diff --git a/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php b/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
index 520a886deba79..92d039c9ed7c8 100644
--- a/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
+++ b/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
@@ -2017,7 +2017,15 @@ private function export($value)
             $suffix = $matches[0][1] + \strlen($matches[0][0]);
             $matches[0][1] += \strlen($matches[1][0]);
             $prefix = $matches[0][1] ? $this->doExport(substr($value, 0, $matches[0][1]), true).'.' : '';
-            $suffix = isset($value[$suffix]) ? '.'.$this->doExport(substr($value, $suffix), true) : '';
+
+            if ('\\' === \DIRECTORY_SEPARATOR && isset($value[$suffix])) {
+                $cookie = '\\'.random_int(100000, \PHP_INT_MAX);
+                $suffix = '.'.$this->doExport(str_replace('\\', $cookie, substr($value, $suffix)), true);
+                $suffix = str_replace('\\'.$cookie, "'.\\DIRECTORY_SEPARATOR.'", $suffix);
+            } else {
+                $suffix = isset($value[$suffix]) ? '.'.$this->doExport(substr($value, $suffix), true) : '';
+            }
+
             $dirname = $this->asFiles ? '$this->containerDir' : '__DIR__';
             $offset = 2 + $this->targetDirMaxMatches - \count($matches);
 
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php b/src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php
index de88e8b22f19d..5875253d862c1 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php
@@ -233,7 +233,7 @@ public function testDumpAsFiles()
         $dumper = new PhpDumper($container);
         $dump = print_r($dumper->dump(['as_files' => true, 'file' => __DIR__, 'hot_path_tag' => 'hot']), true);
         if ('\\' === \DIRECTORY_SEPARATOR) {
-            $dump = str_replace('\\\\Fixtures\\\\includes\\\\foo.php', '/Fixtures/includes/foo.php', $dump);
+            $dump = str_replace("'.\\DIRECTORY_SEPARATOR.'", '/', $dump);
         }
         $this->assertStringMatchesFormatFile(self::$fixturesPath.'/php/services9_as_files.txt', $dump);
     }
@@ -260,7 +260,7 @@ public function testDumpAsFilesWithFactoriesInlined()
         $dump = print_r($dumper->dump(['as_files' => true, 'file' => __DIR__, 'hot_path_tag' => 'hot', 'build_time' => 1563381341]), true);
 
         if ('\\' === \DIRECTORY_SEPARATOR) {
-            $dump = str_replace('\\\\Fixtures\\\\includes\\\\', '/Fixtures/includes/', $dump);
+            $dump = str_replace("'.\\DIRECTORY_SEPARATOR.'", '/', $dump);
         }
         $this->assertStringMatchesFormatFile(self::$fixturesPath.'/php/services9_inlined_factories.txt', $dump);
     }
@@ -286,7 +286,7 @@ public function testDumpAsFilesWithLazyFactoriesInlined()
         $dump = print_r($dumper->dump(['as_files' => true, 'file' => __DIR__, 'hot_path_tag' => 'hot', 'build_time' => 1563381341]), true);
 
         if ('\\' === \DIRECTORY_SEPARATOR) {
-            $dump = str_replace('\\\\Fixtures\\\\includes\\\\', '/Fixtures/includes/', $dump);
+            $dump = str_replace("'.\\DIRECTORY_SEPARATOR.'", '/', $dump);
         }
         $this->assertStringMatchesFormatFile(self::$fixturesPath.'/php/services9_lazy_inlined_factories.txt', $dump);
     }
@@ -304,7 +304,7 @@ public function testNonSharedLazyDumpAsFiles()
         $dump = print_r($dumper->dump(['as_files' => true, 'file' => __DIR__]), true);
 
         if ('\\' === \DIRECTORY_SEPARATOR) {
-            $dump = str_replace('\\\\Fixtures\\\\includes\\\\foo_lazy.php', '/Fixtures/includes/foo_lazy.php', $dump);
+            $dump = str_replace("'.\\DIRECTORY_SEPARATOR.'", '/', $dump);
         }
         $this->assertStringMatchesFormatFile(self::$fixturesPath.'/php/services_non_shared_lazy_as_files.txt', $dump);
     }
@@ -980,7 +980,7 @@ public function testArrayParameters()
 
         $dumper = new PhpDumper($container);
 
-        $this->assertStringEqualsFile(self::$fixturesPath.'/php/services_array_params.php', str_replace('\\\\Dumper', '/Dumper', $dumper->dump(['file' => self::$fixturesPath.'/php/services_array_params.php'])));
+        $this->assertStringEqualsFile(self::$fixturesPath.'/php/services_array_params.php', str_replace("'.\\DIRECTORY_SEPARATOR.'", '/', $dumper->dump(['file' => self::$fixturesPath.'/php/services_array_params.php'])));
     }
 
     public function testExpressionReferencingPrivateService()
@@ -1143,7 +1143,7 @@ public function testHotPathOptimizations()
 
         $dump = $dumper->dump(['hot_path_tag' => 'container.hot_path', 'inline_class_loader_parameter' => 'inline_requires', 'file' => self::$fixturesPath.'/php/services_inline_requires.php']);
         if ('\\' === \DIRECTORY_SEPARATOR) {
-            $dump = str_replace("'\\\\includes\\\\HotPath\\\\", "'/includes/HotPath/", $dump);
+            $dump = str_replace("'.\\DIRECTORY_SEPARATOR.'", '/', $dump);
         }
 
         $this->assertStringEqualsFile(self::$fixturesPath.'/php/services_inline_requires.php', $dump);

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