diff --git a/Lib/test/test_functools.py b/Lib/test/test_functools.py
index dadcd04394b390..2a65b2cca5c78e 100644
--- a/Lib/test/test_functools.py
+++ b/Lib/test/test_functools.py
@@ -1313,6 +1313,16 @@ def fib(n):
             self.module._CacheInfo(hits=0, misses=0, maxsize=None, currsize=0))
 
 
+class TestCachePy(TestCache, unittest.TestCase):
+    module = py_functools
+
+
+@unittest.skipUnless(c_functools, 'requires the C _functools module')
+class TestCacheC(TestCache, unittest.TestCase):
+    if c_functools:
+        module = c_functools
+
+
 class TestLRU:
 
     def test_lru(self):