Fix the mistake in the key selection of set collection test.
Fix the mistake in the key selection of set collection test.

naver/arcus-misc,jam2in/arcus-misc,jam2in/arcus-misc,naver/arcus-misc,naver/arcus-misc,naver/arcus-misc,naver/arcus-misc,jam2in/arcus-misc,jam2in/arcus-misc,jam2in/arcus-misc,naver/arcus-misc,naver/arcus-misc,jam2in/arcus-misc,jam2in/arcus-misc,naver/arcus-misc,jam2in/arcus-misc