diff --git a/test/optional_test.cpp b/test/optional_test.cpp
index db89c68..80beb41 100644
--- a/test/optional_test.cpp
+++ b/test/optional_test.cpp
@@ -450,7 +450,7 @@ void test_throwing_val_assign_on_initialized( T const* )
   {
     // This should:
     //   Attempt to assign 'a' and throw.
-    //   opt is kept initialized but its value not neccesarily fully assigned
+    //   opt is kept initialized but its value not necessarily fully assigned
     //   (in this test, incompletely assigned is flagged with the value -1 being set)
     set_pending_assign( ARG(T) ) ;
     opt.reset ( a ) ;
@@ -575,7 +575,7 @@ void test_throwing_assign_to_initialized( T const* )
   {
     // This should:
     //   Attempt to copy construct 'opt1.value()' into opt0 and throw.
-    //   opt0 is kept initialized but its value not neccesarily fully assigned
+    //   opt0 is kept initialized but its value not necessarily fully assigned
     //   (in this test, incompletely assigned is flagged with the value -1 being set)
     set_pending_assign( ARG(T) ) ;
     opt0 = opt1 ;