diff --git a/tests/test_architecture_baseline_contract.py b/tests/test_architecture_baseline_contract.py
index baacf7ea5..ef8154884 100644
--- a/tests/test_architecture_baseline_contract.py
+++ b/tests/test_architecture_baseline_contract.py
@@ -1,5 +1,6 @@
 """Require the living architecture baseline document at repository root."""
 
+import re
 from pathlib import Path
 
 
@@ -31,4 +32,4 @@ def test_architecture_doctoring_note_exists() -> None:
     assert "Fox" in note
     assert "Jeon" in note
     assert "Kang" in note
-    assert "https://doi.org/" in note
+    assert re.search(r"(?<!\S)https://doi\.org/10\.\d{4,9}/\S+", note)
diff --git a/tests/test_governance_index_contract.py b/tests/test_governance_index_contract.py
index 2e90d25c3..f2a62b2a9 100644
--- a/tests/test_governance_index_contract.py
+++ b/tests/test_governance_index_contract.py
@@ -1,5 +1,6 @@
 """Require the living governance index and its doctoring note."""
 
+import re
 from pathlib import Path
 
 _ROOT = Path(__file__).resolve().parents[1]
@@ -29,4 +30,4 @@ def test_governance_doctoring_cites_multilevel_literature() -> None:
     """Doctoring note must cite multilevel / LSIRM literature."""
     note = _DOC.read_text(encoding="utf-8")
     assert "Fox" in note and "Jeon" in note and "Kang" in note
-    assert "https://doi.org/" in note
+    assert re.search(r"(?<!\S)https://doi\.org/10\.\d{4,9}/\S+", note)