diff --git a/Lib/unittest.py b/Lib/unittest.py
index dde27fb..57e45d2 100644
--- a/Lib/unittest.py
+++ b/Lib/unittest.py
@@ -879,7 +879,7 @@
         if self.showAll:
             self.stream.writeln("expected failure")
         elif self.dots:
-            self.stream.write(".")
+            self.stream.write("x")
             self.stream.flush()
 
     def addUnexpectedSuccess(self, test):
@@ -887,7 +887,7 @@
         if self.showAll:
             self.stream.writeln("unexpected success")
         elif self.dots:
-            self.stream.write(".")
+            self.stream.write("u")
             self.stream.flush()
 
     def printErrors(self):