diff --git a/testing/dav_test b/testing/dav_test
index 1598b8e4..8f69d39e 100755
--- a/testing/dav_test
+++ b/testing/dav_test
@@ -42,6 +42,8 @@ usage() if ( $helpmeplease || ((!defined($suite) || !defined($case)) && !defined
 
 my $dbh;
 
+# Allow enabling debugging via an environment variable. Useful for debugging CI.
+$debug = 1 if ($ENV{DEBUG} || 0) == 1;
 
 my @arguments = ( "--basic", "--proxy", "", "--insecure" );
 push @arguments, "--silent"  unless ( $debug );