diff --git a/composer.lock b/composer.lock
index d8b8390..2fc38a8 100644
--- a/composer.lock
+++ b/composer.lock
@@ -88,16 +88,16 @@
         },
         {
             "name": "symfony/polyfill-intl-idn",
-            "version": "v1.20.0",
+            "version": "v1.22.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-intl-idn.git",
-                "reference": "3b75acd829741c768bc8b1f84eb33265e7cc5117"
+                "reference": "0eb8293dbbcd6ef6bf81404c9ce7d95bcdf34f44"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-intl-idn/zipball/3b75acd829741c768bc8b1f84eb33265e7cc5117",
-                "reference": "3b75acd829741c768bc8b1f84eb33265e7cc5117",
+                "url": "https://api.github.com/repos/symfony/polyfill-intl-idn/zipball/0eb8293dbbcd6ef6bf81404c9ce7d95bcdf34f44",
+                "reference": "0eb8293dbbcd6ef6bf81404c9ce7d95bcdf34f44",
                 "shasum": ""
             },
             "require": {
@@ -111,7 +111,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-main": "1.20-dev"
+                    "dev-main": "1.22-dev"
                 },
                 "thanks": {
                     "name": "symfony/polyfill",
@@ -155,7 +155,7 @@
                 "shim"
             ],
             "support": {
-                "source": "https://github.com/symfony/polyfill-intl-idn/tree/v1.20.0"
+                "source": "https://github.com/symfony/polyfill-intl-idn/tree/v1.22.0"
             },
             "funding": [
                 {
@@ -171,20 +171,20 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2020-10-23T14:02:19+00:00"
+            "time": "2021-01-07T16:49:33+00:00"
         },
         {
             "name": "symfony/polyfill-intl-normalizer",
-            "version": "v1.20.0",
+            "version": "v1.22.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-intl-normalizer.git",
-                "reference": "727d1096295d807c309fb01a851577302394c897"
+                "reference": "6e971c891537eb617a00bb07a43d182a6915faba"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-intl-normalizer/zipball/727d1096295d807c309fb01a851577302394c897",
-                "reference": "727d1096295d807c309fb01a851577302394c897",
+                "url": "https://api.github.com/repos/symfony/polyfill-intl-normalizer/zipball/6e971c891537eb617a00bb07a43d182a6915faba",
+                "reference": "6e971c891537eb617a00bb07a43d182a6915faba",
                 "shasum": ""
             },
             "require": {
@@ -196,7 +196,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-main": "1.20-dev"
+                    "dev-main": "1.22-dev"
                 },
                 "thanks": {
                     "name": "symfony/polyfill",
@@ -239,7 +239,7 @@
                 "shim"
             ],
             "support": {
-                "source": "https://github.com/symfony/polyfill-intl-normalizer/tree/v1.20.0"
+                "source": "https://github.com/symfony/polyfill-intl-normalizer/tree/v1.22.0"
             },
             "funding": [
                 {
@@ -255,20 +255,20 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2020-10-23T14:02:19+00:00"
+            "time": "2021-01-07T17:09:11+00:00"
         },
         {
             "name": "symfony/polyfill-php72",
-            "version": "v1.20.0",
+            "version": "v1.22.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-php72.git",
-                "reference": "cede45fcdfabdd6043b3592e83678e42ec69e930"
+                "reference": "cc6e6f9b39fe8075b3dabfbaf5b5f645ae1340c9"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-php72/zipball/cede45fcdfabdd6043b3592e83678e42ec69e930",
-                "reference": "cede45fcdfabdd6043b3592e83678e42ec69e930",
+                "url": "https://api.github.com/repos/symfony/polyfill-php72/zipball/cc6e6f9b39fe8075b3dabfbaf5b5f645ae1340c9",
+                "reference": "cc6e6f9b39fe8075b3dabfbaf5b5f645ae1340c9",
                 "shasum": ""
             },
             "require": {
@@ -277,7 +277,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-main": "1.20-dev"
+                    "dev-main": "1.22-dev"
                 },
                 "thanks": {
                     "name": "symfony/polyfill",
@@ -315,7 +315,7 @@
                 "shim"
             ],
             "support": {
