diff --git a/OpenSSL/test/util.py b/OpenSSL/test/util.py
index 4b044b7..073aa6c 100644
--- a/OpenSSL/test/util.py
+++ b/OpenSSL/test/util.py
@@ -20,12 +20,7 @@
 from OpenSSL.crypto import Error
 
 
-try:
-    import memdbg
-except Exception:
-    class _memdbg(object):
-        heap = None
-    memdbg = _memdbg()
+import memdbg
 
 from OpenSSL._util import ffi, lib, byte_string as b