diff --git a/src/Executor/ExecutionContext.php b/src/Executor/ExecutionContext.php
index 3de1a2e..4e541f2 100644
--- a/src/Executor/ExecutionContext.php
+++ b/src/Executor/ExecutionContext.php
@@ -14,7 +14,7 @@ use GraphQL\Type\Schema;
  * Data that must be available at all points during query execution.
  *
  * Namely, schema of the type system that is currently executing,
- * and the fragments defined in the query document
+ * and the fragments defined in the query document.
  *
  * @internal
  */
@@ -45,7 +45,7 @@ class ExecutionContext
     public $errors;
 
     /** @var PromiseAdapter */
-    public $promises;
+    public $promiseAdapter;
 
     public function __construct(
         $schema,
@@ -53,7 +53,7 @@ class ExecutionContext
         $root,
         $contextValue,
         $operation,
-        $variables,
+        $variableValues,
         $errors,
         $fieldResolver,
         $promiseAdapter
@@ -63,10 +63,10 @@ class ExecutionContext
         $this->rootValue      = $root;
         $this->contextValue   = $contextValue;
         $this->operation      = $operation;
-        $this->variableValues = $variables;
+        $this->variableValues = $variableValues;
         $this->errors         = $errors ?: [];
         $this->fieldResolver  = $fieldResolver;
-        $this->promises       = $promiseAdapter;
+        $this->promiseAdapter = $promiseAdapter;
     }
 
     public function addError(Error $error)
diff --git a/src/Executor/ReferenceExecutor.php b/src/Executor/ReferenceExecutor.php
index b7b3351..14bff16 100644
--- a/src/Executor/ReferenceExecutor.php
+++ b/src/Executor/ReferenceExecutor.php
@@ -199,7 +199,7 @@ class ReferenceExecutor implements ExecutorImplementation
     public function doExecute() : Promise
     {
         // Return a Promise that will eventually resolve to the data described by
-        // The "Response" section of the GraphQL specification.
+        // the "Response" section of the GraphQL specification.
         //
         // If errors are encountered while executing a GraphQL field, only that
         // field and its descendants will be omitted, and sibling fields will still
@@ -212,7 +212,7 @@ class ReferenceExecutor implements ExecutorImplementation
         // But for the "sync" case it is always fulfilled
         return $this->isPromise($result)
             ? $result
-            : $this->exeContext->promises->createFulfilled($result);
+            : $this->exeContext->promiseAdapter->createFulfilled($result);
     }
 
     /**
@@ -262,7 +262,7 @@ class ReferenceExecutor implements ExecutorImplementation
                         if ($error instanceof Error) {
                             $this->exeContext->addError($error);
 
-                            return $this->exeContext->promises->createFulfilled(null);
+                            return $this->exeContext->promiseAdapter->createFulfilled(null);
                         }
                     }
                 );
@@ -574,6 +574,7 @@ class ReferenceExecutor implements ExecutorImplementation
 
     /**
      * This method looks up the field on the given type definition.
+     *
      * It has special casing for the two introspection fields, __schema
      * and __typename. __typename is special because it can always be
      * queried as a field, even in situations where no other fields
@@ -608,8 +609,8 @@ class ReferenceExecutor implements ExecutorImplementation
     }
 
     /**
-     * Isolates the "ReturnOrAbrupt" behavior to not de-opt the `resolveField`
-     * function. Returns the result of resolveFn or the abrupt-return Error object.
+     * Isolates the "ReturnOrAbrupt" behavior to not de-opt the `resolveField` function.
+     * Returns the result of resolveFn or the abrupt-return Error object.
      *
      * @param FieldDefinition $fieldDef
      * @param FieldNode       $fieldNode
@@ -623,7 +624,7 @@ class ReferenceExecutor implements ExecutorImplementation
     private function resolveOrError($fieldDef, $fieldNode, $resolveFn, $source, $context, $info)
     {
         try {
-            // Build hash of arguments from the field.arguments AST, using the
+            // Build a map of arguments from the field.arguments AST, using the
             // variables scope to fulfill any variable references.
             $args = Values::getArgumentValues(
                 $fieldDef,
@@ -685,7 +686,7 @@ class ReferenceExecutor implements ExecutorImplementation
                     function ($error) use ($exeContext) {
                         $exeContext->addError($error);
 
-                        return $this->exeContext->promises->createFulfilled(null);
+                        return $this->exeContext->promiseAdapter->createFulfilled(null);
                     }
                 );
             }
@@ -732,7 +733,7 @@ class ReferenceExecutor implements ExecutorImplementation
                 return $promise->then(
                     null,
                     function ($error) use ($fieldNodes, $path) {
-                        return $this->exeContext->promises->createRejected(Error::createLocatedError(
+                        return $this->exeContext->promiseAdapter->createRejected(Error::createLocatedError(
                             $error,
                             $fieldNodes,
                             $path
@@ -864,7 +865,7 @@ class ReferenceExecutor implements ExecutorImplementation
      */
     private function isPromise($value)
     {
-        return $value instanceof Promise || $this->exeContext->promises->isThenable($value);
+        return $value instanceof Promise || $this->exeContext->promiseAdapter->isThenable($value);
     }
 
     /**
@@ -880,12 +881,12 @@ class ReferenceExecutor implements ExecutorImplementation
         if ($value === null || $value instanceof Promise) {
             return $value;
         }
-        if ($this->exeContext->promises->isThenable($value)) {
-            $promise = $this->exeContext->promises->convertThenable($value);
+        if ($this->exeContext->promiseAdapter->isThenable($value)) {
+            $promise = $this->exeContext->promiseAdapter->convertThenable($value);
             if (! $promise instanceof Promise) {
                 throw new InvariantViolation(sprintf(
                     '%s::convertThenable is expected to return instance of GraphQL\Executor\Promise\Promise, got: %s',
-                    get_class($this->exeContext->promises),
+                    get_class($this->exeContext->promiseAdapter),
                     Utils::printSafe($promise)
                 ));
             }
@@ -927,28 +928,27 @@ class ReferenceExecutor implements ExecutorImplementation
     }
 
     /**
-     * Complete a list value by completing each item in the list with the
-     * inner type
+     * Complete a list value by completing each item in the list with the inner type.
      *
-     * @param FieldNode[] $fieldNodes
-     * @param mixed[]     $path
-     * @param mixed       $result
+     * @param FieldNode[]         $fieldNodes
+     * @param mixed[]             $path
+     * @param mixed[]|Traversable $results
      *
      * @return mixed[]|Promise
      *
      * @throws Exception
      */
-    private function completeListValue(ListOfType $returnType, $fieldNodes, ResolveInfo $info, $path, &$result)
+    private function completeListValue(ListOfType $returnType, $fieldNodes, ResolveInfo $info, $path, &$results)
     {
         $itemType = $returnType->getWrappedType();
         Utils::invariant(
-            is_array($result) || $result instanceof Traversable,
+            is_array($results) || $results instanceof Traversable,
             'User Error: expected iterable, but did not find one for field ' . $info->parentType . '.' . $info->fieldName . '.'
         );
         $containsPromise = false;
         $i               = 0;
         $completedItems  = [];
-        foreach ($result as $item) {
+        foreach ($results as $item) {
             $fieldPath     = $path;
             $fieldPath[]   = $i++;
             $info->path    = $fieldPath;
@@ -959,7 +959,9 @@ class ReferenceExecutor implements ExecutorImplementation
             $completedItems[] = $completedItem;
         }
 
-        return $containsPromise ? $this->exeContext->promises->all($completedItems) : $completedItems;
+        return $containsPromise
+            ? $this->exeContext->promiseAdapter->all($completedItems)
+            : $completedItems;
     }
 
     /**
@@ -1101,7 +1103,7 @@ class ReferenceExecutor implements ExecutorImplementation
             }
         }
         if (! empty($promisedIsTypeOfResults)) {
-            return $this->exeContext->promises->all($promisedIsTypeOfResults)
+            return $this->exeContext->promiseAdapter->all($promisedIsTypeOfResults)
                 ->then(static function ($isTypeOfResults) use ($possibleTypes) {
                     foreach ($isTypeOfResults as $index => $result) {
                         if ($result) {
@@ -1187,7 +1189,7 @@ class ReferenceExecutor implements ExecutorImplementation
     /**
      * @param FieldNode[] $fieldNodes
      * @param mixed[]     $path
-     * @param mixed[]     $result
+     * @param mixed       $result
      *
      * @return mixed[]|Promise|stdClass
      *
@@ -1299,7 +1301,7 @@ class ReferenceExecutor implements ExecutorImplementation
     {
         $keys              = array_keys($assoc);
         $valuesAndPromises = array_values($assoc);
-        $promise           = $this->exeContext->promises->all($valuesAndPromises);
+        $promise           = $this->exeContext->promiseAdapter->all($valuesAndPromises);
 
         return $promise->then(static function ($values) use ($keys) {
             $resolvedResults = [];
diff --git a/src/Type/Definition/ResolveInfo.php b/src/Type/Definition/ResolveInfo.php
index 7684e93..d50362f 100644
--- a/src/Type/Definition/ResolveInfo.php
+++ b/src/Type/Definition/ResolveInfo.php
@@ -21,7 +21,7 @@ use function array_merge_recursive;
 class ResolveInfo
 {
     /**
-     * The name of the field being resolved
+     * The name of the field being resolved.
      *
      * @api
      * @var string
@@ -37,7 +37,7 @@ class ResolveInfo
     public $fieldNodes = [];
 
