diff --git a/src/Executor/ReferenceExecutor.php b/src/Executor/ReferenceExecutor.php
index 235cd49..837628a 100644
--- a/src/Executor/ReferenceExecutor.php
+++ b/src/Executor/ReferenceExecutor.php
@@ -1043,7 +1043,7 @@ class ReferenceExecutor implements ExecutorImplementation
         if ($abstractType instanceof InterfaceType && $info->schema->getConfig()->typeLoader) {
             Warning::warnOnce(
                 sprintf(
-                    'GraphQL Interface Type `%s` returned `null` from it`s `resolveType` function ' .
+                    'GraphQL Interface Type `%s` returned `null` from its `resolveType` function ' .
                     'for value: %s. Switching to slow resolution method using `isTypeOf` ' .
                     'of all possible implementations. It requires full schema scan and degrades query performance significantly. ' .
                     ' Make sure your `resolveType` always returns valid implementation or throws.',
diff --git a/src/Experimental/Executor/CoroutineExecutor.php b/src/Experimental/Executor/CoroutineExecutor.php
index 45503eb..b473c56 100644
--- a/src/Experimental/Executor/CoroutineExecutor.php
+++ b/src/Experimental/Executor/CoroutineExecutor.php
@@ -900,7 +900,7 @@ class CoroutineExecutor implements Runtime, ExecutorImplementation
         if ($abstractType instanceof InterfaceType && $this->schema->getConfig()->typeLoader) {
             Warning::warnOnce(
                 sprintf(
-                    'GraphQL Interface Type `%s` returned `null` from it`s `resolveType` function ' .
+                    'GraphQL Interface Type `%s` returned `null` from its `resolveType` function ' .
                     'for value: %s. Switching to slow resolution method using `isTypeOf` ' .
                     'of all possible implementations. It requires full schema scan and degrades query performance significantly. ' .
                     ' Make sure your `resolveType` always returns valid implementation or throws.',
diff --git a/tests/Executor/ExecutorLazySchemaTest.php b/tests/Executor/ExecutorLazySchemaTest.php
index 7779715..245b95d 100644
--- a/tests/Executor/ExecutorLazySchemaTest.php
+++ b/tests/Executor/ExecutorLazySchemaTest.php
@@ -154,7 +154,7 @@ class ExecutorLazySchemaTest extends TestCase
         self::assertInstanceOf(Error::class, $result->errors[0]->getPrevious());
 
         self::assertEquals(
-            'GraphQL Interface Type `Pet` returned `null` from it`s `resolveType` function for value: instance of ' .
+            'GraphQL Interface Type `Pet` returned `null` from its `resolveType` function for value: instance of ' .
             'GraphQL\Tests\Executor\TestClasses\Dog. Switching to slow resolution method using `isTypeOf` of all possible ' .
             'implementations. It requires full schema scan and degrades query performance significantly.  ' .
             'Make sure your `resolveType` always returns valid implementation or throws.',