diff --git a/src/query/test.ts b/src/query/test.ts
index 0bc647ae..2ee2ec9a 100644
--- a/src/query/test.ts
+++ b/src/query/test.ts
@@ -91,6 +91,18 @@ describe('query', () => {
     ])
   })
 
+  it('type checks the fields', async () => {
+    type Location = { mapId: string; name: string; address?: { city: string } }
+    const locations = collection<Location>('locations')
+
+    await Promise.all([
+      // @ts-expect-error
+      query(locations, [where(['adddddress', 'city'], '==', 'New York')]),
+      // No errors, even though the address is optional
+      query(locations, [where(['address', 'city'], '==', 'New York')])
+    ])
+  })
+
   it('allows to query using array-contains filter', async () => {
     type Tag = 'pets' | 'cats' | 'dogs' | 'food' | 'hotdogs'
     type Post = { blogId: string; title: string; tags: Tag[] }
diff --git a/test/utils.ts b/test/utils.ts
index 595552e8..b669fab8 100644
--- a/test/utils.ts
+++ b/test/utils.ts
@@ -1,4 +1,4 @@
-export function assertType<T>(value: T): asserts value is T {}
+export function assertType<Type>(value: Type) {}
 
 export type TypeEqual<T, U> = Exclude<T, U> extends never
   ? Exclude<U, T> extends never