diff --git a/Lib/packaging/tests/test_command_install_dist.py b/Lib/packaging/tests/test_command_install_dist.py
index 61270af..8f90aff 100644
--- a/Lib/packaging/tests/test_command_install_dist.py
+++ b/Lib/packaging/tests/test_command_install_dist.py
@@ -18,9 +18,8 @@
 
 
 def _make_ext_name(modname):
-    if os.name == 'nt':
-        if sys.executable.endswith('_d.exe'):
-            modname += '_d'
+    if os.name == 'nt' and sys.executable.endswith('_d.exe'):
+        modname += '_d'
     return modname + get_config_var('SO')