-                "source": "https://github.com/symfony/polyfill-php72/tree/v1.20.0"
+                "source": "https://github.com/symfony/polyfill-php72/tree/v1.22.0"
             },
             "funding": [
                 {
@@ -331,22 +331,22 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2020-10-23T14:02:19+00:00"
+            "time": "2021-01-07T16:49:33+00:00"
         }
     ],
     "packages-dev": [
         {
             "name": "amphp/amp",
-            "version": "v2.5.1",
+            "version": "v2.5.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/amphp/amp.git",
-                "reference": "ecdc3c476b3ccff02f8e5d5bcc04f7ccfd18751c"
+                "reference": "efca2b32a7580087adb8aabbff6be1dc1bb924a9"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/amphp/amp/zipball/ecdc3c476b3ccff02f8e5d5bcc04f7ccfd18751c",
-                "reference": "ecdc3c476b3ccff02f8e5d5bcc04f7ccfd18751c",
+                "url": "https://api.github.com/repos/amphp/amp/zipball/efca2b32a7580087adb8aabbff6be1dc1bb924a9",
+                "reference": "efca2b32a7580087adb8aabbff6be1dc1bb924a9",
                 "shasum": ""
             },
             "require": {
@@ -414,7 +414,7 @@
             "support": {
                 "irc": "irc://irc.freenode.org/amphp",
                 "issues": "https://github.com/amphp/amp/issues",
-                "source": "https://github.com/amphp/amp/tree/v2.5.1"
+                "source": "https://github.com/amphp/amp/tree/v2.5.2"
             },
             "funding": [
                 {
@@ -422,7 +422,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2020-11-03T16:23:45+00:00"
+            "time": "2021-01-10T17:06:37+00:00"
         },
         {
             "name": "amphp/byte-stream",
@@ -820,25 +820,25 @@
         },
         {
             "name": "felixfbecker/advanced-json-rpc",
-            "version": "v3.1.1",
+            "version": "v3.2.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/felixfbecker/php-advanced-json-rpc.git",
-                "reference": "0ed363f8de17d284d479ec813c9ad3f6834b5c40"
+                "reference": "06f0b06043c7438959dbdeed8bb3f699a19be22e"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/felixfbecker/php-advanced-json-rpc/zipball/0ed363f8de17d284d479ec813c9ad3f6834b5c40",
-                "reference": "0ed363f8de17d284d479ec813c9ad3f6834b5c40",
+                "url": "https://api.github.com/repos/felixfbecker/php-advanced-json-rpc/zipball/06f0b06043c7438959dbdeed8bb3f699a19be22e",
+                "reference": "06f0b06043c7438959dbdeed8bb3f699a19be22e",
                 "shasum": ""
             },
             "require": {
                 "netresearch/jsonmapper": "^1.0 || ^2.0",
-                "php": ">=7.0",
-                "phpdocumentor/reflection-docblock": "^4.0.0 || ^5.0.0"
+                "php": "^7.1 || ^8.0",
+                "phpdocumentor/reflection-docblock": "^4.3.4 || ^5.0.0"
             },
             "require-dev": {
-                "phpunit/phpunit": "^6.0.0"
+                "phpunit/phpunit": "^7.0 || ^8.0"
             },
             "type": "library",
             "autoload": {
@@ -859,9 +859,9 @@
             "description": "A more advanced JSONRPC implementation",
             "support": {
                 "issues": "https://github.com/felixfbecker/php-advanced-json-rpc/issues",
-                "source": "https://github.com/felixfbecker/php-advanced-json-rpc/tree/master"
+                "source": "https://github.com/felixfbecker/php-advanced-json-rpc/tree/v3.2.0"
             },
-            "time": "2020-03-11T15:21:41+00:00"
+            "time": "2021-01-10T17:48:47+00:00"
         },
         {
             "name": "felixfbecker/language-server-protocol",
@@ -2087,16 +2087,16 @@
         },
         {
             "name": "phpunit/phpunit",
-            "version": "8.5.13",
+            "version": "8.5.14",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/phpunit.git",
-                "reference": "8e86be391a58104ef86037ba8a846524528d784e"
+                "reference": "c25f79895d27b6ecd5abfa63de1606b786a461a3"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/8e86be391a58104ef86037ba8a846524528d784e",
-                "reference": "8e86be391a58104ef86037ba8a846524528d784e",
+                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/c25f79895d27b6ecd5abfa63de1606b786a461a3",
