diff --git a/extensions/qa-lab/src/scenario-runtime-api.test.ts b/extensions/qa-lab/src/scenario-runtime-api.test.ts
index b5f3e779c81..f5684a0f863 100644
--- a/extensions/qa-lab/src/scenario-runtime-api.test.ts
+++ b/extensions/qa-lab/src/scenario-runtime-api.test.ts
@@ -153,20 +153,20 @@ describe("createQaScenarioRuntimeApi", () => {
     expect(api.getTransportSnapshot()).toEqual(state.getSnapshot());
     expect(api.imageUnderstandingPngBase64).toBe("png-small");
 
-    const inbound = await api.injectInboundMessage({
+    const inbound = api.injectInboundMessage({
       accountId: "qa-channel",
       conversation: { id: "qa-operator", kind: "direct" },
       senderId: "qa-operator",
       text: "hello",
     });
-    const outbound = await api.injectOutboundMessage({
+    const outbound = api.injectOutboundMessage({
       accountId: "qa-channel",
       to: "dm:qa-operator",
       text: "hi",
     });
     expect(inbound.id).toBeTruthy();
     expect(outbound.id).toBeTruthy();
-    await api.readTransportMessage({ accountId: "qa-channel", messageId: outbound.id });
+    api.readTransportMessage({ accountId: "qa-channel", messageId: outbound.id });
     await api.reset();
     await api.resetBus();
     await api.resetTransport();
diff --git a/extensions/tlon/src/tlon-api.test.ts b/extensions/tlon/src/tlon-api.test.ts
index be352d132e1..98d50e54467 100644
--- a/extensions/tlon/src/tlon-api.test.ts
+++ b/extensions/tlon/src/tlon-api.test.ts
@@ -152,7 +152,9 @@ describe("uploadFile memex upload hardening", () => {
       maxRedirects: 0,
     });
     const firstCall = mockGuardedFetch.mock.calls[0]?.[0];
-    const firstBody = JSON.parse(String(firstCall?.init?.body)) as Record<string, unknown>;
+    const firstBodyRaw = firstCall?.init?.body;
+    expect(typeof firstBodyRaw).toBe("string");
+    const firstBody = JSON.parse(firstBodyRaw as string) as Record<string, unknown>;
     expect(firstBody).toMatchObject({
       token: "genuine-secret",
       contentLength: 11,
diff --git a/extensions/voice-call/index.test.ts b/extensions/voice-call/index.test.ts
index b22098f6b2a..c40df6e59e9 100644
--- a/extensions/voice-call/index.test.ts
+++ b/extensions/voice-call/index.test.ts
@@ -75,7 +75,7 @@ function setup(config: Record<string, unknown>): Registered {
     registerService: () => {},
     resolvePath: (p: string) => p,
   });
-  void plugin.register(api);
+  plugin.register(api);
   return { methods, tools };
 }