diff --git a/tests/examples/test_lda_report_workflow_example.py b/tests/examples/test_lda_report_workflow_example.py
index e63f8ebd..a097677c 100644
--- a/tests/examples/test_lda_report_workflow_example.py
+++ b/tests/examples/test_lda_report_workflow_example.py
@@ -240,23 +240,31 @@ async def test_lda_report_workflow_artifact_interrupt_resume_path(
     )
 
     assert started["status"] == "interrupted"
-    assert started["interrupt"]["kind"] == "issue_review"
-    assert started["interrupt"]["typed"] is True
-    assert set(started["interrupt"]["request_schema"]["required"]) == {
+    interrupt = started["interrupt"]
+    assert interrupt is not None
+    assert interrupt["kind"] == "issue_review"
+    assert interrupt["typed"] is True
+    request_required = interrupt["request_schema"].get("required")
+    assert isinstance(request_required, list)
+    assert set(request_required) == {
         "report_markdown",
         "proposed_issues",
     }
-    assert set(started["interrupt"]["resume_schema"]["required"]) == {
+    resume_required = interrupt["resume_schema"].get("required")
+    assert isinstance(resume_required, list)
+    assert set(resume_required) == {
         "approved",
         "selected_issue_ids",
     }
     proposed_ids = [
-        issue["id"] for issue in started["interrupt"]["payload"]["proposed_issues"]
+        issue["id"] for issue in interrupt["payload"]["proposed_issues"]
     ]
     assert proposed_ids
+    started_run_id = started["run_id"]
+    assert isinstance(started_run_id, str)
 
     resumed = await server.api.resume_run(
-        run_id=started["run_id"],
+        run_id=started_run_id,
         resume_payload={
             "approved": True,
             "selected_issue_ids": proposed_ids[:2],
@@ -267,10 +275,12 @@ async def test_lda_report_workflow_artifact_interrupt_resume_path(
 
     assert resumed["status"] == "completed"
     assert resumed["outcome"] == "completed"
-    assert resumed["output"]["approved"] is True
-    assert resumed["output"]["created_issues"]
-    assert resumed["output"]["created_issues"][0]["id"] == "ISSUE-001"
-    assert resumed["output"]["markdown"].startswith(
+    output = resumed["output"]
+    assert output is not None
+    assert output["approved"] is True
+    assert output["created_issues"]
+    assert output["created_issues"][0]["id"] == "ISSUE-001"
+    assert output["markdown"].startswith(
         "# lda.chat Thesis And Project Readiness Report"
     )
 
@@ -312,9 +322,11 @@ async def test_lda_report_workflow_cancelled_resume_path(tmp_path: Path) -> None
         deployment_id="lda_report_cancel_case.default",
         workflow_input=run_input,
     )
+    started_run_id = started["run_id"]
+    assert isinstance(started_run_id, str)
 
     resumed = await server.api.resume_run(
-        run_id=started["run_id"],
+        run_id=started_run_id,
         resume_payload={
             "approved": False,
             "selected_issue_ids": [],
@@ -325,5 +337,7 @@ async def test_lda_report_workflow_cancelled_resume_path(tmp_path: Path) -> None
 
     assert resumed["status"] == "completed"
     assert resumed["outcome"] == "cancelled"
-    assert resumed["output"]["approved"] is False
-    assert "Revision Requested" in resumed["output"]["markdown"]
+    output = resumed["output"]
+    assert output is not None
+    assert output["approved"] is False
+    assert "Revision Requested" in output["markdown"]
diff --git a/tests/wf_api/test_authoring_contracts.py b/tests/wf_api/test_authoring_contracts.py
index 2bb34aae..f53bdc99 100644
--- a/tests/wf_api/test_authoring_contracts.py
+++ b/tests/wf_api/test_authoring_contracts.py
@@ -6,6 +6,7 @@ from wf_api.authoring_contracts import (
     project_authoring_step_contract,
     schema_path_options,
 )
+from wf_api.models import AuthoringPathOptionPayload, AuthoringStepContractPayload
 
 
 def test_schema_path_options_is_parent_first_and_schema_derived() -> None:
@@ -255,7 +256,7 @@ def test_schema_path_options_returns_empty_schema_for_unconstrained_property() -
 
 
 def test_project_authoring_contract_inventory_composes_pure_inputs() -> None:
-    context_entry = {
+    context_entry: AuthoringPathOptionPayload = {
         "path": "context.loop_item",
         "label": "Loop Item",
         "origin": "runtime_context",
@@ -265,7 +266,7 @@ def test_project_authoring_contract_inventory_composes_pure_inputs() -> None:
         "uses": ["step_input"],
         "reason": "Only available inside the foreach body.",
     }
-    step_input_target = {
+    step_input_target: AuthoringPathOptionPayload = {
         "path": "step.input.query",
         "label": "Query",
         "origin": "step_input",
@@ -274,7 +275,7 @@ def test_project_authoring_contract_inventory_composes_pure_inputs() -> None:
         "availability": "available",
         "uses": ["step_input"],
     }
-    step_output_source = {
+    step_output_source: AuthoringPathOptionPayload = {
         "path": "step.output.answer",
         "label": "Answer",
         "origin": "step_output",
@@ -283,7 +284,7 @@ def test_project_authoring_contract_inventory_composes_pure_inputs() -> None:
         "availability": "available",
         "uses": ["step_output_source", "workflow_output"],
     }
-    entry_step = {
+    entry_step: AuthoringStepContractPayload = {
         "step_id": "fetch",
         "label": "Fetch",
     }
@@ -372,8 +373,10 @@ def test_authoring_paths_exclude_incompatible_binding_roles() -> None:
     state_source = inventory["readable_sources"][0]
     assert state_source["path"] == "state.answer"
     assert "step_output_source" not in state_source["uses"]
-    assert step_contract["output_sources"][0]["path"] == "step_output.answer"
-    assert "workflow_output" not in step_contract["output_sources"][0]["uses"]
+    output_sources = step_contract.get("output_sources")
+    assert output_sources is not None
+    assert output_sources[0]["path"] == "step_output.answer"
+    assert "workflow_output" not in output_sources[0]["uses"]
 
 
 def test_context_path_options_are_step_input_only() -> None:
@@ -393,11 +396,12 @@ def test_context_path_options_are_step_input_only() -> None:
     assert options[0]["origin"] == "runtime_context"
     assert options[0]["uses"] == ["step_input"]
     assert options[0]["availability"] == "conditional"
-    assert options[0]["reason"] == "Only available inside the foreach body."
+    reason = options[0].get("reason")
+    assert reason == "Only available inside the foreach body."
 
 
 def test_project_inventory_does_not_offer_context_for_workflow_output() -> None:
-    context_entry = {
+    context_entry: AuthoringPathOptionPayload = {
         "path": "context.item",
         "label": "Item",
         "origin": "runtime_context",