--- t/doc.t
+++ t/doc.t
@@ -19,8 +19,6 @@ BEGIN
         # If Date::Manip can't determine the time zone, it'll bomb out of the tests.
         $dm_notz = eval('Date::Manip::Date_TimeZone (); 1')? 0 : 1;
     }
-    delete $INC{'Date/Manip.pm'};
-    %Date::Manip:: = ();
 }
 
 # Were all variables imported? (3)
--- t/funcs.t
+++ t/funcs.t
@@ -22,8 +22,6 @@ BEGIN {
         # If Date::Manip can't determine the time zone, it'll bomb out of the tests.
         $manip_notz = eval ('Date::Manip::Date_TimeZone (); 1')? 0 : 1;
     }
-    delete $INC{'Date/Manip.pm'};
-    %Date::Manip:: = ();
 }
 
 # Get day/month names in current locale
--- t/manip.t
+++ t/manip.t
@@ -18,8 +18,6 @@ BEGIN
         $manip_bad = 'Date::Manip cannot determine time zone'
             unless eval 'Date::Manip::Date_TimeZone(); 1';
     }
-    delete $INC{'Date/Manip.pm'};
-    %Date::Manip:: = ();
 }
 
 my $t = 'first thursday in june 2003';