Index: tests/test.py
===================================================================
--- tests/test.py	(revision 0f4ac1051212a2dd05b205e457789712e2c9a66b)
+++ tests/test.py	(revision 70d8e2f21e271a433d073d382ee2a8356bb528cf)
@@ -115,5 +115,5 @@
 	parser.add_argument('--continue', help='When multiple specifications are passed (debug/install/arch), sets whether or not to continue if the last specification failed', type=yes_no, default='yes', dest='continue_')
 	parser.add_argument('--invariant', help='Tell the compiler to check invariants.', action='store_true')
-	parser.add_argument('--no-invariant', help='Tell the compiler not to check invariant.', action='store_false')
+	parser.add_argument('--no-invariant', help='Tell the compiler not to check invariants.', action='store_false')
 	parser.add_argument('--timeout', help='Maximum duration in seconds after a single test is considered to have timed out', type=int, default=180)
 	parser.add_argument('--global-timeout', help='Maximum cumulative duration in seconds after the ALL tests are considered to have timed out', type=int, default=7200)