diff --git a/.github/workflows/system_test.yml b/.github/workflows/system_test.yml
index c8390a9b8..be6735279 100644
--- a/.github/workflows/system_test.yml
+++ b/.github/workflows/system_test.yml
@@ -43,7 +43,7 @@ jobs:
         include:
           - name: 'Hamiltonian (ZDD)'
             exec: adiar_hamiltonian_zdd
-            N: '1 2 3 4 5 6 7 8'
+            N: '1 2 3 4 5 6 7'
 
           - name: 'Queens (BDD)'
             exec: adiar_queens_bdd