     /**
-     * Expected return type of the field being resolved
+     * Expected return type of the field being resolved.
      *
      * @api
      * @var ScalarType|ObjectType|InterfaceType|UnionType|EnumType|ListOfType|NonNull
@@ -45,7 +45,7 @@ class ResolveInfo
     public $returnType;
 
     /**
-     * Parent type of the field being resolved
+     * Parent type of the field being resolved.
      *
      * @api
      * @var ObjectType
@@ -53,7 +53,7 @@ class ResolveInfo
     public $parentType;
 
     /**
-     * Path to this field from the very root value
+     * Path to this field from the very root value.
      *
      * @api
      * @var string[][]
@@ -61,7 +61,7 @@ class ResolveInfo
     public $path;
 
     /**
-     * Instance of a schema used for execution
+     * Instance of a schema used for execution.
      *
      * @api
      * @var Schema
@@ -69,7 +69,7 @@ class ResolveInfo
     public $schema;
 
     /**
-     * AST of all fragments defined in query
+     * AST of all fragments defined in query.
      *
      * @api
      * @var FragmentDefinitionNode[]
@@ -77,15 +77,15 @@ class ResolveInfo
     public $fragments = [];
 
     /**
-     * Root value passed to query execution
+     * Root value passed to query execution.
      *
      * @api
-     * @var mixed|null
+     * @var mixed
      */
     public $rootValue;
 
     /**
-     * AST of operation definition node (query, mutation)
+     * AST of operation definition node (query, mutation).
      *
      * @api
      * @var OperationDefinitionNode|null
@@ -93,7 +93,7 @@ class ResolveInfo
     public $operation;
 
     /**
-     * Array of variables passed to query execution
+     * Array of variables passed to query execution.
      *
      * @api
      * @var mixed[]
@@ -137,7 +137,7 @@ class ResolveInfo
 
     /**
      * Helper method that returns names of all fields selected in query for
-     * $this->fieldName up to $depth levels
+     * $this->fieldName up to $depth levels.
      *
      * Example:
      * query MyQuery{
diff --git a/src/Utils/MixedStore.php b/src/Utils/MixedStore.php
index 469abaa..8513fd5 100644
--- a/src/Utils/MixedStore.php
+++ b/src/Utils/MixedStore.php
@@ -21,7 +21,7 @@ use function is_string;
  * Similar to PHP array, but allows any type of data to act as key (including arrays, objects, scalars)
  *
  * Note: unfortunately when storing array as key - access and modification is O(N)
- * (yet this should be really rare case and should be avoided when possible)
+ * (yet this should rarely be the case and should be avoided when possible)
  */
 class MixedStore implements ArrayAccess
 {
diff --git a/tests/Executor/DeferredFieldsTest.php b/tests/Executor/DeferredFieldsTest.php
index e68388c..439d117 100644
--- a/tests/Executor/DeferredFieldsTest.php
+++ b/tests/Executor/DeferredFieldsTest.php
@@ -401,7 +401,7 @@ class DeferredFieldsTest extends TestCase
                 return [
                     'sync'         => [
                         'type'    => Type::string(),
-                        'resolve' => function ($v, $a, $c, ResolveInfo $info) {
+                        'resolve' => function ($val, $args, $context, ResolveInfo $info) {
                             $this->paths[] = $info->path;
 
                             return 'sync';
@@ -409,7 +409,7 @@ class DeferredFieldsTest extends TestCase
                     ],
                     'deferred'     => [
                         'type'    => Type::string(),
-                        'resolve' => function ($v, $a, $c, ResolveInfo $info) {
+                        'resolve' => function ($val, $args, $context, ResolveInfo $info) {
                             $this->paths[] = $info->path;
 
                             return new Deferred(function () use ($info) {
@@ -421,7 +421,7 @@ class DeferredFieldsTest extends TestCase
                     ],
                     'nest'         => [
                         'type'    => $complexType,
-                        'resolve' => function ($v, $a, $c, ResolveInfo $info) {
+                        'resolve' => function ($val, $args, $context, ResolveInfo $info) {
                             $this->paths[] = $info->path;
 
                             return [];
@@ -429,7 +429,7 @@ class DeferredFieldsTest extends TestCase
                     ],
                     'deferredNest' => [
                         'type'    => $complexType,
-                        'resolve' => function ($v, $a, $c, ResolveInfo $info) {
+                        'resolve' => function ($val, $args, $context, ResolveInfo $info) {
                             $this->paths[] = $info->path;
 
                             return new Deferred(function () use ($info) {