--- a/runtime/doc/usr_41.txt
+++ b/runtime/doc/usr_41.txt
@@ -890,6 +890,8 @@
 
 Testing:				    *test-functions*
 	assert_equal()       	assert that two expressions values are equal
+	assert_exception()	assert that a command throws an exception
+	assert_fails()		assert that a function call fails
 	assert_false()		assert that an expression is false
 	assert_true()		assert that an expression is true