diff --git a/tests/check_consistent.py b/tests/check_consistent.py
index ff8f20bcd..001e8caa8 100755
--- a/tests/check_consistent.py
+++ b/tests/check_consistent.py
@@ -99,7 +99,7 @@ def check_same_files():
                 )
 
 
-_VERSIONS_RE = re.compile(r"^([a-zA-Z_][a-zA-Z0-9_]*): [23]\.\d{1,2}-(?:[23]\.\d{1,2})?$")
+_VERSIONS_RE = re.compile(r"^([a-zA-Z_][a-zA-Z0-9_.]*): [23]\.\d{1,2}-(?:[23]\.\d{1,2})?$")
 
 
 def check_versions():
@@ -115,21 +115,29 @@ def check_versions():
         module = m.group(1)
         assert module not in versions, f"Duplicate module {module} in VERSIONS"
         versions.add(module)
-    modules = set()
-    for entry in os.listdir("stdlib"):
-        if entry == "@python2" or entry == "VERSIONS":
-            continue
-        if os.path.isfile(os.path.join("stdlib", entry)):
-            mod, _ = os.path.splitext(entry)
-            modules.add(mod)
-        else:
-            modules.add(entry)
-    extra = modules - versions
+    modules = _find_stdlib_modules()
+    # Sub-modules don't need to be listed in VERSIONS.
+    extra = {m.split(".")[0] for m in modules} - versions
     assert not extra, f"Modules not in versions: {extra}"
     extra = versions - modules
     assert not extra, f"Versions not in modules: {extra}"
 
 
+def _find_stdlib_modules() -> set[str]:
+    modules = set()
+    for path, _, files in os.walk("stdlib"):
+        if "@python2" in path:
+            continue
+        for filename in files:
+            base_module = ".".join(os.path.normpath(path).split(os.sep)[1:])
+            if filename == "__init__.pyi":
+                modules.add(base_module)
+            elif filename.endswith(".pyi"):
+                mod, _ = os.path.splitext(filename)
+                modules.add(f"{base_module}.{mod}" if base_module else mod)
+    return modules
+
+
 def _strip_dep_version(dependency):
     dep_version_pos = len(dependency)
     for pos, c in enumerate(dependency):
diff --git a/tests/mypy_test.py b/tests/mypy_test.py
index 349a61dac..49f6f4323 100755
--- a/tests/mypy_test.py
+++ b/tests/mypy_test.py
@@ -71,7 +71,7 @@ def match(fn, args, exclude_list):
     return True
 
 
-_VERSION_LINE_RE = re.compile(r"^([a-zA-Z_][a-zA-Z0-9_]*): ([23]\.\d{1,2})-([23]\.\d{1,2})?$")
+_VERSION_LINE_RE = re.compile(r"^([a-zA-Z_][a-zA-Z0-9_.]*): ([23]\.\d{1,2})-([23]\.\d{1,2})?$")
 
 
 def parse_versions(fname):