for _, kv := range ef.Metadata {
			// Object (version) must match all x-amz-meta and
			// standard metadata headers
			// specified in the filter
			var match bool
			for k, v := range obj.UserDefined {
				if !stringsHasPrefixFold(k, "x-amz-meta-") && !isStandardHeader(k) {
					continue
				}
				// We only need to match x-amz-meta or standardHeaders
				if kv.Match(BatchJobKV{Key: k, Value: v}) {

		var objInfo ObjectInfo
		objInfo, err = obj.PutObject(context.Background(), "bucket", key, mustGetPutObjReader(t, bytes.NewBufferString(randomString), int64(len(randomString)), metadata["etag"], ""), ObjectOptions{UserDefined: metadata})
		if err != nil {
			t.Fatalf("%s: <ERROR> %s", instanceType, err)
		}
		if objInfo.ETag != expectedETaghex {
			t.Errorf("Md5 Mismatch")
		}
	}

	for key, value := range objects {