diff --git a/src/Configuration/ConfigurationKeys.php b/src/Configuration/ConfigurationKeys.php
index bb1c7d42..9712e58d 100644
--- a/src/Configuration/ConfigurationKeys.php
+++ b/src/Configuration/ConfigurationKeys.php
@@ -14,8 +14,12 @@
 
 namespace Humbug\PhpScoper\Configuration;
 
+use Humbug\PhpScoper\NotInstantiable;
+
 final class ConfigurationKeys
 {
+    use NotInstantiable;
+
     public const PREFIX_KEYWORD = 'prefix';
     public const OUTPUT_DIR_KEYWORD = 'output-dir';
     public const EXCLUDED_FILES_KEYWORD = 'exclude-files';
@@ -54,8 +58,4 @@ final class ConfigurationKeys
         self::FUNCTIONS_INTERNAL_SYMBOLS_KEYWORD,
         self::CONSTANTS_INTERNAL_SYMBOLS_KEYWORD,
     ];
-
-    private function __construct()
-    {
-    }
 }
diff --git a/src/Configuration/SymbolsConfiguration.php b/src/Configuration/SymbolsConfiguration.php
index 9e9d8671..dec9e854 100644
--- a/src/Configuration/SymbolsConfiguration.php
+++ b/src/Configuration/SymbolsConfiguration.php
@@ -14,11 +14,14 @@
 
 namespace Humbug\PhpScoper\Configuration;
 
+use Humbug\PhpScoper\NotInstantiable;
 use Humbug\PhpScoper\Symbol\NamespaceRegistry;
 use Humbug\PhpScoper\Symbol\SymbolRegistry;
 
 final class SymbolsConfiguration
 {
+    use NotInstantiable;
+
     // To keep in sync with the default configuration set in src/scoper.inc.php.tpl
     public static function create(
         bool $exposeGlobalConstants = true,
diff --git a/src/Console/Command/ChangeableDirectory.php b/src/Console/Command/ChangeableDirectory.php
index 07e52866..10d52752 100644
--- a/src/Console/Command/ChangeableDirectory.php
+++ b/src/Console/Command/ChangeableDirectory.php
@@ -15,6 +15,7 @@
 namespace Humbug\PhpScoper\Console\Command;
 
 use Fidry\Console\Input\IO;
+use Humbug\PhpScoper\NotInstantiable;
 use InvalidArgumentException;
 use Symfony\Component\Console\Exception\RuntimeException;
 use Symfony\Component\Console\Input\InputOption;
@@ -29,11 +30,9 @@
  */
 final class ChangeableDirectory
 {
-    private const WORKING_DIR_OPT = 'working-dir';
+    use NotInstantiable;
 
-    private function __construct()
-    {
-    }
+    private const WORKING_DIR_OPT = 'working-dir';
 
     public static function createOption(): InputOption
     {
diff --git a/src/NotInstantiable.php b/src/NotInstantiable.php
new file mode 100644
index 00000000..81e7ee81
--- /dev/null
+++ b/src/NotInstantiable.php
@@ -0,0 +1,25 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of the humbug/php-scoper package.
+ *
+ * Copyright (c) 2017 Théo FIDRY <theo.fidry@gmail.com>,
+ *                    Pádraic Brady <padraic.brady@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Humbug\PhpScoper;
+
+/**
+ * @private
+ */
+trait NotInstantiable
+{
+    private function __construct()
+    {
+    }
+}
diff --git a/src/PhpParser/Node/FullyQualifiedFactory.php b/src/PhpParser/Node/FullyQualifiedFactory.php
index aec6e569..1b095215 100644
--- a/src/PhpParser/Node/FullyQualifiedFactory.php
+++ b/src/PhpParser/Node/FullyQualifiedFactory.php
@@ -14,12 +14,15 @@
 
 namespace Humbug\PhpScoper\PhpParser\Node;
 
+use Humbug\PhpScoper\NotInstantiable;
 use InvalidArgumentException;
 use PhpParser\Node\Name;
 use PhpParser\Node\Name\FullyQualified;
 
 final class FullyQualifiedFactory
 {
+    use NotInstantiable;
+
     /**
      * @param string|string[]|Name|null $name1
      * @param string|string[]|Name|null $name2
@@ -32,8 +35,4 @@ public static function concat($name1, $name2, array $attributes = []): FullyQual
 
         return FullyQualified::concat($name1, $name2, $attributes);
     }
-
-    private function __construct()
-    {
-    }
 }
diff --git a/src/PhpParser/Node/NameFactory.php b/src/PhpParser/Node/NameFactory.php
index 375fa239..7b70181d 100644
--- a/src/PhpParser/Node/NameFactory.php
+++ b/src/PhpParser/Node/NameFactory.php
@@ -14,11 +14,14 @@
 
 namespace Humbug\PhpScoper\PhpParser\Node;
 
