diff --git a/test/test_ctselect.py b/test/test_ctselect.py
index b0e9878..c6e687a 100755
--- a/test/test_ctselect.py
+++ b/test/test_ctselect.py
@@ -653,7 +653,7 @@ class Test(test):
         Unit Test expression selection
 
         """
-        select = self._setup(inobs=self._events,tmin=0.0,tmax=10.0,emin=0.2,emax=80,expr='TIME < 20000.0',outobs='ctselect_py_ExprSelectionUsed.fits',logfile='ctselect_py_ExprSelectionUsed.log')
+        select = self._setup(inobs=self._events,tmin=0.0,tmax=10.0,emin=0.2,emax=80,expr='TIME < 2.0',outobs='ctselect_py_ExprSelectionUsed.fits',logfile='ctselect_py_ExprSelectionUsed.log')
 
         # Run ctselect tool
         select.logFileOpen()   # Make sure we get a log file