diff --git a/playground/0-file-search/chan.go b/playground/0-file-search/search.go
similarity index 100%
rename from playground/0-file-search/chan.go
rename to playground/0-file-search/search.go
diff --git a/playground/0-file-search/test1.log b/playground/0-file-search/test1.log
deleted file mode 100644
index bfc04a9..0000000
--- a/playground/0-file-search/test1.log
+++ /dev/null
@@ -1,2 +0,0 @@
-11
-22
diff --git a/playground/0-file-search/test2.log b/playground/0-file-search/test2.log
deleted file mode 100644
index e69de29..0000000