+                "reference": "c25f79895d27b6ecd5abfa63de1606b786a461a3",
                 "shasum": ""
             },
             "require": {
@@ -2168,7 +2168,7 @@
             ],
             "support": {
                 "issues": "https://github.com/sebastianbergmann/phpunit/issues",
-                "source": "https://github.com/sebastianbergmann/phpunit/tree/8.5.13"
+                "source": "https://github.com/sebastianbergmann/phpunit/tree/8.5.14"
             },
             "funding": [
                 {
@@ -2180,7 +2180,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2020-12-01T04:53:52+00:00"
+            "time": "2021-01-17T07:37:30+00:00"
         },
         {
             "name": "psr/container",
@@ -3469,16 +3469,16 @@
         },
         {
             "name": "symfony/polyfill-ctype",
-            "version": "v1.20.0",
+            "version": "v1.22.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-ctype.git",
-                "reference": "f4ba089a5b6366e453971d3aad5fe8e897b37f41"
+                "reference": "c6c942b1ac76c82448322025e084cadc56048b4e"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-ctype/zipball/f4ba089a5b6366e453971d3aad5fe8e897b37f41",
-                "reference": "f4ba089a5b6366e453971d3aad5fe8e897b37f41",
+                "url": "https://api.github.com/repos/symfony/polyfill-ctype/zipball/c6c942b1ac76c82448322025e084cadc56048b4e",
+                "reference": "c6c942b1ac76c82448322025e084cadc56048b4e",
                 "shasum": ""
             },
             "require": {
@@ -3490,7 +3490,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-main": "1.20-dev"
+                    "dev-main": "1.22-dev"
                 },
                 "thanks": {
                     "name": "symfony/polyfill",
@@ -3528,7 +3528,7 @@
                 "portable"
             ],
             "support": {
-                "source": "https://github.com/symfony/polyfill-ctype/tree/v1.20.0"
+                "source": "https://github.com/symfony/polyfill-ctype/tree/v1.22.0"
             },
             "funding": [
                 {
@@ -3544,20 +3544,20 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2020-10-23T14:02:19+00:00"
+            "time": "2021-01-07T16:49:33+00:00"
         },
         {
             "name": "symfony/polyfill-intl-grapheme",
-            "version": "v1.20.0",
+            "version": "v1.22.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-intl-grapheme.git",
-                "reference": "c7cf3f858ec7d70b89559d6e6eb1f7c2517d479c"
+                "reference": "267a9adeb8ecb8071040a740930e077cdfb987af"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-intl-grapheme/zipball/c7cf3f858ec7d70b89559d6e6eb1f7c2517d479c",
-                "reference": "c7cf3f858ec7d70b89559d6e6eb1f7c2517d479c",
+                "url": "https://api.github.com/repos/symfony/polyfill-intl-grapheme/zipball/267a9adeb8ecb8071040a740930e077cdfb987af",
+                "reference": "267a9adeb8ecb8071040a740930e077cdfb987af",
                 "shasum": ""
             },
             "require": {
@@ -3569,7 +3569,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-main": "1.20-dev"
+                    "dev-main": "1.22-dev"
                 },
                 "thanks": {
                     "name": "symfony/polyfill",
@@ -3609,7 +3609,7 @@
                 "shim"
             ],
             "support": {
-                "source": "https://github.com/symfony/polyfill-intl-grapheme/tree/v1.20.0"
+                "source": "https://github.com/symfony/polyfill-intl-grapheme/tree/v1.22.0"
             },
             "funding": [
                 {
@@ -3625,20 +3625,20 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2020-10-23T14:02:19+00:00"
+            "time": "2021-01-07T16:49:33+00:00"
         },
         {
             "name": "symfony/polyfill-mbstring",
-            "version": "v1.20.0",
+            "version": "v1.22.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-mbstring.git",
-                "reference": "39d483bdf39be819deabf04ec872eb0b2410b531"
+                "reference": "f377a3dd1fde44d37b9831d68dc8dea3ffd28e13"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-mbstring/zipball/39d483bdf39be819deabf04ec872eb0b2410b531",
-                "reference": "39d483bdf39be819deabf04ec872eb0b2410b531",
