Check if no alias was created before

tests/phpunit_aliases.php

@@ -4,12 +4,14 @@ if (class_exists('PHPUnit_Runner_Version')) {
         trigger_error(sprintf('Your PHPUnit Version must be at least 5.7.0 to use CakePHP Testsuite, found %s', \PHPUnit_Runner_Version::id()), E_USER_ERROR);
     }
 
-    class_alias('PHPUnit_Framework_Test', 'PHPUnit\Framework\Test');
-    class_alias('PHPUnit_Framework_AssertionFailedError', 'PHPUnit\Framework\AssertionFailedError');
-    class_alias('PHPUnit_Framework_TestSuite', 'PHPUnit\Framework\TestSuite');
-    class_alias('PHPUnit_Framework_TestResult', 'PHPUnit\Framework\TestResult');
-    class_alias('PHPUnit_Framework_Error', 'PHPUnit\Framework\Error\Error');
-    class_alias('PHPUnit_Framework_Error_Deprecated', 'PHPUnit\Framework\Error\Deprecated');
-    class_alias('PHPUnit_Framework_Error_Warning', 'PHPUnit\Framework\Error\Warning');
-    class_alias('PHPUnit_Framework_ExpectationFailedException', 'PHPUnit\Framework\ExpectationFailedException');
+	if (!class_exists('PHPUnit_Framework_Test') && class_exists('PHPUnit_Framework_TestCase')) {
+		class_alias('PHPUnit_Framework_Test', 'PHPUnit\Framework\Test');
+		class_alias('PHPUnit_Framework_AssertionFailedError', 'PHPUnit\Framework\AssertionFailedError');
+		class_alias('PHPUnit_Framework_TestSuite', 'PHPUnit\Framework\TestSuite');
+		class_alias('PHPUnit_Framework_TestResult', 'PHPUnit\Framework\TestResult');
+		class_alias('PHPUnit_Framework_Error', 'PHPUnit\Framework\Error\Error');
+		class_alias('PHPUnit_Framework_Error_Deprecated', 'PHPUnit\Framework\Error\Deprecated');
+		class_alias('PHPUnit_Framework_Error_Warning', 'PHPUnit\Framework\Error\Warning');
+		class_alias('PHPUnit_Framework_ExpectationFailedException', 'PHPUnit\Framework\ExpectationFailedException');
+	}
 }