diff --git a/.php_cs b/.php_cs
new file mode 100644
index 0000000..89dd374
--- /dev/null
+++ b/.php_cs
@@ -0,0 +1,130 @@
+<?php
+
+$finder = PhpCsFixer\Finder::create()
+    ->files()
+    ->name('*.php')
+    ->in(__DIR__ . '/src')
+    ->in(__DIR__ . '/tests')
+;
+
+return PhpCsFixer\Config::create()
+    ->setRules(array(
+        '@PSR2' => true,
+        'array_syntax' => ['syntax' => 'short'],
+        'binary_operator_spaces' => ['align_double_arrow' => false, 'align_equals' => false],
+        'blank_line_after_namespace' => true,
+        'blank_line_after_opening_tag' => false,
+        'blank_line_before_return' => false,
+        'braces' => ['allow_single_line_closure' => false],
+        'cast_spaces' => true,
+        'class_definition' => ['singleLine' => false, 'singleItemSingleLine' => true, 'multiLineExtendsEachSingleLine' => true],
+        'class_keyword_remove' => false,
+        'combine_consecutive_unsets' => true,
+        'concat_space' => false,
+        'declare_equal_normalize' => ['space' => 'single'],
+        'declare_strict_types' => false,
+        'elseif' => true,
+        'encoding' => true,
+        'full_opening_tag' => true,
+        'function_declaration' => true,
+        'function_typehint_space' => true,
+        'general_phpdoc_annotation_remove' => ['expectedExceptionMessageRegExp', 'expectedException', 'expectedExceptionMessage'],
+        'hash_to_slash_comment' => true,
+        'header_comment' => false,
+        'heredoc_to_nowdoc' => true,
+        'include' => true,
+        'indentation_type' => true,
+        'line_ending' => true,
+        'linebreak_after_opening_tag' => true,
+        'lowercase_cast' => true,
+        'lowercase_constants' => true,
+        'lowercase_keywords' => true,
+        'mb_str_functions' => false,
+        'method_argument_space' => true,
+        'method_separation' => true,
+        'native_function_casing' => true,
+        'native_function_invocation' => false,
+        'new_with_braces' => true,
+        'no_blank_lines_after_class_opening' => true,
+        'no_blank_lines_after_phpdoc' => false,
+        'no_blank_lines_before_namespace' => false,
+        'no_closing_tag' => true,
+        'no_empty_comment' => true,
+        'no_empty_phpdoc' => true,
+        'no_empty_statement' => true,
+        'no_extra_consecutive_blank_lines' => ['break', 'continue', 'extra', 'return', 'throw', 'use', 'parenthesis_brace_block', 'square_brace_block', 'curly_brace_block'],
+        'no_leading_import_slash' => true,
+        'no_leading_namespace_whitespace' => true,
+        'no_mixed_echo_print' => ['use' => 'echo'],
+        'no_multiline_whitespace_around_double_arrow' => true,
+        'no_multiline_whitespace_before_semicolons' => true,
+        'no_short_bool_cast' => true,
+        'no_short_echo_tag' => true,
+        'no_singleline_whitespace_before_semicolons' => true,
+        'no_spaces_after_function_name' => true,
+        'no_spaces_around_offset' => true,
+        'no_spaces_inside_parenthesis' => true,
+        'no_trailing_comma_in_list_call' => true,
+        'no_trailing_comma_in_singleline_array' => true,
+        'no_trailing_whitespace' => true,
+        'no_trailing_whitespace_in_comment' => true,
+        'no_unneeded_control_parentheses' => true,
+        'no_unused_imports' => true,
+        'no_useless_else' => true,
+        'no_useless_return' => true,
+        'no_whitespace_before_comma_in_array' => true,
+        'no_whitespace_in_blank_line' => true,
+        'normalize_index_brace' => true,
+        'not_operator_with_space' => false,
+        'not_operator_with_successor_space' => false,
+        'object_operator_without_whitespace' => true,
+        'ordered_class_elements' => false,
+        'ordered_imports' => true,
+        'php_unit_fqcn_annotation' => true,
+        'php_unit_strict' => false,
+        'phpdoc_add_missing_param_annotation' => true,
