diff --git a/tests/test_main.py b/tests/test_main.py
index 83f04f80..73747405 100644
--- a/tests/test_main.py
+++ b/tests/test_main.py
@@ -360,5 +360,4 @@ def test_packages_distributions_all_module_types(self):
         # All keys return from packages_distributions() should be valid
         # import names, which means that they must _at least_ be valid
         # identifiers:
-        for import_name in distributions.keys():
-            assert import_name.isidentifier(), import_name
+        assert all(import_name.isidentifier() for import_name in distributions.keys())