diff --git a/Lib/test/test_imaplib.py b/Lib/test/test_imaplib.py
index 04601da8aaa..98d6de97626 100644
--- a/Lib/test/test_imaplib.py
+++ b/Lib/test/test_imaplib.py
@@ -7,6 +7,6 @@
 
 for t in timevalues:
     t1 = imaplib.Time2Internaldate(t)
-    t2 = imaplib.Time2Internaldate(imaplib.Internaldate2tuple('INTERNALDATE ' + imaplib.Time2Internaldate(t)))
+    t2 = imaplib.Time2Internaldate(imaplib.Internaldate2tuple('INTERNALDATE ' + t1))
     if t1 <> t2:
         print 'incorrect result when converting', `t`