diff --git a/runbot/tests/test_build.py b/runbot/tests/test_build.py
index d977904c..2e514106 100644
--- a/runbot/tests/test_build.py
+++ b/runbot/tests/test_build.py
@@ -20,7 +20,7 @@ def rev_parse(repo, branch_name):
     return head_hash
 
 
-@tagged('-at_install', 'post_istall')
+@tagged('-at_install', 'post_install')
 class TestBuildParams(RunbotCaseMinimalSetup):
 
     def setUp(self):