+use Humbug\PhpScoper\NotInstantiable;
 use InvalidArgumentException;
 use PhpParser\Node\Name;
 
 final class NameFactory
 {
+    use NotInstantiable;
+
     /**
      * @param string|string[]|Name|null $name1
      * @param string|string[]|Name|null $name2
@@ -31,8 +34,4 @@ public static function concat($name1, $name2, array $attributes = []): Name
 
         return Name::concat($name1, $name2, $attributes);
     }
-
-    private function __construct()
-    {
-    }
 }
diff --git a/src/PhpParser/NodeVisitor/NamespaceStmt/NamespaceManipulator.php b/src/PhpParser/NodeVisitor/NamespaceStmt/NamespaceManipulator.php
index 04c74d06..a2a18da2 100644
--- a/src/PhpParser/NodeVisitor/NamespaceStmt/NamespaceManipulator.php
+++ b/src/PhpParser/NodeVisitor/NamespaceStmt/NamespaceManipulator.php
@@ -14,6 +14,7 @@
 
 namespace Humbug\PhpScoper\PhpParser\NodeVisitor\NamespaceStmt;
 
+use Humbug\PhpScoper\NotInstantiable;
 use PhpParser\Node\Name;
 use PhpParser\Node\Stmt\Namespace_;
 use PhpParser\NodeVisitorAbstract;
@@ -23,6 +24,8 @@
  */
 final class NamespaceManipulator extends NodeVisitorAbstract
 {
+    use NotInstantiable;
+
     private const ORIGINAL_NAME_ATTRIBUTE = 'originalName';
 
     public static function hasOriginalName(Namespace_ $namespace): bool
@@ -43,8 +46,4 @@ public static function setOriginalName(Namespace_ $namespace, ?Name $originalNam
     {
         $namespace->setAttribute(self::ORIGINAL_NAME_ATTRIBUTE, $originalName);
     }
-
-    private function __construct()
-    {
-    }
 }
diff --git a/src/PhpParser/NodeVisitor/Resolver/OriginalNameResolver.php b/src/PhpParser/NodeVisitor/Resolver/OriginalNameResolver.php
index be473507..071c9c86 100644
--- a/src/PhpParser/NodeVisitor/Resolver/OriginalNameResolver.php
+++ b/src/PhpParser/NodeVisitor/Resolver/OriginalNameResolver.php
@@ -14,10 +14,13 @@
 
 namespace Humbug\PhpScoper\PhpParser\NodeVisitor\Resolver;
 
+use Humbug\PhpScoper\NotInstantiable;
 use PhpParser\Node\Name;
 
 final class OriginalNameResolver
 {
+    use NotInstantiable;
+
     private const ORIGINAL_NAME_ATTRIBUTE = 'originalName';
 
     public static function hasOriginalName(Name $namespace): bool
@@ -33,8 +36,4 @@ public static function getOriginalName(Name $name): Name
 
         return $name->getAttribute(self::ORIGINAL_NAME_ATTRIBUTE);
     }
-
-    private function __construct()
-    {
-    }
 }
diff --git a/src/PhpParser/NodeVisitor/UseStmt/UseStmtManipulator.php b/src/PhpParser/NodeVisitor/UseStmt/UseStmtManipulator.php
index 0ad2eb76..df13fe0d 100644
--- a/src/PhpParser/NodeVisitor/UseStmt/UseStmtManipulator.php
+++ b/src/PhpParser/NodeVisitor/UseStmt/UseStmtManipulator.php
@@ -14,6 +14,7 @@
 
 namespace Humbug\PhpScoper\PhpParser\NodeVisitor\UseStmt;
 
+use Humbug\PhpScoper\NotInstantiable;
 use PhpParser\Node\Name;
 use PhpParser\Node\Stmt\UseUse;
 use PhpParser\NodeVisitorAbstract;
@@ -23,6 +24,8 @@
  */
 final class UseStmtManipulator extends NodeVisitorAbstract
 {
+    use NotInstantiable;
+
     private const ORIGINAL_NAME_ATTRIBUTE = 'originalName';
 
     public static function hasOriginalName(UseUse $use): bool
@@ -43,8 +46,4 @@ public static function setOriginalName(UseUse $use, ?Name $originalName): void
     {
         $use->setAttribute(self::ORIGINAL_NAME_ATTRIBUTE, $originalName);
     }
-
-    private function __construct()
-    {
-    }
 }