diff --git a/benchmarks/basic_commands.py b/benchmarks/basic_commands.py
index b5a7fbf8f115f697231a936b7644b41780c51441_YmVuY2htYXJrcy9iYXNpY19jb21tYW5kcy5weQ==..ac72601895e7d4ca494539644b19184c812b2c82_YmVuY2htYXJrcy9iYXNpY19jb21tYW5kcy5weQ== 100644
--- a/benchmarks/basic_commands.py
+++ b/benchmarks/basic_commands.py
@@ -238,6 +238,17 @@
     def time_update(self, repo, **kwargs):
         self.hg("up", "-r", "null")
 
+class Rev1UpdateTimeTestSuite(BaseUpdateTimeTestSuite):
+
+    update_source_rev = "tip~1"
+
+    timeout = 500
+
+    @benchmark_name('simple_command.write.update.rev1anc.time_bench')
+    @params_as_kwargs
+    def time_update(self, repo, **kwargs):
+        self.hg("up", "-r", "tip")
+
 # class TimeTestSuite(BaseTestSuite):
 # 
 #     def time_emptystatus(self, *args, **kwargs):