diff --git a/rules-tests/DeadCode/Rector/ClassMethod/RemoveEmptyClassMethodRector/Fixture/with_interface.php.inc b/rules-tests/DeadCode/Rector/ClassMethod/RemoveEmptyClassMethodRector/Fixture/with_interface.php.inc
index 890def08d1f..3cca3a9297a 100644
--- a/rules-tests/DeadCode/Rector/ClassMethod/RemoveEmptyClassMethodRector/Fixture/with_interface.php.inc
+++ b/rules-tests/DeadCode/Rector/ClassMethod/RemoveEmptyClassMethodRector/Fixture/with_interface.php.inc
@@ -1,7 +1,11 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Rector\Tests\DeadCode\Rector\ClassMethod\RemoveEmptyClassMethodRector\Fixture;
 
+use Rector\Tests\DeadCode\Rector\ClassMethod\RemoveEmptyClassMethodRector\Source\ImplementedInterface;
+
 final class WithInterface implements ImplementedInterface
 {
     public function trample()
@@ -13,17 +17,16 @@ final class WithInterface implements ImplementedInterface
     }
 }
 
-interface ImplementedInterface
-{
-    public function go();
-}
-
 ?>
 -----
 <?php
 
+declare(strict_types=1);
+
 namespace Rector\Tests\DeadCode\Rector\ClassMethod\RemoveEmptyClassMethodRector\Fixture;
 
+use Rector\Tests\DeadCode\Rector\ClassMethod\RemoveEmptyClassMethodRector\Source\ImplementedInterface;
+
 final class WithInterface implements ImplementedInterface
 {
     public function go()
@@ -31,9 +34,4 @@ final class WithInterface implements ImplementedInterface
     }
 }
 
-interface ImplementedInterface
-{
-    public function go();
-}
-
 ?>
diff --git a/rules-tests/DeadCode/Rector/ClassMethod/RemoveEmptyClassMethodRector/Source/ImplementedInterface.php b/rules-tests/DeadCode/Rector/ClassMethod/RemoveEmptyClassMethodRector/Source/ImplementedInterface.php
new file mode 100644
index 00000000000..ff8ab30204a
--- /dev/null
+++ b/rules-tests/DeadCode/Rector/ClassMethod/RemoveEmptyClassMethodRector/Source/ImplementedInterface.php
@@ -0,0 +1,10 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\Tests\DeadCode\Rector\ClassMethod\RemoveEmptyClassMethodRector\Source;
+
+interface ImplementedInterface
+{
+    public function go();
+}