diff --git a/src/main/services/team/fileLock.ts b/src/main/services/team/fileLock.ts
index 46bb3ada..0a16f976 100644
--- a/src/main/services/team/fileLock.ts
+++ b/src/main/services/team/fileLock.ts
@@ -82,7 +82,7 @@ function writeLockFile(lockPath: string): void {
     }
   }
   if (closeError) {
-    throw closeError;
+    throw closeError instanceof Error ? closeError : new Error('Failed to close file lock');
   }
 }
 
diff --git a/src/renderer/components/team/messages/MessageComposer.pendingSend.test.tsx b/src/renderer/components/team/messages/MessageComposer.pendingSend.test.tsx
index ef6b386d..1bf39883 100644
--- a/src/renderer/components/team/messages/MessageComposer.pendingSend.test.tsx
+++ b/src/renderer/components/team/messages/MessageComposer.pendingSend.test.tsx
@@ -71,9 +71,9 @@ const provisioningHarness = vi.hoisted(() => {
   };
 });
 
-type SuggestionHookOptions = {
+interface SuggestionHookOptions {
   enabled?: boolean;
-};
+}
 
 const suggestionHarness = vi.hoisted(() => {
   const state = {