diff --git a/tests/unit/test_agent_completion_gate.py b/tests/unit/test_agent_completion_gate.py
index 30b8716d0..e57467ecf 100644
--- a/tests/unit/test_agent_completion_gate.py
+++ b/tests/unit/test_agent_completion_gate.py
@@ -2902,6 +2902,10 @@ def test_scheduled_scanner_detects_frozen_intent_changes(self):
   labels: [{name: 'copilot-rabbit'}],
   body: manifest + '\nFixes #870'
 };
+const prWithoutManifest = {
+  ...base,
+  body: 'Fixes #870'
+};
 const rows = [
   ['valid', base, issue, true, []],
   ['draft', {...base, draft: true}, issue, true, ['draft_pr']],
@@ -2933,7 +2937,8 @@ def test_scheduled_scanner_detects_frozen_intent_changes(self):
       run_id: 'run-1'
     }) + ' -->\nFixes #870'
   }, issue, true, ['agent_login_mismatch']],
-  ['missing headings', base, {body: ''}, true, [
+  ['missing headings use parsed manifest fallback', base, {body: ''}, true, []],
+  ['missing headings without manifest fallback', prWithoutManifest, {body: ''}, true, [
     'missing_agent_login',
     'missing_agent_run_id'
   ]],
@@ -3024,20 +3029,21 @@ def test_scheduled_scanner_detects_frozen_intent_changes(self):
   body: '## Agent login\nexample-agent[bot]\n' +
     '## Agent run id\nrun-b'
 };
-const identityA = scheduledContractIdentity(870, issueA, true);
-const identityB = scheduledContractIdentity(871, issueB, true);
-const allNull = scheduledContractIdentity(0, null, true);
+const noPrContext = null;
+const identityA = scheduledContractIdentity(870, issueA, noPrContext, true);
+const identityB = scheduledContractIdentity(871, issueB, noPrContext, true);
+const allNull = scheduledContractIdentity(0, null, noPrContext, true);
 const missingLogin = scheduledContractIdentity(870, {
   body: '## Agent run id\nrun-a'
-}, true);
+}, noPrContext, true);
 const missingRun = scheduledContractIdentity(870, {
   body: '## Agent login\nexample-agent[bot]'
-}, true);
+}, noPrContext, true);
 if (JSON.stringify(identityA) !== JSON.stringify({
   issue_number: 870,
   agent_login: 'example-agent[bot]',
   run_id: 'run-a'
-}) || scheduledContractIdentity(870, issueA, false) !== null) {
+}) || scheduledContractIdentity(870, issueA, noPrContext, false) !== null) {
   throw new Error('contract identity extraction failed');
 }
 const previous = {
@@ -3269,7 +3275,10 @@ def test_legacy_run_id_requires_an_unambiguous_delimiter(self):
             workflow,
             "function legacyRunId(",
         )
-        self.assertEqual(len(functions), 1)
+        # legacyRunId is intentionally duplicated in the scheduled sweep script
+        # and the Collect repository evidence script because github-script steps
+        # execute in isolated runtimes and cannot share helper scope.
+        self.assertEqual(len(functions), 2)
 
         assertions = r"""
 const rows = [
@@ -3293,13 +3302,14 @@ def test_legacy_run_id_requires_an_unambiguous_delimiter(self):
   }
 }
 """
-        completed = subprocess.run(
-            ["node", "-e", functions[0] + assertions],
-            check=False,
-            capture_output=True,
-            text=True,
-        )
-        self.assertEqual(completed.returncode, 0, completed.stderr)
+        for function in functions:
+            completed = subprocess.run(
+                ["node", "-e", function + assertions],
+                check=False,
+                capture_output=True,
+                text=True,
+            )
+            self.assertEqual(completed.returncode, 0, completed.stderr)
 
     def test_extract_run_id_duplicate_parser_matches_legacy(self):
         workflow = self._workflow()
@@ -3356,7 +3366,9 @@ def test_pr_body_fallback_populates_identity_when_issue_fields_absent(self):
             workflow,
             "function legacyRunId(",
         )
-        self.assertEqual(len(functions), 1)
+        # This enforces identical parsing behavior across the scheduled sweep
+        # and collector copies of legacyRunId.
+        self.assertEqual(len(functions), 2)
 
         assertions = r"""
 function section(body, headings) {
@@ -3426,13 +3438,14 @@ def test_pr_body_fallback_populates_identity_when_issue_fields_absent(self):
   throw new Error('issue login should win over fallbacks: ' + fromIssue.login);
 }
 """
-        completed = subprocess.run(
-            ["node", "-e", functions[0] + assertions],
-            check=False,
-            capture_output=True,
-            text=True,
-        )
-        self.assertEqual(completed.returncode, 0, completed.stderr)
+        for function in functions:
+            completed = subprocess.run(
+                ["node", "-e", function + assertions],
+                check=False,
+                capture_output=True,
+                text=True,
+            )
+            self.assertEqual(completed.returncode, 0, completed.stderr)
 
     def test_mismatch_errors_require_manifest_match(self):
         workflow = self._workflow()