diff --git a/sandbox/servers/5.6/my.sandbox.cnf b/sandbox/servers/5.6/my.sandbox.cnf
index 24bfa584..3ee3f791 100644
--- a/sandbox/servers/5.6/my.sandbox.cnf
+++ b/sandbox/servers/5.6/my.sandbox.cnf
@@ -26,3 +26,4 @@ log-error                  = /tmp/PORT/data/mysqld.log
 innodb_lock_wait_timeout   = 3
 general_log
 general_log_file           = genlog
+secure-file-priv           = 
diff --git a/t/lib/ExplainAnalyzer.t b/t/lib/ExplainAnalyzer.t
index 43484760..86c9638c 100644
--- a/t/lib/ExplainAnalyzer.t
+++ b/t/lib/ExplainAnalyzer.t
@@ -52,7 +52,7 @@ my $want = [
            key_len       => 2,
            ref           => 'const',
            rows          => 1,
-           Extra         => $sandbox_version gt '5.6' ? undef : '',
+           Extra         => $sandbox_version eq '5.6' ? undef : '',
          },
       ];
 if ( $sandbox_version gt '5.6' ) {
diff --git a/t/pt-table-checksum/basics.t b/t/pt-table-checksum/basics.t
index a81881ca..9be83a7a 100644
--- a/t/pt-table-checksum/basics.t
+++ b/t/pt-table-checksum/basics.t
@@ -105,7 +105,7 @@ ok(
 
 $row = $master_dbh->selectrow_arrayref("select count(*) from percona.checksums");
 
-my $max_rows = $sandbox_version < '5.7' ? 75 : 100;
+my $max_rows = $sandbox_version < '5.7' ? 90 : 100;
 ok(
    $row->[0] >= 75 && $row->[0] <= $max_rows,
    'Between 75 and 90 chunks on master'