diff --git a/lib/quarantine/error.rb b/lib/quarantine/error.rb
index e1ea0b8..43cf1a0 100644
--- a/lib/quarantine/error.rb
+++ b/lib/quarantine/error.rb
@@ -3,13 +3,13 @@
 class Quarantine
   class Error < StandardError; end
 
-  # Raised when a database error has occured
+  # Raised when a database error has occurred
   # TODO(ezhu): expand error messages to cover more specific error messages
   class DatabaseError < Error; end
 
   # Raised when quarantine does not know how to upload a specific test
   class UnknownUploadError < Error; end
 
-  # Quarantine does not work with the specificed database
+  # Quarantine does not work with the specified database
   class UnsupportedDatabaseError < Error; end
 end