+        'phpdoc_align' => true,
+        'phpdoc_inline_tag' => true,
+        'phpdoc_no_access' => true,
+        'phpdoc_no_alias_tag' => ['property-read' => 'property', 'property-write' => 'property', 'type' => 'var'],
+        'phpdoc_no_empty_return' => true,
+        'phpdoc_no_package' => true,
+        'phpdoc_no_useless_inheritdoc' => true,
+        'phpdoc_order' => true,
+        'phpdoc_return_self_reference' => true,
+        'phpdoc_scalar' => true,
+        'phpdoc_separation' => false,
+        'phpdoc_single_line_var_spacing' => true,
+        'phpdoc_summary' => false,
+        'phpdoc_to_comment' => true,
+        'phpdoc_trim' => true,
+        'phpdoc_types' => true,
+        'phpdoc_var_without_name' => true,
+        'pow_to_exponentiation' => false,
+        'pre_increment' => true,
+        'protected_to_private' => true,
+        'return_type_declaration' => true,
+        'self_accessor' => true,
+        'semicolon_after_instruction' => true,
+        'short_scalar_cast' => true,
+        'single_blank_line_at_eof' => true,
+        'single_blank_line_before_namespace' => false,
+        'single_class_element_per_statement' => true,
+        'single_import_per_statement' => true,
+        'single_line_after_imports' => true,
+        'single_quote' => true,
+        'space_after_semicolon' => true,
+        'standardize_not_equals' => true,
+        'strict_param' => false,
+        'switch_case_semicolon_to_colon' => true,
+        'switch_case_space' => true,
+        'ternary_operator_spaces' => true,
+        'ternary_to_null_coalescing' => false,
+        'trailing_comma_in_multiline_array' => true,
+        'trim_array_spaces' => true,
+        'unary_operator_spaces' => true,
+        'visibility_required' => true,
+        'whitespace_after_comma_in_array' => true,
+    ))
+    ->setFinder($finder)
+;
diff --git a/phpcs.xml.dist b/phpcs.xml.dist
index 59b947b..7814331 100644
--- a/phpcs.xml.dist
+++ b/phpcs.xml.dist
@@ -4,6 +4,7 @@
 
     <!-- display progress -->
     <arg value="p"/>
+    <arg name="report" value="full"/>
     <arg name="colors"/>
 
     <!-- coding standard -->
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 43838b6..19fe6c3 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -1,17 +1,33 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <phpunit bootstrap="vendor/autoload.php"
-    backupGlobals="false"
-    backupStaticAttributes="false"
-    colors="true"
-    verbose="true"
-    convertErrorsToExceptions="true"
-    convertNoticesToExceptions="true"
-    convertWarningsToExceptions="true"
-    processIsolation="false"
-    stopOnFailure="false">
-	<testsuites>
-		<testsuite name="All tests">
-			<directory>tests</directory>
-		</testsuite>
-	</testsuites>
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:noNamespaceSchemaLocation="vendor/phpunit/phpunit/phpunit.xsd"
+         backupGlobals="false"
+         backupStaticAttributes="false"
+         beStrictAboutOutputDuringTests="true"
+         beStrictAboutTestsThatDoNotTestAnything="true"
+         beStrictAboutTodoAnnotatedTests="true"
+         colors="true"
+         verbose="true"
+         convertErrorsToExceptions="true"
+         convertNoticesToExceptions="true"
+         convertWarningsToExceptions="true"
+         processIsolation="false"
+         stopOnFailure="false"
+         failOnWarning="true">
+    <testsuites>
+        <testsuite name="TrailingSlash test suite">
+            <directory>tests</directory>
+        </testsuite>
+    </testsuites>
+
+    <filter>
+        <whitelist addUncoveredFilesFromWhitelist="true" processUncoveredFilesFromWhitelist="true">
+            <directory>./src</directory>
+            <exclude>
+                <directory>./tests</directory>
+                <directory>./vendor</directory>
+            </exclude>
+        </whitelist>
+    </filter>
 </phpunit>