diff --git a/Lib/packaging/tests/test_command_install_distinfo.py b/Lib/packaging/tests/test_command_install_distinfo.py
index 6d40f66d92a..ade191c57a0 100644
--- a/Lib/packaging/tests/test_command_install_distinfo.py
+++ b/Lib/packaging/tests/test_command_install_distinfo.py
@@ -162,7 +162,7 @@ class InstallDistinfoTestCase(support.TempdirManager,
 
         expected = []
         for f in install.get_outputs():
-            if (f.endswith('.pyc') or f == os.path.join(
+            if (f.endswith(('.pyc', '.pyo')) or f == os.path.join(
                 install_dir, 'foo-1.0.dist-info', 'RECORD')):
                 expected.append([f, '', ''])
             else: