diff --git a/core/lib/Drupal/Core/Database/Connection.php b/core/lib/Drupal/Core/Database/Connection.php
index 9259c6729b..ba7b3fc65f 100644
--- a/core/lib/Drupal/Core/Database/Connection.php
+++ b/core/lib/Drupal/Core/Database/Connection.php
@@ -460,7 +460,7 @@ public function getFullQualifiedTableName($table) {
    */
   public function prepareQuery($query, array $options = []) {
     $query = $this->prefixTables($query);
-    if (!empty($options['real_square_brackets'])) {
+    if (empty($options['real_square_brackets'])) {
       $query = $this->quoteIdentifiers($query);
     }
 
diff --git a/core/tests/Drupal/KernelTests/Core/Database/ConnectionTest.php b/core/tests/Drupal/KernelTests/Core/Database/ConnectionTest.php
index 47e11dadf9..080f4787b3 100644
--- a/core/tests/Drupal/KernelTests/Core/Database/ConnectionTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Database/ConnectionTest.php
@@ -155,23 +155,4 @@ public function testMultipleStatements() {
     }
   }
 
-  /**
-   * Test the escapeTable(), escapeField() and escapeAlias() methods with all possible reserved words in PostgreSQL.
-   */
-  public function testPostgresqlReservedWords() {
-    if (Database::getConnection()->databaseType() !== 'pgsql') {
-      return;
-    }
-
-    $db = Database::getConnection('default', 'default');
-    $stmt = $db->query("SELECT word FROM pg_get_keywords() WHERE catcode IN ('R', 'T')");
-    $stmt->execute();
-    foreach ($stmt->fetchAllAssoc('word') as $word => $row) {
-      $expected = '"' . $word . '"';
-      $this->assertIdentical($db->escapeTable($word), $expected, format_string('The reserved word %word was correctly escaped when used as a table name.', ['%word' => $word]));
-      $this->assertIdentical($db->escapeField($word), $expected, format_string('The reserved word %word was correctly escaped when used as a column name.', ['%word' => $word]));
-      $this->assertIdentical($db->escapeAlias($word), $expected, format_string('The reserved word %word was correctly escaped when used as an alias.', ['%word' => $word]));
-    }
-  }
-
 }