class Test(test_cscripts_class.cscripts_test):
         """
         Constructor
         """
+        # Call base class constructor
+        test_cscripts_class.cscripts_test.__init__(self)
+
         # Return
         return