diff --git a/tests/guard/state/test_workflow_contract.py b/tests/guard/state/test_workflow_contract.py
index ecd7e26..b463b13 100644
--- a/tests/guard/state/test_workflow_contract.py
+++ b/tests/guard/state/test_workflow_contract.py
@@ -284,10 +284,7 @@ def test_vuln_research_coverage_error_teaches_remediation(tmp_path: Path) -> Non
     )
     matrix = engagement / "state" / "coverage-matrix.yaml"
     matrix.write_text(
-        "coverage:\n"
-        "  route_a:\n"
-        "    status: tested\n"
-        "    evidence_or_reason: 'no artifact cited'\n",
+        "coverage:\n  route_a:\n    status: tested\n    evidence_or_reason: 'no artifact cited'\n",
         encoding="utf-8",
     )
     with pytest.raises(ValueError) as exc: