diff --git a/tests/Composer/Test/Autoload/Fixtures/autoload_real_files_by_dependency.php b/tests/Composer/Test/Autoload/Fixtures/autoload_real_files_by_dependency.php
index 7f274d55e..ead6d15bd 100644
--- a/tests/Composer/Test/Autoload/Fixtures/autoload_real_files_by_dependency.php
+++ b/tests/Composer/Test/Autoload/Fixtures/autoload_real_files_by_dependency.php
@@ -26,7 +26,7 @@ class ComposerAutoloaderInitFilesAutoloadOrder
         if (PHP_VERSION_ID >= 50600) {
             require_once __DIR__ . '/autoload_static.php';
 
-            \call_user_func(\Composer\Autoload\ComposerStaticInitFilesAutoloadOrder::getInitializer($loader));
+            call_user_func(\Composer\Autoload\ComposerStaticInitFilesAutoloadOrder::getInitializer($loader));
         } else {
             $map = require __DIR__ . '/autoload_namespaces.php';
             foreach ($map as $namespace => $path) {
diff --git a/tests/Composer/Test/Autoload/Fixtures/autoload_real_functions.php b/tests/Composer/Test/Autoload/Fixtures/autoload_real_functions.php
index cb259167a..a8896bbcf 100644
--- a/tests/Composer/Test/Autoload/Fixtures/autoload_real_functions.php
+++ b/tests/Composer/Test/Autoload/Fixtures/autoload_real_functions.php
@@ -26,7 +26,7 @@ class ComposerAutoloaderInitFilesAutoload
         if (PHP_VERSION_ID >= 50600) {
             require_once __DIR__ . '/autoload_static.php';
 
-            \call_user_func(\Composer\Autoload\ComposerStaticInitFilesAutoload::getInitializer($loader));
+            call_user_func(\Composer\Autoload\ComposerStaticInitFilesAutoload::getInitializer($loader));
         } else {
             $map = require __DIR__ . '/autoload_namespaces.php';
             foreach ($map as $namespace => $path) {
diff --git a/tests/Composer/Test/Autoload/Fixtures/autoload_real_functions_with_include_paths.php b/tests/Composer/Test/Autoload/Fixtures/autoload_real_functions_with_include_paths.php
index 40da00394..220f7ae3d 100644
--- a/tests/Composer/Test/Autoload/Fixtures/autoload_real_functions_with_include_paths.php
+++ b/tests/Composer/Test/Autoload/Fixtures/autoload_real_functions_with_include_paths.php
@@ -30,7 +30,7 @@ class ComposerAutoloaderInitFilesAutoload
         if (PHP_VERSION_ID >= 50600) {
             require_once __DIR__ . '/autoload_static.php';
 
-            \call_user_func(\Composer\Autoload\ComposerStaticInitFilesAutoload::getInitializer($loader));
+            call_user_func(\Composer\Autoload\ComposerStaticInitFilesAutoload::getInitializer($loader));
         } else {
             $map = require __DIR__ . '/autoload_namespaces.php';
             foreach ($map as $namespace => $path) {
diff --git a/tests/Composer/Test/Autoload/Fixtures/autoload_real_functions_with_removed_include_paths_and_autolad_files.php b/tests/Composer/Test/Autoload/Fixtures/autoload_real_functions_with_removed_include_paths_and_autolad_files.php
index cd1d3f66b..c983006a3 100644
--- a/tests/Composer/Test/Autoload/Fixtures/autoload_real_functions_with_removed_include_paths_and_autolad_files.php
+++ b/tests/Composer/Test/Autoload/Fixtures/autoload_real_functions_with_removed_include_paths_and_autolad_files.php
@@ -26,7 +26,7 @@ class ComposerAutoloaderInitFilesAutoload
         if (PHP_VERSION_ID >= 50600) {
             require_once __DIR__ . '/autoload_static.php';
 
-            \call_user_func(\Composer\Autoload\ComposerStaticInitFilesAutoload::getInitializer($loader));
+            call_user_func(\Composer\Autoload\ComposerStaticInitFilesAutoload::getInitializer($loader));
         } else {
             $map = require __DIR__ . '/autoload_namespaces.php';
             foreach ($map as $namespace => $path) {
diff --git a/tests/Composer/Test/Autoload/Fixtures/autoload_real_include_path.php b/tests/Composer/Test/Autoload/Fixtures/autoload_real_include_path.php
index e9dbd8b3e..fbcc81426 100644
--- a/tests/Composer/Test/Autoload/Fixtures/autoload_real_include_path.php
+++ b/tests/Composer/Test/Autoload/Fixtures/autoload_real_include_path.php
@@ -26,7 +26,7 @@ class ComposerAutoloaderInitIncludePath
         if (PHP_VERSION_ID >= 50600) {
             require_once __DIR__ . '/autoload_static.php';
 
-            \call_user_func(\Composer\Autoload\ComposerStaticInitIncludePath::getInitializer($loader));
+            call_user_func(\Composer\Autoload\ComposerStaticInitIncludePath::getInitializer($loader));
         } else {
             $map = require __DIR__ . '/autoload_namespaces.php';
             foreach ($map as $namespace => $path) {
diff --git a/tests/Composer/Test/Autoload/Fixtures/autoload_real_target_dir.php b/tests/Composer/Test/Autoload/Fixtures/autoload_real_target_dir.php
index 1694d26f1..7e0b885f7 100644
--- a/tests/Composer/Test/Autoload/Fixtures/autoload_real_target_dir.php
+++ b/tests/Composer/Test/Autoload/Fixtures/autoload_real_target_dir.php
@@ -26,7 +26,7 @@ class ComposerAutoloaderInitTargetDir
         if (PHP_VERSION_ID >= 50600) {
             require_once __DIR__ . '/autoload_static.php';
 
-            \call_user_func(\Composer\Autoload\ComposerStaticInitTargetDir::getInitializer($loader));
+            call_user_func(\Composer\Autoload\ComposerStaticInitTargetDir::getInitializer($loader));
         } else {
             $map = require __DIR__ . '/autoload_namespaces.php';
             foreach ($map as $namespace => $path) {