test_expect_success \
        "overriding author from command line" \
        "echo 'gak' >file && \
-        git commit -m 'author' --author 'Rubber Duck <rduck@convoy.org>' -a"
+        git commit -m 'author' --author 'Rubber Duck <rduck@convoy.org>' -a >output 2>&1"
+
+test_expect_success \
+       "commit --author output mentions author" \
+       "grep Rubber.Duck output"
 
 test_expect_success PERL \
        "interactive add" \
 
 '
 
+test_expect_success 'amend commit to fix date' '
+
+       test_tick &&
+       newtick=$GIT_AUTHOR_DATE &&
+       git reset --hard &&
+       git cat-file -p HEAD |
+       sed -e "s/author.*/author $author $newtick/" \
+               -e "s/^\(committer.*> \).*$/\1$GIT_COMMITTER_DATE/" > \
+               expected &&
+       git commit --amend --date="$newtick" &&
+       git cat-file -p HEAD > current &&
+       test_cmp expected current
+
+'
+
 test_expect_success 'sign off (1)' '
 
        echo 1 >positive &&