1 files changed, 14 insertions, 8 deletions
diff --git a/mock/tests/support.py b/mock/tests/support.py
index d57a372..85fd0a3 100644
--- a/mock/tests/support.py
+++ b/mock/tests/support.py
@@ -1,7 +1,6 @@
 import contextlib
 import sys
 
-
 target = {'foo': 'FOO'}
 
 
@@ -29,9 +28,7 @@ def uncache(*names):
 
     """
     for name in names:
-        if name in ('sys', 'marshal', 'imp'):
-            raise ValueError(
-                "cannot uncache {0}".format(name))
+        assert name not in ('sys', 'marshal', 'imp')
         try:
             del sys.modules[name]
         except KeyError:
@@ -40,7 +37,16 @@ def uncache(*names):
         yield
     finally:
         for name in names:
-            try:
-                del sys.modules[name]
-            except KeyError:
-                pass
+            del sys.modules[name]
+
+
+class _ALWAYS_EQ:
+    """
+    Object that is equal to anything.
+    """
+    def __eq__(self, other):
+        return True
+    def __ne__(self, other):
+        return False
+
+ALWAYS_EQ = _ALWAYS_EQ()