diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index beba1265..be305133 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -11,7 +11,7 @@ jobs:
 
     strategy:
       matrix:
-        php: ['7.1', '7.2', '7.3', '7.4', '8.0', '8.1']
+        php: ['7.1', '7.2', '7.3', '7.4', '8.0']
 
     steps:
       - name: Checkout Code
diff --git a/src/Parser/EntryParser.php b/src/Parser/EntryParser.php
index 64df9a02..5cfa3eef 100644
--- a/src/Parser/EntryParser.php
+++ b/src/Parser/EntryParser.php
@@ -19,6 +19,7 @@ final class EntryParser
     private const ESCAPE_SEQUENCE_STATE = 4;
     private const WHITESPACE_STATE = 5;
     private const COMMENT_STATE = 6;
+    private const REJECT_STATES = [self::SINGLE_QUOTED_STATE, self::DOUBLE_QUOTED_STATE, self::ESCAPE_SEQUENCE_STATE];
 
     /**
      * This class is a singleton.
@@ -156,16 +157,20 @@ private static function parseValue(string $value)
             return Success::create(Value::blank());
         }
 
-        return \array_reduce(\iterator_to_array(Lexer::lex($value)), static function (Result $data, string $token) use ($value) {
-            return $data->flatMap(static function (array $data) use ($token, $value) {
-                return self::processToken($data[1], $token)->mapError(static function (string $err) use ($value) {
-                    return self::getErrorMessage($err, $value);
-                })->map(static function (array $val) use ($data) {
+        return \array_reduce(\iterator_to_array(Lexer::lex($value)), static function (Result $data, string $token) {
+            return $data->flatMap(static function (array $data) use ($token) {
+                return self::processToken($data[1], $token)->map(static function (array $val) use ($data) {
                     return [$data[0]->append($val[0], $val[1]), $val[2]];
                 });
             });
-        }, Success::create([Value::blank(), self::INITIAL_STATE]))->map(static function (array $data) {
-            return $data[0];
+        }, Success::create([Value::blank(), self::INITIAL_STATE]))->flatMap(static function (array $result) {
+            if (in_array($result[1], self::REJECT_STATES, true)) {
+                return Error::create('a missing closing quote');
+            }
+
+            return Success::create($result[0]);
+        })->mapError(static function (string $err) use ($value) {
+            return self::getErrorMessage($err, $value);
         });
     }
 
diff --git a/tests/Dotenv/Parser/EntryParserTest.php b/tests/Dotenv/Parser/EntryParserTest.php
index d3082e44..e61be25e 100644
--- a/tests/Dotenv/Parser/EntryParserTest.php
+++ b/tests/Dotenv/Parser/EntryParserTest.php
@@ -157,6 +157,30 @@ public function testParserEscapingSingle()
         $this->checkPositiveResult($result, 'FOO_BAD', 'iiiiviiiixiiiiviiii\\a');
     }
 
+    public function testParserMissingClosingSingleQuote()
+    {
+        $result = EntryParser::parse('TEST=\'erert');
+        $this->checkErrorResult($result, 'Encountered a missing closing quote at [\'erert].');
+    }
+
+    public function testParserMissingClosingDoubleQuote()
+    {
+        $result = EntryParser::parse('TEST="erert');
+        $this->checkErrorResult($result, 'Encountered a missing closing quote at ["erert].');
+    }
+
+    public function testParserMissingClosingQuotes()
+    {
+        $result = EntryParser::parse("TEST=\"erert\nTEST='erert\n");
+        $this->checkErrorResult($result, 'Encountered a missing closing quote at ["erert].');
+    }
+
+    public function testParserClosingQuoteWithEscape()
+    {
+        $result = EntryParser::parse('TEST="\\');
+        $this->checkErrorResult($result, 'Encountered a missing closing quote at ["\\].');
+    }
+
     /**
      * @param \GrahamCampbell\ResultType\Result<\Dotenv\Parser\Entry,string> $result
      * @param string                                                         $name
diff --git a/tests/Dotenv/Parser/LinesTest.php b/tests/Dotenv/Parser/LinesTest.php
index 57886760..3f0502f5 100644
--- a/tests/Dotenv/Parser/LinesTest.php
+++ b/tests/Dotenv/Parser/LinesTest.php
@@ -62,4 +62,17 @@ public function testProcessClosingSlash()
 
         self::assertSame($expected, $lines);
     }
+
+    public function testProcessBadQuotes()
+    {
+        $lines = [
+            "TEST=\"erert\nTEST='erert\n",
+        ];
+
+        $expected = [
+            "TEST=\"erert\nTEST='erert\n",
+        ];
+
+        self::assertSame($expected, $lines);
+    }
 }