diff --git a/testing/dav_test b/testing/dav_test
index 1eadae84..c1e3d1e1 100755
--- a/testing/dav_test
+++ b/testing/dav_test
@@ -330,6 +330,7 @@ with DBD::Pg.
 sub opendb {
   $dsn = "dbi:Pg:dbname=$dsn";
   $dbh = DBI->connect($dsn, $dbuser, $dbpass, { AutoCommit => 1 } ) or die "Can't connect to database $dsn";
+  $dbh->do("SET TIMEZONE TO 'Pacific/Auckland'");
 }
 
 
diff --git a/testing/run_regressions.sh b/testing/run_regressions.sh
index 4da6949a..59fe9b4f 100755
--- a/testing/run_regressions.sh
+++ b/testing/run_regressions.sh
@@ -8,6 +8,7 @@ HOSTNAME=regression
 
 # We need to run the regression tests in the timezone they were written for.
 export PGTZ=Pacific/Auckland
+export TZ=Pacific/Auckland
 
 ALLSUITES="regression-suite binding carddav scheduling timezone"