diff --git a/examples/DDG4/scripts/TestProperties.py b/examples/DDG4/scripts/TestProperties.py
index 477b623669de5b2a6e4b64358d0193e374f49eeb..eb599d792f8ca4ac139f9ff0d1d99d2b238c9f72 100644
--- a/examples/DDG4/scripts/TestProperties.py
+++ b/examples/DDG4/scripts/TestProperties.py
@@ -112,16 +112,16 @@ def run():
                               (111 * GeV,222 * GeV,333 * GeV,444 * GeV)]
 
   #  Check read access:
-  print('--> %s'%(str('-------------------------------------------------------'),))
-  print('--> %s'%(str(act.prop_str),))              #     'Hello World!'
-  print('--> %s'%(str(act.prop_bool),))             #     True
-  print('--> %s'%(str(act.prop_int),))              #     1234
-  print('--> %s'%(str(act.prop_float),))            #     1234567.8
-  print('--> %s'%(str(act.prop_double),))           #     1234567.8
-  print('--> %s'%(str(act.prop_XYZPoint),))         #     (1,2,3)
-  print('--> %s'%(str(act.prop_XYZVector),))        #     (1 * m,2 * m,3 * m)
-  print('--> %s'%(str(act.prop_PxPyPzEVector),))    #     (1 * GeV,2 * GeV,3 * GeV,4 * GeV)
-  print('--> %s'%(str('-------------------------------------------------------'),))
+  print('--> {value}'.format(value='-------------------------------------------------------'))
+  print('--> {value}'.format(value=str(act.prop_str)))              #     'Hello World!'
+  print('--> {value}'.format(value=str(act.prop_bool)))             #     True
+  print('--> {value}'.format(value=str(act.prop_int)))              #     1234
+  print('--> {value}'.format(value=str(act.prop_float)))            #     1234567.8
+  print('--> {value}'.format(value=str(act.prop_double)))           #     1234567.8
+  print('--> {value}'.format(value=str(act.prop_XYZPoint)))         #     (1,2,3)
+  print('--> {value}'.format(value=str(act.prop_XYZVector)))        #     (1 * m,2 * m,3 * m)
+  print('--> {value}'.format(value=str(act.prop_PxPyPzEVector)))    #     (1 * GeV,2 * GeV,3 * GeV,4 * GeV)
+  print('--> {value}'.format(value='-------------------------------------------------------'))
 
   act.enableUI()