diff --git a/admin/tool/log/store/legacy/tests/store_test.php b/admin/tool/log/store/legacy/tests/store_test.php
index c77354496fd..a2aeb982b10 100644
--- a/admin/tool/log/store/legacy/tests/store_test.php
+++ b/admin/tool/log/store/legacy/tests/store_test.php
@@ -296,15 +296,9 @@ class logstore_legacy_store_testcase extends advanced_testcase {
         // Remove all logs before "today".
         set_config('loglifetime', 1);
 
-        try {
-            ob_start();
-            $clean = new \logstore_legacy\task\cleanup_task();
-            $clean->execute();
-            ob_end_clean();
-        } catch (Exception $e) {
-            ob_end_clean();
-            throw $e;
-        }
+        $this->expectOutputString(" Deleted old legacy log records\n");
+        $clean = new \logstore_legacy\task\cleanup_task();
+        $clean->execute();
 
         $this->assertEquals(1, $DB->count_records('log'));
     }
diff --git a/admin/tool/log/store/standard/tests/store_test.php b/admin/tool/log/store/standard/tests/store_test.php
index 23315565dbb..d28af981c28 100644
--- a/admin/tool/log/store/standard/tests/store_test.php
+++ b/admin/tool/log/store/standard/tests/store_test.php
@@ -306,15 +306,9 @@ class logstore_standard_store_testcase extends advanced_testcase {
         // Remove all logs before "today".
         set_config('loglifetime', 1, 'logstore_standard');
 
-        try {
-            ob_start();
-            $clean = new \logstore_standard\task\cleanup_task();
-            $clean->execute();
-            ob_end_clean();
-        } catch (Exception $e) {
-            ob_end_clean();
-            throw $e;
-        }
+        $this->expectOutputString(" Deleted old log records from standard store.\n");
+        $clean = new \logstore_standard\task\cleanup_task();
+        $clean->execute();
 
         $this->assertEquals(1, $DB->count_records('logstore_standard_log'));
     }