diff --git a/composer.json b/composer.json
index d779b56..e7ec39e 100644
--- a/composer.json
+++ b/composer.json
@@ -73,5 +73,10 @@
             "@lint",
             "@phpunit"
         ]
+    },
+    "config": {
+        "allow-plugins": {
+            "dealerdirect/phpcodesniffer-composer-installer": true
+        }
     }
 }
diff --git a/src/Matchers/FormDataMatcher.php b/src/Matchers/FormDataMatcher.php
index ebddaa8..14cd2e6 100644
--- a/src/Matchers/FormDataMatcher.php
+++ b/src/Matchers/FormDataMatcher.php
@@ -10,7 +10,7 @@
 namespace Pock\Matchers;
 
 use Pock\Comparator\ComparatorLocator;
-use Pock\Comparator\RecursiveLtrArrayComparator;
+use Pock\Comparator\RecursiveArrayComparator;
 use Pock\Traits\SeekableStreamDataExtractor;
 use Psr\Http\Message\RequestInterface;
 
@@ -35,6 +35,6 @@ class FormDataMatcher extends QueryMatcher
             return false;
         }
 
-        return ComparatorLocator::get(RecursiveLtrArrayComparator::class)->compare($this->query, $query);
+        return ComparatorLocator::get(RecursiveArrayComparator::class)->compare($this->query, $query);
     }
 }
diff --git a/tests/src/Matchers/FormDataMatcherTest.php b/tests/src/Matchers/FormDataMatcherTest.php
index d20e486..ca7bfe9 100644
--- a/tests/src/Matchers/FormDataMatcherTest.php
+++ b/tests/src/Matchers/FormDataMatcherTest.php
@@ -44,11 +44,19 @@ class FormDataMatcherTest extends PockTestCase
         self::assertFalse($matcher->matches($request));
     }
 
-    public function testMatches(): void
+    public function testNoMatchesExtraValues(): void
     {
         $matcher = new FormDataMatcher(['field2' => 'value2']);
         $request = self::getRequestWithBody('field1=value1&field2=value2');
 
+        self::assertFalse($matcher->matches($request));
+    }
+
+    public function testMatches(): void
+    {
+        $matcher = new FormDataMatcher(['field1' => 'value1', 'field2' => 'value2']);
+        $request = self::getRequestWithBody('field1=value1&field2=value2');
+
         self::assertTrue($matcher->matches($request));
     }
 }
diff --git a/tests/src/PockBuilderTest.php b/tests/src/PockBuilderTest.php
index fde2d04..1051749 100644
--- a/tests/src/PockBuilderTest.php
+++ b/tests/src/PockBuilderTest.php
@@ -681,7 +681,7 @@ EOF;
         $builder = new PockBuilder();
         $builder->matchMethod(RequestMethod::GET)
             ->matchUri(self::TEST_URI)
-            ->matchFormData(['field2' => 'value2'])
+            ->matchFormData(['field1' => 'value1', 'field2' => 'value2'])
             ->reply(200);
 
         $response = $builder->getClient()->sendRequest(self::getRequestWithBody('field1=value1&field2=value2'));