diff --git a/tests/unit/registry.bats b/tests/unit/registry.bats
index dbb3ca1fa..403e68f9d 100644
--- a/tests/unit/registry.bats
+++ b/tests/unit/registry.bats
@@ -5,7 +5,7 @@ load test_helper
 setup() {
   global_setup
   create_app
-  dokku checks:set $TEST_APP wait-to-retire=30
+  dokku checks:set $TEST_APP wait-to-retire 30
 }
 
 teardown() {