diff --git a/tests/fixtures.py b/tests/fixtures.py
index 6c589b40..7a96dca6 100644
--- a/tests/fixtures.py
+++ b/tests/fixtures.py
@@ -351,6 +351,7 @@ def build_files(file_defs, prefix=pathlib.Path()):
             full_name.mkdir()
             build_files(contents, prefix=full_name)
         else:
+            full_name.parent.mkdir(parents=True, exist_ok=True)
             if isinstance(contents, bytes):
                 with full_name.open('wb') as f:
                     f.write(contents)
diff --git a/tests/test_main.py b/tests/test_main.py
index c7c39094..8225e2d1 100644
--- a/tests/test_main.py
+++ b/tests/test_main.py
@@ -3,6 +3,7 @@
 import unittest
 import importlib
 import importlib_metadata
+import itertools
 import pyfakefs.fake_filesystem_unittest as ffs
 
 from . import fixtures
@@ -338,6 +339,17 @@ def test_packages_distributions_all_module_types(self):
         Test top-level modules detected on a package without 'top-level.txt'.
         """
         suffixes = importlib.machinery.all_suffixes()
+        filenames = list(
+            itertools.chain.from_iterable(
+                [
+                    f'{i}-top-level{suffix}',
+                    f'{i}-in-namespace/mod{suffix}',
+                    f'{i}-in-package/__init__.py',
+                    f'{i}-in-package/mod{suffix}',
+                ]
+                for i, suffix in enumerate(suffixes)
+            )
+        )
         fixtures.build_files(
             {
                 'all_distributions-1.0.0.dist-info': {
@@ -345,17 +357,12 @@ def test_packages_distributions_all_module_types(self):
                         Name: all_distributions
                         Version: 1.0.0
                     """,
-                    'RECORD': ''.join(
-                        f'{i}-top-level{suffix},,\n'
-                        f'{i}-in-namespace/mod{suffix},,\n'
-                        f'{i}-in-package/__init__.py,,\n'
-                        f'{i}-in-package/mod{suffix},,\n'
-                        for i, suffix in enumerate(suffixes)
-                    ),
+                    'RECORD': ''.join(f'{fname},,\n' for fname in filenames),
                 },
             },
             prefix=self.site_dir,
         )
+        fixtures.build_files({fname: "" for fname in filenames}, prefix=self.site_dir)
 
         distributions = packages_distributions()