diff --git a/packages/api/tests/moderation-mutewords.test.ts b/packages/api/tests/moderation-mutewords.test.ts
index 681dddc73d8..bb43888f0d0 100644
--- a/packages/api/tests/moderation-mutewords.test.ts
+++ b/packages/api/tests/moderation-mutewords.test.ts
@@ -832,6 +832,7 @@ describe(`hasMutedWord`, () => {
             features: [
               {
                 $type: 'com.example.richtext.facet#other',
+                // @ts-expect-error
                 foo: 'bar',
               },
               {
diff --git a/packages/ozone/tests/_util.ts b/packages/ozone/tests/_util.ts
index ff44443867a..0d5b368f500 100644
--- a/packages/ozone/tests/_util.ts
+++ b/packages/ozone/tests/_util.ts
@@ -4,6 +4,7 @@ import { CID } from 'multiformats/cid'
 import {
   FeedViewPost,
   PostView,
+  ThreadViewPost,
   isPostView,
   isReasonRepost,
   isThreadViewPost,
@@ -191,7 +192,9 @@ export const stripViewerFromPost = (postUnknown: object): PostView => {
 }
 
 // @NOTE mutates
-export const stripViewerFromThread = <T>(thread: T): T => {
+export const stripViewerFromThread = <T extends ThreadViewPost>(
+  thread: T,
+): Omit<T, 'viewer'> => {
   if (!isThreadViewPost(thread)) return thread
   // @ts-expect-error
   delete thread.viewer
@@ -200,7 +203,9 @@ export const stripViewerFromThread = <T>(thread: T): T => {
     thread.parent = stripViewerFromThread(thread.parent)
   }
   if (thread.replies) {
-    thread.replies = thread.replies.map(stripViewerFromThread)
+    thread.replies = thread.replies.map((r) =>
+      isThreadViewPost(r) ? stripViewerFromThread(r) : r,
+    )
   }
   return thread
 }
diff --git a/packages/ozone/tests/blob-divert.test.ts b/packages/ozone/tests/blob-divert.test.ts
index 9c335f20ec3..dc5828f1117 100644
--- a/packages/ozone/tests/blob-divert.test.ts
+++ b/packages/ozone/tests/blob-divert.test.ts
@@ -1,4 +1,5 @@
 import assert from 'node:assert'
+import { ToolsOzoneModerationDefs } from '@atproto/api'
 import {
   ModeratorClient,
   SeedClient,
@@ -50,10 +51,11 @@ describe('blob divert', () => {
     modClient.emitEvent(
       {
         subject: getSubject(),
-        event: {
+        // @ts-expect-error modClient.emitEvent does not declare #modEventDivert
+        event: ((f: ToolsOzoneModerationDefs.ModEventDivert) => f)({
           $type: 'tools.ozone.moderation.defs#modEventDivert',
           comment: 'Diverting for test',
-        },
+        }),
         createdBy: sc.dids.alice,
         subjectBlobCids: sc.posts[sc.dids.carol][0].images.map((img) =>
           img.image.ref.toString(),
diff --git a/packages/ozone/tests/moderation.test.ts b/packages/ozone/tests/moderation.test.ts
index 97e4b2e608e..0c70dce68ad 100644
--- a/packages/ozone/tests/moderation.test.ts
+++ b/packages/ozone/tests/moderation.test.ts
@@ -7,7 +7,11 @@ import {
   basicSeed,
   ModeratorClient,
 } from '@atproto/dev-env'
-import { AtpAgent, ToolsOzoneModerationEmitEvent } from '@atproto/api'
+import {
+  AtpAgent,
+  ChatBskyConvoDefs,
+  ToolsOzoneModerationEmitEvent,
+} from '@atproto/api'
 import { AtUri } from '@atproto/syntax'
 import { forSnapshot } from './_util'
 import {
@@ -157,23 +161,26 @@ describe('moderation', () => {
       const reportA = await sc.createReport({
         reportedBy: sc.dids.alice,
         reasonType: REASONSPAM,
-        subject: {
+        // @ts-expect-error ComAtprotoModerationCreateReport.InputSchema['subject'] does not allow ChatBskyConvoDefs.MessageRef
+        subject: ((f: ChatBskyConvoDefs.MessageRef) => f)({
           $type: 'chat.bsky.convo.defs#messageRef',
           did: sc.dids.carol,
           messageId: messageId1,
           convoId: 'testconvoid1',
-        },
+        }),
       })
       const reportB = await sc.createReport({
         reportedBy: sc.dids.carol,
         reasonType: REASONOTHER,
         reason: 'defamation',
-        subject: {
+        // @ts-expect-error ComAtprotoModerationCreateReport.InputSchema['subject'] does not allow ChatBskyConvoDefs.MessageRef
+        subject: ((f: ChatBskyConvoDefs.MessageRef) => f)({
           $type: 'chat.bsky.convo.defs#messageRef',
           did: sc.dids.carol,
           messageId: messageId2,
-          // @TODO convoId intentionally missing, restore once this behavior is deprecated
-        },
+          // @ts-expect-error convoId intentionally missing, restore once this behavior is deprecated
+          convoId: undefined,
+        }),
       })
       expect(forSnapshot([reportA, reportB])).toMatchSnapshot()
       const events = await ozone.ctx.db.db
diff --git a/packages/pds/tests/preferences.test.ts b/packages/pds/tests/preferences.test.ts
index cf3f2ebb6cc..99a028a8493 100644
--- a/packages/pds/tests/preferences.test.ts
+++ b/packages/pds/tests/preferences.test.ts
@@ -163,6 +163,7 @@ describe('user preferences', () => {
           { $type: 'app.bsky.actor.defs#adultContentPref', enabled: false },
           {
             $type: 'com.atproto.server.defs#unknown',
+            // @ts-expect-error un-spec'ed prop
             hello: 'world',
           },
         ],
diff --git a/packages/pds/tests/seeds/basic.ts b/packages/pds/tests/seeds/basic.ts
index aa843fcbaaa..dee78a8132a 100644
--- a/packages/pds/tests/seeds/basic.ts
+++ b/packages/pds/tests/seeds/basic.ts
@@ -61,7 +61,7 @@ export default async (
         index: { byteStart: 0, byteEnd: 18 },
         features: [
           {
-            $type: `${ids.AppBskyRichtextFacet}#mention`,
+            $type: `${ids.AppBskyRichtextFacet}#mention` as const,
             did: alice,
           },
         ],