diff -r 8c692a6b5ad1 -r 801ccd8e67c0 mercurial/testing/storage.py
--- a/mercurial/testing/storage.py	Thu Sep 06 02:36:25 2018 -0400
+++ b/mercurial/testing/storage.py	Wed Oct 03 10:57:35 2018 -0700
@@ -881,13 +881,14 @@
         with self.assertRaises(error.StorageError):
             f.revision(node1)
 
-        # revision(raw=True) still verifies hashes.
-        # TODO this is buggy because of cache interaction.
-        self.assertEqual(f.revision(node1, raw=True), fulltext1)
+        # raw=True still verifies because there are no special storage
+        # settings.
+        with self.assertRaises(error.StorageError):
+            f.revision(node1, raw=True)
 
         # read() behaves like revision().
-        # TODO this is buggy because of cache interaction.
-        f.read(node1)
+        with self.assertRaises(error.StorageError):
+            f.read(node1)
 
         # We can't test renamed() here because some backends may not require
         # reading/validating the fulltext to return rename metadata.
@@ -931,8 +932,8 @@
         with self.assertRaises(error.StorageError):
             f.read(node1)
 
-        # TODO this should raise error.StorageError.
-        f.read(node1)
+        with self.assertRaises(error.StorageError):
+            f.read(node1)
 
     def testbadnodedelta(self):
         f = self._makefilefn()
@@ -986,7 +987,8 @@
         with self.assertRaises(error.CensoredNodeError):
             f.revision(1)
 
-        self.assertEqual(f.revision(1, raw=True), stored1)
+        with self.assertRaises(error.CensoredNodeError):
+            f.revision(1, raw=True)
 
         with self.assertRaises(error.CensoredNodeError):
             f.read(1)