diff --git a/lists/list_cache.go b/lists/list_cache.go
index e6d826943..0244ce306 100644
--- a/lists/list_cache.go
+++ b/lists/list_cache.go
@@ -273,7 +273,7 @@ func readFile(file string) (io.ReadCloser, error) {
 func processFile(link string, ch chan<- []string, wg *sync.WaitGroup) {
 	defer wg.Done()
 
-	var result []string
+	result := make([]string, 0)
 
 	var r io.ReadCloser
 
diff --git a/lists/list_cache_test.go b/lists/list_cache_test.go
index c8e5d851d..05d188b0c 100644
--- a/lists/list_cache_test.go
+++ b/lists/list_cache_test.go
@@ -102,7 +102,7 @@ var _ = Describe("ListCache", func() {
 				}))
 				defer s.Close()
 				lists := map[string][]string{
-					"gr1": {s.URL},
+					"gr1": {s.URL, emptyFile.Name()},
 				}
 
 				timeout = 100 * time.Millisecond