Fix #10256 - resource warning
diff --git a/Lib/test/test_pkgimport.py b/Lib/test/test_pkgimport.py
index eab66fb..c37e936 100644
--- a/Lib/test/test_pkgimport.py
+++ b/Lib/test/test_pkgimport.py
@@ -29,7 +29,7 @@
         self.package_dir = os.path.join(self.test_dir,
                                         self.package_name)
         os.mkdir(self.package_dir)
-        open(os.path.join(self.package_dir, '__init__.py'), 'w')
+        open(os.path.join(self.package_dir, '__init__.py'), 'w').close()
         self.module_path = os.path.join(self.package_dir, 'foo.py')
 
     def tearDown(self):