diff --git a/common/prefs_unittest.cc b/common/prefs_unittest.cc
index cb6fc70..3f29319 100644
--- a/common/prefs_unittest.cc
+++ b/common/prefs_unittest.cc
@@ -358,7 +358,7 @@
 
   EXPECT_TRUE(prefs_.Delete(kKey));
   EXPECT_FALSE(prefs_.Exists(kKey));
-  EXPECT_FALSE(prefs_.Delete(kKey));
+  EXPECT_TRUE(prefs_.Delete(kKey));
 }
 
 }  // namespace chromeos_update_engine