+                "url": "https://api.github.com/repos/symfony/polyfill-mbstring/zipball/f377a3dd1fde44d37b9831d68dc8dea3ffd28e13",
+                "reference": "f377a3dd1fde44d37b9831d68dc8dea3ffd28e13",
                 "shasum": ""
             },
             "require": {
@@ -3650,7 +3650,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-main": "1.20-dev"
+                    "dev-main": "1.22-dev"
                 },
                 "thanks": {
                     "name": "symfony/polyfill",
@@ -3689,7 +3689,7 @@
                 "shim"
             ],
             "support": {
-                "source": "https://github.com/symfony/polyfill-mbstring/tree/v1.20.0"
+                "source": "https://github.com/symfony/polyfill-mbstring/tree/v1.22.0"
             },
             "funding": [
                 {
@@ -3705,20 +3705,20 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2020-10-23T14:02:19+00:00"
+            "time": "2021-01-07T16:49:33+00:00"
         },
         {
             "name": "symfony/polyfill-php73",
-            "version": "v1.20.0",
+            "version": "v1.22.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-php73.git",
-                "reference": "8ff431c517be11c78c48a39a66d37431e26a6bed"
+                "reference": "a678b42e92f86eca04b7fa4c0f6f19d097fb69e2"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-php73/zipball/8ff431c517be11c78c48a39a66d37431e26a6bed",
-                "reference": "8ff431c517be11c78c48a39a66d37431e26a6bed",
+                "url": "https://api.github.com/repos/symfony/polyfill-php73/zipball/a678b42e92f86eca04b7fa4c0f6f19d097fb69e2",
+                "reference": "a678b42e92f86eca04b7fa4c0f6f19d097fb69e2",
                 "shasum": ""
             },
             "require": {
@@ -3727,7 +3727,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-main": "1.20-dev"
+                    "dev-main": "1.22-dev"
                 },
                 "thanks": {
                     "name": "symfony/polyfill",
@@ -3768,7 +3768,7 @@
                 "shim"
             ],
             "support": {
-                "source": "https://github.com/symfony/polyfill-php73/tree/v1.20.0"
+                "source": "https://github.com/symfony/polyfill-php73/tree/v1.22.0"
             },
             "funding": [
                 {
@@ -3784,20 +3784,20 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2020-10-23T14:02:19+00:00"
+            "time": "2021-01-07T16:49:33+00:00"
         },
         {
             "name": "symfony/polyfill-php80",
-            "version": "v1.20.0",
+            "version": "v1.22.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-php80.git",
-                "reference": "e70aa8b064c5b72d3df2abd5ab1e90464ad009de"
+                "reference": "dc3063ba22c2a1fd2f45ed856374d79114998f91"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-php80/zipball/e70aa8b064c5b72d3df2abd5ab1e90464ad009de",
-                "reference": "e70aa8b064c5b72d3df2abd5ab1e90464ad009de",
+                "url": "https://api.github.com/repos/symfony/polyfill-php80/zipball/dc3063ba22c2a1fd2f45ed856374d79114998f91",
+                "reference": "dc3063ba22c2a1fd2f45ed856374d79114998f91",
                 "shasum": ""
             },
             "require": {
@@ -3806,7 +3806,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-main": "1.20-dev"
+                    "dev-main": "1.22-dev"
                 },
                 "thanks": {
                     "name": "symfony/polyfill",
@@ -3851,7 +3851,7 @@
                 "shim"
             ],
             "support": {
-                "source": "https://github.com/symfony/polyfill-php80/tree/v1.20.0"
+                "source": "https://github.com/symfony/polyfill-php80/tree/v1.22.0"
             },
             "funding": [
                 {
@@ -3867,7 +3867,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2020-10-23T14:02:19+00:00"
+            "time": "2021-01-07T16:49:33+00:00"
         },
         {
             "name": "symfony/service-contracts",
@@ -4220,16 +4220,16 @@
         },
         {
             "name": "vimeo/psalm",
-            "version": "4.3.1",
+            "version": "4.4.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/vimeo/psalm.git",
-                "reference": "2feba22a005a18bf31d4c7b9bdb9252c73897476"
