diff --git a/tests/data/test517 b/tests/data/test517
index b7d2af6078..7187e86780 100644
--- a/tests/data/test517
+++ b/tests/data/test517
@@ -17,11 +17,6 @@ lib517
  <name>
 curl_getdate() testing
  </name>
-# Explicitly set the time zone to a known good one, in case the user is
-# using one of the 'right' zones that take into account leap seconds
-# which causes the cookie expiry times to be different.
-<setenv>
-</setenv>
  <command>
 nothing
 </command>