diff --git a/tests/Executor/ExecutorTest.php b/tests/Executor/ExecutorTest.php
index f462c15..64b6eb7 100644
--- a/tests/Executor/ExecutorTest.php
+++ b/tests/Executor/ExecutorTest.php
@@ -329,7 +329,7 @@ class ExecutorTest extends TestCase
                 'fields' => [
                     'a' => [
                         'type'    => Type::string(),
-                        'resolve' => function ($context) use ($doc, &$gotHere) {
+                        'resolve' => function ($context) use (&$gotHere) {
                             $this->assertEquals('thing', $context['contextThing']);
                             $gotHere = true;
                         },
diff --git a/tests/Language/ParserTest.php b/tests/Language/ParserTest.php
index 360e5a1..49f461a 100644
--- a/tests/Language/ParserTest.php
+++ b/tests/Language/ParserTest.php
@@ -331,7 +331,7 @@ GRAPHQL
 ');
         $result = Parser::parse($source);
 
-        $loc = function ($start, $end) use ($source) {
+        $loc = function ($start, $end) {
             return [
                 'start' => $start,
                 'end'   => $end,
@@ -442,7 +442,7 @@ GRAPHQL
 ');
         $result = Parser::parse($source);
 
-        $loc = function ($start, $end) use ($source) {
+        $loc = function ($start, $end) {
             return [
                 'start' => $start,
                 'end'   => $end,
diff --git a/tests/Language/VisitorTest.php b/tests/Language/VisitorTest.php
index b3c81f7..5c62397 100644
--- a/tests/Language/VisitorTest.php
+++ b/tests/Language/VisitorTest.php
@@ -1222,7 +1222,7 @@ class VisitorTest extends ValidatorTestCase
             $ast,
             Visitor::visitInParallel([
                 [
-                    'enter' => function ($node) use (&$visited, $ast) {
+                    'enter' => function ($node) use ($ast) {
                         $this->checkVisitorFnArgs($ast, func_get_args());
                         if ($node->kind === 'Field' && isset($node->name->value) && $node->name->value === 'b') {
                             return Visitor::removeNode();
@@ -1292,7 +1292,7 @@ class VisitorTest extends ValidatorTestCase
             $ast,
             Visitor::visitInParallel([
                 [
-                    'leave' => function ($node) use (&$visited, $ast) {
+                    'leave' => function ($node) use ($ast) {
                         $this->checkVisitorFnArgs($ast, func_get_args(), true);
                         if ($node->kind === 'Field' && isset($node->name->value) && $node->name->value === 'b') {
                             return Visitor::removeNode();
diff --git a/tests/Server/QueryExecutionTest.php b/tests/Server/QueryExecutionTest.php
index b6fc44e..3cba697 100644
--- a/tests/Server/QueryExecutionTest.php
+++ b/tests/Server/QueryExecutionTest.php
@@ -202,7 +202,7 @@ class QueryExecutionTest extends ServerTestCase
         $called1 = false;
         $called2 = false;
 
-        $this->config->setValidationRules(function (OperationParams $params) use ($q1, $q2, &$called1, &$called2) {
+        $this->config->setValidationRules(function (OperationParams $params) use ($q1, &$called1, &$called2) {
             if ($params->query === $q1) {
                 $called1 = true;
 
@@ -376,7 +376,7 @@ class QueryExecutionTest extends ServerTestCase
             'Persistent query loader must return query string or instance of GraphQL\Language\AST\DocumentNode ' .
             'but got: {"err":"err"}'
         );
-        $this->config->setPersistentQueryLoader(function ($queryId, OperationParams $params) use (&$called) {
+        $this->config->setPersistentQueryLoader(function () {
             return ['err' => 'err'];
         });
         $this->executePersistedQuery('some-id');
diff --git a/tests/Type/EnumTypeTest.php b/tests/Type/EnumTypeTest.php
index 55e508d..8445d60 100644
--- a/tests/Type/EnumTypeTest.php
+++ b/tests/Type/EnumTypeTest.php
@@ -132,7 +132,7 @@ class EnumTypeTest extends TestCase
                             'type' => Type::boolean(),
                         ],
                     ],
-                    'resolve' => function ($value, $args) use ($Complex1, $Complex2) {
+                    'resolve' => function ($value, $args) use ($Complex2) {
                         if (! empty($args['provideGoodValue'])) {
                             // Note: this is one of the references of the internal values which
                             // ComplexEnum allows.
diff --git a/tests/Type/ValidationTest.php b/tests/Type/ValidationTest.php
index b96f46d..362574b 100644
--- a/tests/Type/ValidationTest.php
+++ b/tests/Type/ValidationTest.php
@@ -1974,7 +1974,7 @@ class ValidationTest extends TestCase
     public function testRejectsDifferentInstancesOfTheSameType() : void
     {
         // Invalid: always creates new instance vs returning one from registry
-        $typeLoader = function ($name) use (&$typeLoader) {
+        $typeLoader = function ($name) {
             switch ($name) {
                 case 'Query':
                     return new ObjectType([