+                "reference": "9fd7a7d885b3a216cff8dec9d8c21a132f275224"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/vimeo/psalm/zipball/2feba22a005a18bf31d4c7b9bdb9252c73897476",
-                "reference": "2feba22a005a18bf31d4c7b9bdb9252c73897476",
+                "url": "https://api.github.com/repos/vimeo/psalm/zipball/9fd7a7d885b3a216cff8dec9d8c21a132f275224",
+                "reference": "9fd7a7d885b3a216cff8dec9d8c21a132f275224",
                 "shasum": ""
             },
             "require": {
@@ -4261,15 +4261,14 @@
             "require-dev": {
                 "amphp/amp": "^2.4.2",
                 "bamarni/composer-bin-plugin": "^1.2",
-                "brianium/paratest": "^4.0.0",
+                "brianium/paratest": "^4.0||^6.0",
                 "ext-curl": "*",
-                "php": "^7.3|^8",
                 "phpdocumentor/reflection-docblock": "^5",
-                "phpmyadmin/sql-parser": "5.1.0",
+                "phpmyadmin/sql-parser": "5.1.0||dev-master",
                 "phpspec/prophecy": ">=1.9.0",
                 "phpunit/phpunit": "^9.0",
                 "psalm/plugin-phpunit": "^0.13",
-                "slevomat/coding-standard": "^5.0",
+                "slevomat/coding-standard": "^6.3.11",
                 "squizlabs/php_codesniffer": "^3.5",
                 "symfony/process": "^4.3",
                 "weirdan/prophecy-shim": "^1.0 || ^2.0"
@@ -4319,9 +4318,9 @@
             ],
             "support": {
                 "issues": "https://github.com/vimeo/psalm/issues",
-                "source": "https://github.com/vimeo/psalm/tree/4.3.1"
+                "source": "https://github.com/vimeo/psalm/tree/4.4.1"
             },
-            "time": "2020-12-03T16:44:10+00:00"
+            "time": "2021-01-14T21:44:29+00:00"
         },
         {
             "name": "webmozart/assert",
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index fea68f4..b3f0a30 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -20,6 +20,9 @@
 <filter>
   <whitelist>
     <directory>./src/</directory>
+      <exclude>
+        <directory suffix=".php">./src/Result/Reason</directory>
+      </exclude>
   </whitelist>
 </filter>
-</phpunit>
+</phpunit>
\ No newline at end of file
diff --git a/src/EmailValidator.php b/src/EmailValidator.php
index c68481e..5a2e5c8 100644
--- a/src/EmailValidator.php
+++ b/src/EmailValidator.php
@@ -32,7 +32,7 @@ class EmailValidator
      * @param EmailValidation $emailValidation
      * @return bool
      */
-    public function isValid($email, EmailValidation $emailValidation)
+    public function isValid(string $email, EmailValidation $emailValidation)
     {
         $isValid = $emailValidation->isValid($email, $this->lexer);
         $this->warnings = $emailValidation->getWarnings();
diff --git a/tests/EmailValidator/EmailValidatorTest.php b/tests/EmailValidator/EmailValidatorTest.php
index 4a40f75..9141cce 100644
--- a/tests/EmailValidator/EmailValidatorTest.php
+++ b/tests/EmailValidator/EmailValidatorTest.php
@@ -47,5 +47,8 @@ class EmailValidatorTest extends TestCase
         $validation->expects($this->once())->method("getError")->willReturn($invalidEmail);
 
         $this->assertFalse($validator->isValid("example@example.com", $validation));
+        $this->assertEquals(false, $validator->hasWarnings());
+        $this->assertEquals([], $validator->getWarnings());
+        $this->assertEquals($invalidEmail, $validator->getError());
     }
 }
diff --git a/tests/EmailValidator/Reason/MultipleErrorsTest.php b/tests/EmailValidator/Reason/MultipleErrorsTest.php
index bcf68a5..831a3a0 100644
--- a/tests/EmailValidator/Reason/MultipleErrorsTest.php
+++ b/tests/EmailValidator/Reason/MultipleErrorsTest.php
@@ -25,11 +25,14 @@ class MultipleErrorsTests extends TestCase
     {
         $error1 = new DummyReason();
         $error2 = new AnotherDummyReason();
+        $expectedReason = $error1->description() . PHP_EOL . $error2->description() . PHP_EOL;
 
         $multiError = new MultipleErrors();
         $multiError->addReason($error1);
         $multiError->addReason($error2);
 
         $this->assertCount(2, $multiError->getReasons());
+        $this->assertEquals($expectedReason, $multiError->description());
+        $this->assertEquals($error1, $multiError->reason());
     }
 }
\ No newline at end of file