diff -u b/core/modules/dblog/tests/src/Functional/UpdatePathTest.php b/core/modules/dblog/tests/src/Functional/UpdatePathTest.php
--- b/core/modules/dblog/tests/src/Functional/UpdatePathTest.php
+++ b/core/modules/dblog/tests/src/Functional/UpdatePathTest.php
@@ -2,10 +2,8 @@
 
 namespace Drupal\Tests\dblog\Functional;
 
-use Drupal\Core\Database\Connection;
 use Drupal\Core\Database\Database;
 use Drupal\FunctionalTests\Update\UpdatePathTestBase;
-use Drupal\dblog\Logger\DbLog;
 use Prophecy\PhpUnit\ProphecyTrait;
 
 /**
@@ -36,28 +34,15 @@
     }
     $this->runUpdates();
 
-    $connection = $this->prophesize(Connection::class);
-    $connection->getTarget()->willReturn(DbLog::DEDICATED_DBLOG_CONNECTION_TARGET);
-
     // Insert a row with a big value for wid.
-    $connection->insert('watchdog')->willReturnCallback(function ($table, $fields) {
-      // Set the 'wid' column of the query to a value which will
-      // overflow the 32-bit integer limit.
-      $fields['wid'] = PHP_INT_MAX;
-      return Database::getConnection()->insert($table)->fields($fields)->execute();
-    });
+    $insert = Database::getConnection()->insert('watchdog');
+    $insert->fields(['wid' => PHP_INT_MAX]);
+    $insert->execute();
 
     // Insert another row without a value for wid, to test auto-increment.
-    $connection->insert('watchdog')->willReturnCallback(function ($table, $fields) {
-      // Do not set the 'wid' column, to test auto-increment.
-      return Database::getConnection()->insert($table)->fields($fields)->execute();
-    });
+    $insert = Database::getConnection()->insert('watchdog');
+    $insert->execute();
 
-    $this->container->set('database', $connection->reveal());
-
-    // Generate two log entries: one with a big value for wid, and one without.
-    $this->generateLogEntries(2);
-
     // Test that the first row exists with the expected value for wid.
     $result = Database::getConnection()->select('watchdog')
       ->fields('watchdog', ['wid'])