MDL-38989 add missing test timeout reset

course/tests/externallib_test.php

@@ -636,6 +636,9 @@ class core_course_external_testcase extends externallib_advanced_testcase {
 
         // Check that the course has been duplicated.
         $this->assertEquals($newcourse['shortname'], $duplicate['shortname']);
+
+        // Reset the timeouts.
+        set_time_limit(0);
     }
 
     /**

lib/tests/statslib_test.php

@@ -111,6 +111,11 @@ class statslib_daily_testcase extends advanced_testcase {
         $this->resetAfterTest(true);
     }
 
+    protected function tearDown() {
+        // Reset the timeouts.
+        set_time_limit(0);
+    }
+
     /**
      * Function to setup database.
      *

mod/assign/tests/upgradelib_test.php

@@ -40,6 +40,11 @@ require_once($CFG->dirroot . '/mod/assign/tests/base_test.php');
  */
 class mod_assign_upgradelib_testcase extends mod_assign_base_testcase {
 
+    protected function tearDown() {
+        // Reset the timeouts.
+        set_time_limit(0);
+    }
+
     public function test_upgrade_upload_assignment() {
         global $DB;