diff --git a/core/Cargo.toml b/core/Cargo.toml
index 11d8cf96aa4a..a8a32859e2d9 100644
--- a/core/Cargo.toml
+++ b/core/Cargo.toml
@@ -18,7 +18,7 @@
 [package]
 categories = ["filesystem"]
 description = "OpenDAL: Access data freely, painlessly, and efficiently."
-exclude = ["tests/"]
+exclude = ["/tests/"]
 keywords = ["storage", "fs", "s3", "azblob", "gcs"]
 name = "opendal"